Variations in α-element Ratios Trace the Chemical Evolution of the Disk

It is well established that the chemical structure of the Milky Way exhibits a bimodality with respect to the α -enhancement of stars at a given [Fe/H]. This has been studied largely based on a bulk α abundance, computed as a summary of several individual α -elements. Inspired by the expected subtle...

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Published inThe Astrophysical journal Vol. 883; no. 1; p. 34
Main Authors Blancato, Kirsten, Ness, Melissa, Johnston, Kathryn V., Rybizki, Jan, Bedell, Megan
Format Journal Article
LanguageEnglish
Published Philadelphia IOP Publishing 20.09.2019
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Abstract It is well established that the chemical structure of the Milky Way exhibits a bimodality with respect to the α -enhancement of stars at a given [Fe/H]. This has been studied largely based on a bulk α abundance, computed as a summary of several individual α -elements. Inspired by the expected subtle differences in their nucleosynthetic origins, here we probe the higher level of granularity encoded in the inter-family [Mg/Si] abundance ratio. Using a large sample of stars with APOGEE abundance measurements, we first demonstrate that there is additional information in this ratio beyond what is already apparent in [ α /Fe] and [Fe/H] alone. We then consider Gaia astrometry and stellar age estimates to empirically characterize the relationships between [Mg/Si] and various stellar properties. We find small but significant trends between this ratio and α -enhancement, age, [Fe/H], location in the Galaxy, and orbital actions. To connect these observed [Mg/Si] variations to a physical origin, we attempt to predict the Mg and Si abundances of stars with the galactic chemical evolution model Chempy . We find that we are unable to reproduce abundances for the stars that we fit, which highlights tensions between the yield tables, the chemical evolution model, and the data. We conclude that a more data-driven approach to nucleosynthetic yield tables and chemical evolution modeling is necessary to maximize insights from large spectroscopic surveys.
AbstractList It is well established that the chemical structure of the Milky Way exhibits a bimodality with respect to the α-enhancement of stars at a given [Fe/H]. This has been studied largely based on a bulk α abundance, computed as a summary of several individual α-elements. Inspired by the expected subtle differences in their nucleosynthetic origins, here we probe the higher level of granularity encoded in the inter-family [Mg/Si] abundance ratio. Using a large sample of stars with APOGEE abundance measurements, we first demonstrate that there is additional information in this ratio beyond what is already apparent in [α/Fe] and [Fe/H] alone. We then consider Gaia astrometry and stellar age estimates to empirically characterize the relationships between [Mg/Si] and various stellar properties. We find small but significant trends between this ratio and α-enhancement, age, [Fe/H], location in the Galaxy, and orbital actions. To connect these observed [Mg/Si] variations to a physical origin, we attempt to predict the Mg and Si abundances of stars with the galactic chemical evolution model Chempy. We find that we are unable to reproduce abundances for the stars that we fit, which highlights tensions between the yield tables, the chemical evolution model, and the data. We conclude that a more data-driven approach to nucleosynthetic yield tables and chemical evolution modeling is necessary to maximize insights from large spectroscopic surveys.
It is well established that the chemical structure of the Milky Way exhibits a bimodality with respect to the α -enhancement of stars at a given [Fe/H]. This has been studied largely based on a bulk α abundance, computed as a summary of several individual α -elements. Inspired by the expected subtle differences in their nucleosynthetic origins, here we probe the higher level of granularity encoded in the inter-family [Mg/Si] abundance ratio. Using a large sample of stars with APOGEE abundance measurements, we first demonstrate that there is additional information in this ratio beyond what is already apparent in [ α /Fe] and [Fe/H] alone. We then consider Gaia astrometry and stellar age estimates to empirically characterize the relationships between [Mg/Si] and various stellar properties. We find small but significant trends between this ratio and α -enhancement, age, [Fe/H], location in the Galaxy, and orbital actions. To connect these observed [Mg/Si] variations to a physical origin, we attempt to predict the Mg and Si abundances of stars with the galactic chemical evolution model Chempy . We find that we are unable to reproduce abundances for the stars that we fit, which highlights tensions between the yield tables, the chemical evolution model, and the data. We conclude that a more data-driven approach to nucleosynthetic yield tables and chemical evolution modeling is necessary to maximize insights from large spectroscopic surveys.
