The Orbits and Dynamical Masses of the Castor System
Castor is a system of six stars in which the two brighter objects, Castor A and B, revolve around each other every \(\sim\)450 yr and are both short-period spectroscopic binaries. They are attended by the more distant Castor C, which is also a binary. Here we report interferometric observations with...
Saved in:
Published in | arXiv.org |
---|---|
Main Authors | , , , , , , , , , , , , , , |
Format | Paper Journal Article |
Language | English |
Published |
Ithaca
Cornell University Library, arXiv.org
28.10.2022
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Abstract | Castor is a system of six stars in which the two brighter objects, Castor A and B, revolve around each other every \(\sim\)450 yr and are both short-period spectroscopic binaries. They are attended by the more distant Castor C, which is also a binary. Here we report interferometric observations with the CHARA array that spatially resolve the companions in Castor A and B for the first time. We complement these observations with new radial velocity measurements of A and B spanning 30 yr, with the Hipparcos intermediate data, and with existing astrometric observations of the visual AB pair obtained over the past three centuries. We perform a joint orbital solution to solve simultaneously for the three-dimensional orbits of Castor A and B as well as the AB orbit. We find that they are far from being coplanar: the orbit of A is nearly at right angles (92 degrees) relative to the wide orbit, and that of B is inclined about 59 degrees compared to AB. We determine the dynamical masses of the four stars in Castor A and B to a precision better than 1%. We also determine the radii of the primary stars of both subsystems from their angular diameters measured with CHARA, and use them together with stellar evolution models to infer an age for the system of 290 Myr. The new knowledge of the orbits enables us to measure the slow motion of Castor C as well, which may assist future studies of the dynamical evolution of this remarkable sextuple system. |
---|---|
AbstractList | Castor is a system of six stars in which the two brighter objects, Castor A
and B, revolve around each other every $\sim$450 yr and are both short-period
spectroscopic binaries. They are attended by the more distant Castor C, which
is also a binary. Here we report interferometric observations with the CHARA
array that spatially resolve the companions in Castor A and B for the first
time. We complement these observations with new radial velocity measurements of
A and B spanning 30 yr, with the Hipparcos intermediate data, and with existing
astrometric observations of the visual AB pair obtained over the past three
centuries. We perform a joint orbital solution to solve simultaneously for the
three-dimensional orbits of Castor A and B as well as the AB orbit. We find
that they are far from being coplanar: the orbit of A is nearly at right angles
(92 degrees) relative to the wide orbit, and that of B is inclined about 59
degrees compared to AB. We determine the dynamical masses of the four stars in
Castor A and B to a precision better than 1%. We also determine the radii of
the primary stars of both subsystems from their angular diameters measured with
CHARA, and use them together with stellar evolution models to infer an age for
the system of 290 Myr. The new knowledge of the orbits enables us to measure
the slow motion of Castor C as well, which may assist future studies of the
dynamical evolution of this remarkable sextuple system. Castor is a system of six stars in which the two brighter objects, Castor A and B, revolve around each other every \(\sim\)450 yr and are both short-period spectroscopic binaries. They are attended by the more distant Castor C, which is also a binary. Here we report interferometric observations with the CHARA array that spatially resolve the companions in Castor A and B for the first time. We complement these observations with new radial velocity measurements of A and B spanning 30 yr, with the Hipparcos intermediate data, and with existing astrometric observations of the visual AB pair obtained over the past three centuries. We perform a joint orbital solution to solve simultaneously for the three-dimensional orbits of Castor A and B as well as the AB orbit. We find that they are far from being coplanar: the orbit of A is nearly at right angles (92 degrees) relative to the wide orbit, and that of B is inclined about 59 degrees compared to AB. We determine the dynamical masses of the four stars in Castor A and B to a precision better than 1%. We also determine the radii of the primary stars of both subsystems from their angular diameters measured with CHARA, and use them together with stellar evolution models to infer an age for the system of 290 Myr. The new knowledge of the orbits enables us to measure the slow motion of Castor C as well, which may assist future studies of the dynamical evolution of this remarkable sextuple system. |