Author Ness, Melissa
Bedell, Megan
Rybizki, Jan
Johnston, Kathryn V.
Blancato, Kirsten
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Cites_doi 10.1093/mnras/stz104
10.1086/392523
10.1051/0004-6361/201323038
10.1093/mnras/stw106
10.1093/mnras/stz209
10.1088/0004-637X/707/1/L1
10.1111/j.1365-2966.2006.10148.x
10.1051/0004-6361/201322631
10.1088/0004-637X/724/1/341
10.1051/0004-6361/201526269
10.1146/annurev-astro-082812-140956
10.1088/0004-637X/753/2/148
10.3847/1538-4357/ab07c7
10.1086/300645
10.1088/0004-637X/778/2/149
10.1086/192237
10.1051/0004-6361/201527567
10.1093/mnras/stt444
10.1093/mnras/sty2490
10.1093/mnras/sty972
10.1088/0004-637X/790/2/127
10.1086/670067
10.1088/0004-637X/796/1/38
10.1093/mnras/sts402
10.1051/0004-6361/201730522
10.3847/1538-4357/ab2981
10.1086/316818
10.3847/2041-8213/aac3d8
10.1051/0004-6361/201424244
10.3847/1538-4357/aad908
10.1093/mnras/stx2938
10.3847/1538-4357/aa7ddc
10.1093/mnras/stx1774
10.1093/mnras/sty990
10.1088/0004-637X/808/2/132
10.3847/1538-3881/aa7567
10.1093/mnras/202.4.1025
10.1051/0004-6361/201219401
10.3847/1538-4357/833/2/239
10.1093/mnras/176.1.31
10.1111/j.1365-2966.2010.17975.x
10.3847/1538-4357/aaaf6f
10.3847/1538-4365/aa9e8a
10.1086/157039
10.2140/camcos.2010.5.65
10.1051/0004-6361:20031213
10.1093/mnras/stx3025
10.1088/0004-637X/751/2/131
10.1111/j.1365-2966.2009.16198.x
10.1086/376392
10.3847/1538-4357/aac6e4
10.21105/joss.00024
10.1016/S0375-9474(03)00704-8
10.3847/0004-637X/823/2/114
10.1088/0004-637X/795/1/23
10.1146/annurev-astro-081915-023354
10.1117/12.856708
10.1088/0004-637X/722/2/1879
10.3847/1538-4357/ab1ea5
10.3847/0004-6256/151/6/144
10.1086/422734
10.1088/0004-637X/808/1/16
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References Bedell (apjab39e5bib5) 2014; 795
Bovy (apjab39e5bib12) 2012b; 753
Goodman (apjab39e5bib27) 2010; 5
Philcox (apjab39e5bib50) 2018; 861
Ramírez (apjab39e5bib52) 2014; 572
Bournaud (apjab39e5bib9) 2009; 707
Clarke (apjab39e5bib17) 2019
McWilliam (apjab39e5bib41) 2013; 778
Abolfathi (apjab39e5bib1) 2018; 235
Bensby (apjab39e5bib6) 2003; 410
Sanders (apjab39e5bib56) 2018; 481
Gelman (apjab39e5bib24) 1996; 6
Wilson (apjab39e5bib67) 2010; 7735
Foreman-Mackey (apjab39e5bib18) 2016; 1
Heger (apjab39e5bib33) 2010; 724
Navarro (apjab39e5bib42) 2011; 412
Spina (apjab39e5bib58) 2018; 474
Gandhi (apjab39e5bib22) 2019; 880
Karakas (apjab39e5bib34) 2010; 403
Nomoto (apjab39e5bib47) 2013; 51
Hasselquist (apjab39e5bib30) 2017; 845
Bovy (apjab39e5bib11) 2012a; 751
Fryer (apjab39e5bib20) 2018; 856
Ting (apjab39e5bib60) 2019; 878
Girardi (apjab39e5bib26) 2016; 54
Bovy (apjab39e5bib10) 2014; 790
Tinsley (apjab39e5bib61) 1979; 229
Toyouchi (apjab39e5bib62) 2016; 833
Trick (apjab39e5bib63) 2019; 484
Adibekyan (apjab39e5bib2) 2012; 545
Blanton (apjab39e5bib8) 2017; 154
Nidever (apjab39e5bib45) 2014; 796
Seitenzahl (apjab39e5bib57) 2013; 429
Ventura (apjab39e5bib65) 2013; 431
Thielemann (apjab39e5bib59) 2003; 718
Pagel (apjab39e5bib48) 1997
Gilmore (apjab39e5bib25) 1983; 202
Bensby (apjab39e5bib7) 2014; 562
García Pérez (apjab39e5bib23) 2016; 151
Chabrier (apjab39e5bib14) 2003; 115
Mackereth (apjab39e5bib37) 2017; 471
Carlin (apjab39e5bib13) 2018; 859
Larson (apjab39e5bib35) 1976; 176
Rybizki (apjab39e5bib54) 2017; 605
Grand (apjab39e5bib28) 2018; 474
Reddy (apjab39e5bib53) 2006; 367
Sanders (apjab39e5bib55) 2016; 457
Venn (apjab39e5bib64) 2004; 128
Mackereth (apjab39e5bib38) 2018; 477
Chieffi (apjab39e5bib15) 2004; 608
Mackereth (apjab39e5bib36) 2019
McMillan (apjab39e5bib40) 2018; 477
Ness (apjab39e5bib44) 2015; 808
Foreman-Mackey (apjab39e5bib19) 2013; 125
Gunn (apjab39e5bib29) 1998; 116
Nissen (apjab39e5bib46) 2015; 579
Weinberg (apjab39e5bib66) 2019; 874
Ness (apjab39e5bib43) 2016; 823
Chollet (apjab39e5bib16) 2015
Hayden (apjab39e5bib31) 2015; 808
Maoz (apjab39e5bib39) 2010; 722
Anders (apjab39e5bib3) 2014; 564
Pedregosa (apjab39e5bib49) 2011; 12
Bedell (apjab39e5bib4) 2018; 865
Fuhrmann (apjab39e5bib21) 1998; 338
Haywood (apjab39e5bib32) 2016; 589
Prochaska (apjab39e5bib51) 2000; 120
Woosley (apjab39e5bib68) 1995; 101
References_xml – year: 2019
  ident: apjab39e5bib17
  doi: 10.1093/mnras/stz104
  contributor:
    fullname: Clarke
– volume: 608
  start-page: 405
  year: 2004
  ident: apjab39e5bib15
  publication-title: ApJ
  doi: 10.1086/392523
  contributor:
    fullname: Chieffi
– volume: 564
  start-page: A115
  year: 2014
  ident: apjab39e5bib3
  publication-title: A&A
  doi: 10.1051/0004-6361/201323038
  contributor:
    fullname: Anders
– volume: 457
  start-page: 2107
  year: 2016
  ident: apjab39e5bib55
  publication-title: MNRAS
  doi: 10.1093/mnras/stw106
  contributor:
    fullname: Sanders
– volume: 484
  start-page: 3291
  year: 2019
  ident: apjab39e5bib63
  publication-title: MNRAS
  doi: 10.1093/mnras/stz209
  contributor:
    fullname: Trick
– volume: 707
  start-page: L1
  year: 2009
  ident: apjab39e5bib9
  publication-title: ApJL
  doi: 10.1088/0004-637X/707/1/L1
  contributor:
    fullname: Bournaud
– volume: 367
  start-page: 1329
  year: 2006
  ident: apjab39e5bib53
  publication-title: MNRAS
  doi: 10.1111/j.1365-2966.2006.10148.x
  contributor:
    fullname: Reddy
– volume: 562
  start-page: A71
  year: 2014
  ident: apjab39e5bib7
  publication-title: A&A
  doi: 10.1051/0004-6361/201322631
  contributor:
    fullname: Bensby
– volume: 724
  start-page: 341
  year: 2010
  ident: apjab39e5bib33
  publication-title: ApJ
  doi: 10.1088/0004-637X/724/1/341
  contributor:
    fullname: Heger
– volume: 579
  start-page: A52
  year: 2015
  ident: apjab39e5bib46
  publication-title: A&A
  doi: 10.1051/0004-6361/201526269
  contributor:
    fullname: Nissen
– volume: 51
  start-page: 457
  year: 2013
  ident: apjab39e5bib47
  publication-title: ARA&A
  doi: 10.1146/annurev-astro-082812-140956
  contributor:
    fullname: Nomoto
– volume: 753
  start-page: 148
  year: 2012b
  ident: apjab39e5bib12
  publication-title: ApJ
  doi: 10.1088/0004-637X/753/2/148
  contributor:
    fullname: Bovy
– volume: 874
  start-page: 102
  year: 2019
  ident: apjab39e5bib66
  publication-title: ApJ
  doi: 10.3847/1538-4357/ab07c7
  contributor:
    fullname: Weinberg
– volume: 116
  start-page: 3040
  year: 1998
  ident: apjab39e5bib29
  publication-title: AJ
  doi: 10.1086/300645
  contributor:
    fullname: Gunn
– volume: 778
  start-page: 149
  year: 2013
  ident: apjab39e5bib41
  publication-title: ApJ
  doi: 10.1088/0004-637X/778/2/149
  contributor:
    fullname: McWilliam
– volume: 101
  start-page: 181
  year: 1995
  ident: apjab39e5bib68
  publication-title: ApJS
  doi: 10.1086/192237
  contributor:
    fullname: Woosley
– volume: 589
  start-page: A66
  year: 2016
  ident: apjab39e5bib32
  publication-title: A&A
  doi: 10.1051/0004-6361/201527567
  contributor:
    fullname: Haywood
– volume: 431
  start-page: 3642
  year: 2013
  ident: apjab39e5bib65
  publication-title: MNRAS
  doi: 10.1093/mnras/stt444
  contributor:
    fullname: Ventura
– volume: 481
  start-page: 4093
  year: 2018
  ident: apjab39e5bib56
  publication-title: MNRAS
  doi: 10.1093/mnras/sty2490
  contributor:
    fullname: Sanders
– volume: 477
  start-page: 5072
  year: 2018
  ident: apjab39e5bib38
  publication-title: MNRAS
  doi: 10.1093/mnras/sty972
  contributor:
    fullname: Mackereth
– volume: 790
  start-page: 127
  year: 2014
  ident: apjab39e5bib10
  publication-title: ApJ
  doi: 10.1088/0004-637X/790/2/127
  contributor:
    fullname: Bovy
– volume: 125
  start-page: 306
  year: 2013
  ident: apjab39e5bib19
  publication-title: PASP
  doi: 10.1086/670067
  contributor:
    fullname: Foreman-Mackey
– volume: 796
  start-page: 38
  year: 2014
  ident: apjab39e5bib45
  publication-title: ApJ
  doi: 10.1088/0004-637X/796/1/38
  contributor:
    fullname: Nidever
– volume: 429
  start-page: 1156
  year: 2013
  ident: apjab39e5bib57
  publication-title: MNRAS
  doi: 10.1093/mnras/sts402
  contributor:
    fullname: Seitenzahl
– volume: 605
  start-page: A59
  year: 2017
  ident: apjab39e5bib54
  publication-title: A&A
  doi: 10.1051/0004-6361/201730522
  contributor:
    fullname: Rybizki
– volume: 880
  start-page: 134
  year: 2019
  ident: apjab39e5bib22
  publication-title: ApJ
  doi: 10.3847/1538-4357/ab2981
  contributor:
    fullname: Gandhi
– volume: 120
  start-page: 2513
  year: 2000
  ident: apjab39e5bib51
  publication-title: AJ
  doi: 10.1086/316818
  contributor:
    fullname: Prochaska
– volume: 338
  start-page: 161
  year: 1998
  ident: apjab39e5bib21
  publication-title: A&A
  contributor:
    fullname: Fuhrmann
– volume: 859
  start-page: L10
  year: 2018
  ident: apjab39e5bib13
  publication-title: ApJL
  doi: 10.3847/2041-8213/aac3d8
  contributor:
    fullname: Carlin
– volume: 572
  start-page: A48
  year: 2014
  ident: apjab39e5bib52
  publication-title: A&A
  doi: 10.1051/0004-6361/201424244
  contributor:
    fullname: Ramírez
– volume: 865
  start-page: 68
  year: 2018
  ident: apjab39e5bib4
  publication-title: ApJ
  doi: 10.3847/1538-4357/aad908
  contributor:
    fullname: Bedell
– volume: 474
  start-page: 2580
  year: 2018
  ident: apjab39e5bib58
  publication-title: MNRAS
  doi: 10.1093/mnras/stx2938
  contributor:
    fullname: Spina
– volume: 845
  start-page: 162
  year: 2017
  ident: apjab39e5bib30
  publication-title: ApJ
  doi: 10.3847/1538-4357/aa7ddc
  contributor:
    fullname: Hasselquist
– volume: 471
  start-page: 3057
  year: 2017
  ident: apjab39e5bib37
  publication-title: MNRAS
  doi: 10.1093/mnras/stx1774
  contributor:
    fullname: Mackereth
– year: 2019
  ident: apjab39e5bib36
  contributor:
    fullname: Mackereth
– volume: 477
  start-page: 5279
  year: 2018
  ident: apjab39e5bib40
  publication-title: MNRAS
  doi: 10.1093/mnras/sty990
  contributor:
    fullname: McMillan
– volume: 12
  start-page: 2825
  year: 2011
  ident: apjab39e5bib49
  publication-title: J. Mach. Learn. Res.
  contributor:
    fullname: Pedregosa
– volume: 808
  start-page: 132
  year: 2015
  ident: apjab39e5bib31
  publication-title: ApJ
  doi: 10.1088/0004-637X/808/2/132
  contributor:
    fullname: Hayden
– volume: 154
  start-page: 28
  year: 2017
  ident: apjab39e5bib8
  publication-title: AJ
  doi: 10.3847/1538-3881/aa7567
  contributor:
    fullname: Blanton
– volume: 202
  start-page: 1025
  year: 1983
  ident: apjab39e5bib25
  publication-title: MNRAS
  doi: 10.1093/mnras/202.4.1025
  contributor:
    fullname: Gilmore
– volume: 545
  start-page: A32
  year: 2012
  ident: apjab39e5bib2
  publication-title: A&A
  doi: 10.1051/0004-6361/201219401
  contributor:
    fullname: Adibekyan
– volume: 833
  start-page: 239
  year: 2016
  ident: apjab39e5bib62
  publication-title: ApJ
  doi: 10.3847/1538-4357/833/2/239
  contributor:
    fullname: Toyouchi
– volume: 176
  start-page: 31
  year: 1976
  ident: apjab39e5bib35
  publication-title: MNRAS
  doi: 10.1093/mnras/176.1.31
  contributor:
    fullname: Larson
– volume: 412
  start-page: 1203
  year: 2011
  ident: apjab39e5bib42
  publication-title: MNRAS
  doi: 10.1111/j.1365-2966.2010.17975.x
  contributor:
    fullname: Navarro
– volume: 856
  start-page: 63
  year: 2018
  ident: apjab39e5bib20
  publication-title: ApJ
  doi: 10.3847/1538-4357/aaaf6f
  contributor:
    fullname: Fryer
– volume: 235
  start-page: 42
  year: 2018
  ident: apjab39e5bib1
  publication-title: ApJS
  doi: 10.3847/1538-4365/aa9e8a
  contributor:
    fullname: Abolfathi
– volume: 229
  start-page: 1046
  year: 1979
  ident: apjab39e5bib61
  publication-title: ApJ
  doi: 10.1086/157039
  contributor:
    fullname: Tinsley
– year: 1997
  ident: apjab39e5bib48
  contributor:
    fullname: Pagel
– volume: 5
  start-page: 65
  year: 2010
  ident: apjab39e5bib27
  publication-title: Communications in Applied Mathematics and Computational Science
  doi: 10.2140/camcos.2010.5.65
  contributor:
    fullname: Goodman
– volume: 410
  start-page: 527
  year: 2003
  ident: apjab39e5bib6
  publication-title: A&A
  doi: 10.1051/0004-6361:20031213
  contributor:
    fullname: Bensby
– volume: 6
  start-page: 733
  year: 1996
  ident: apjab39e5bib24
  publication-title: Statistica Sinica
  contributor:
    fullname: Gelman
– volume: 474
  start-page: 3629
  year: 2018
  ident: apjab39e5bib28
  publication-title: MNRAS
  doi: 10.1093/mnras/stx3025
  contributor:
    fullname: Grand
– volume: 751
  start-page: 131
  year: 2012a
  ident: apjab39e5bib11
  publication-title: ApJ
  doi: 10.1088/0004-637X/751/2/131
  contributor:
    fullname: Bovy
– volume: 403
  start-page: 1413
  year: 2010
  ident: apjab39e5bib34
  publication-title: MNRAS
  doi: 10.1111/j.1365-2966.2009.16198.x
  contributor:
    fullname: Karakas
– volume: 115
  start-page: 763
  year: 2003
  ident: apjab39e5bib14
  publication-title: PASP
  doi: 10.1086/376392
  contributor:
    fullname: Chabrier
– volume: 861
  start-page: 40
  year: 2018
  ident: apjab39e5bib50
  publication-title: ApJ
  doi: 10.3847/1538-4357/aac6e4
  contributor:
    fullname: Philcox
– volume: 1
  start-page: 24
  year: 2016
  ident: apjab39e5bib18
  publication-title: JOSS
  doi: 10.21105/joss.00024
  contributor:
    fullname: Foreman-Mackey
– volume: 718
  start-page: 139
  year: 2003
  ident: apjab39e5bib59
  publication-title: NuPhA
  doi: 10.1016/S0375-9474(03)00704-8
  contributor:
    fullname: Thielemann
– volume: 823
  start-page: 114
  year: 2016
  ident: apjab39e5bib43
  publication-title: ApJ
  doi: 10.3847/0004-637X/823/2/114
  contributor:
    fullname: Ness
– volume: 795
  start-page: 23
  year: 2014
  ident: apjab39e5bib5
  publication-title: ApJ
  doi: 10.1088/0004-637X/795/1/23
  contributor:
    fullname: Bedell
– volume: 54
  start-page: 95
  year: 2016
  ident: apjab39e5bib26
  publication-title: ARA&A
  doi: 10.1146/annurev-astro-081915-023354
  contributor:
    fullname: Girardi
– volume: 7735
  year: 2010
  ident: apjab39e5bib67
  publication-title: Proc. SPIE
  doi: 10.1117/12.856708
  contributor:
    fullname: Wilson
– volume: 722
  start-page: 1879
  year: 2010
  ident: apjab39e5bib39
  publication-title: ApJ
  doi: 10.1088/0004-637X/722/2/1879
  contributor:
    fullname: Maoz
– volume: 878
  start-page: 21
  year: 2019
  ident: apjab39e5bib60
  publication-title: ApJ
  doi: 10.3847/1538-4357/ab1ea5
  contributor:
    fullname: Ting
– volume: 151
  start-page: 144
  year: 2016
  ident: apjab39e5bib23
  publication-title: AJ
  doi: 10.3847/0004-6256/151/6/144
  contributor:
    fullname: García Pérez
– volume: 128
  start-page: 1177
  year: 2004
  ident: apjab39e5bib64
  publication-title: AJ
  doi: 10.1086/422734
  contributor:
    fullname: Venn
– year: 2015
  ident: apjab39e5bib16
  contributor:
    fullname: Chollet
– volume: 808
  start-page: 16
  year: 2015
  ident: apjab39e5bib44
  publication-title: ApJ
  doi: 10.1088/0004-637X/808/1/16
  contributor:
    fullname: Ness
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Snippet It is well established that the chemical structure of the Milky Way exhibits a bimodality with respect to the α -enhancement of stars at a given [Fe/H]. This...
It is well established that the chemical structure of the Milky Way exhibits a bimodality with respect to the α-enhancement of stars at a given [Fe/H]. This...
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StartPage 34
SubjectTerms Abundance
Astrometry
Astrophysics
Chemical evolution
Galactic evolution
Galaxies
Iron
Magnesium
Milky Way
Organic chemistry
Silicon
Stellar age
Stellar evolution
Title Variations in α-element Ratios Trace the Chemical Evolution of the Disk
URI https://www.proquest.com/docview/2365817935
Volume 883
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