Author | Gardner, Tyler Jean-Baptiste Le Bouquin Ennis, Jacob Schaefer, Gail H Labdon, Aaron Farrington, Christopher D Monnier, John D Anugu, Narsireddy Davies, Claire L Lanthermann, Cyprien Klement, Robert Setterholm, Benjamin R Torres, Guillermo Kraus, Stefan Theo ten Brummelaar |
Author_xml | – sequence: 1 givenname: Guillermo surname: Torres fullname: Torres, Guillermo – sequence: 2 givenname: Gail surname: Schaefer middlename: H fullname: Schaefer, Gail H – sequence: 3 givenname: John surname: Monnier middlename: D fullname: Monnier, John D – sequence: 4 givenname: Narsireddy surname: Anugu fullname: Anugu, Narsireddy – sequence: 5 givenname: Claire surname: Davies middlename: L fullname: Davies, Claire L – sequence: 6 givenname: Jacob surname: Ennis fullname: Ennis, Jacob – sequence: 7 givenname: Christopher surname: Farrington middlename: D fullname: Farrington, Christopher D – sequence: 8 givenname: Tyler surname: Gardner fullname: Gardner, Tyler – sequence: 9 givenname: Robert surname: Klement fullname: Klement, Robert – sequence: 10 givenname: Stefan surname: Kraus fullname: Kraus, Stefan – sequence: 11 givenname: Aaron surname: Labdon fullname: Labdon, Aaron – sequence: 12 givenname: Cyprien surname: Lanthermann fullname: Lanthermann, Cyprien – sequence: 13 fullname: Jean-Baptiste Le Bouquin – sequence: 14 givenname: Benjamin surname: Setterholm middlename: R fullname: Setterholm, Benjamin R – sequence: 15 fullname: Theo ten Brummelaar |
BackLink | https://doi.org/10.48550/arXiv.2210.16322$$DView paper in arXiv https://doi.org/10.3847/1538-4357/ac9d8d$$DView published paper (Access to full text may be restricted) |
BookMark | eNotj8tOwzAQRS0EEqX0A1hhiXWKPX5micJTKuqC7KNxYotUTVLsFNG_J7Ss5mp0dHXPFTnvh94TcsPZUlql2D3Gn_Z7CTA9uBYAZ2QGQvDMSoBLskhpwxgDbUApMSOy_PR0HV07Jop9Qx8PPXZtjVv6jin5RIdAxwkpMI1DpB-HNPrumlwE3Ca_-L9zUj4_lcVrtlq_vBUPqwxzBRlgo5uAQoeglQ4mWONCUysXtAy5U0GgmpJwxjvV1E6iyrkzxlvfSG5BzMntqfaoVO1i22E8VH9q1VFtIu5OxC4OX3ufxmoz7GM_barACGZzxbUWvzVBUoc |
ContentType | Paper Journal Article |
Copyright | 2022. This work is published under http://arxiv.org/licenses/nonexclusive-distrib/1.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. http://arxiv.org/licenses/nonexclusive-distrib/1.0 |
Copyright_xml | – notice: 2022. This work is published under http://arxiv.org/licenses/nonexclusive-distrib/1.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. – notice: http://arxiv.org/licenses/nonexclusive-distrib/1.0 |
DBID | 8FE 8FG ABJCF ABUWG AFKRA AZQEC BENPR BGLVJ CCPQU DWQXO HCIFZ L6V M7S PIMPY PQEST PQQKQ PQUKI PRINS PTHSS GOX |
DOI | 10.48550/arxiv.2210.16322 |
DatabaseName | ProQuest SciTech Collection ProQuest Technology Collection Materials Science & Engineering Database (Proquest) ProQuest Central (Alumni) ProQuest Central ProQuest Central Essentials AUTh Library subscriptions: ProQuest Central Technology Collection ProQuest One Community College ProQuest Central SciTech Premium Collection ProQuest Engineering Collection Engineering Database Publicly Available Content Database ProQuest One Academic Eastern Edition (DO NOT USE) ProQuest One Academic ProQuest One Academic UKI Edition ProQuest Central China Engineering Collection arXiv.org |
DatabaseTitle | Publicly Available Content Database Engineering Database Technology Collection ProQuest Central Essentials ProQuest One Academic Eastern Edition ProQuest Central (Alumni Edition) SciTech Premium Collection ProQuest One Community College ProQuest Technology Collection ProQuest SciTech Collection ProQuest Central China ProQuest Central ProQuest Engineering Collection ProQuest One Academic UKI Edition ProQuest Central Korea Materials Science & Engineering Collection ProQuest One Academic Engineering Collection |
DatabaseTitleList | Publicly Available Content Database |
Database_xml | – sequence: 1 dbid: GOX name: arXiv.org url: http://arxiv.org/find sourceTypes: Open Access Repository – sequence: 2 dbid: 8FG name: ProQuest Technology Collection url: https://search.proquest.com/technologycollection1 sourceTypes: Aggregation Database |
DeliveryMethod | fulltext_linktorsrc |
Discipline | Physics |
EISSN | 2331-8422 |
ExternalDocumentID | 2210_16322 |
Genre | Working Paper/Pre-Print |
GroupedDBID | 8FE 8FG ABJCF ABUWG AFKRA ALMA_UNASSIGNED_HOLDINGS AZQEC BENPR BGLVJ CCPQU DWQXO FRJ HCIFZ L6V M7S M~E PIMPY PQEST PQQKQ PQUKI PRINS PTHSS GOX |
ID | FETCH-LOGICAL-a952-2ad6dfa36ff656f7f87bfdc5bf64f9b5f3a564f3b7eb5dcb4a591b77e8ed41823 |
IEDL.DBID | 8FG |
IngestDate | Mon Jan 08 05:49:24 EST 2024 Fri Sep 13 04:19:19 EDT 2024 |
IsDoiOpenAccess | true |
IsOpenAccess | true |
IsPeerReviewed | false |
IsScholarly | false |
Language | English |
LinkModel | DirectLink |
MergedId | FETCHMERGED-LOGICAL-a952-2ad6dfa36ff656f7f87bfdc5bf64f9b5f3a564f3b7eb5dcb4a591b77e8ed41823 |
OpenAccessLink | https://www.proquest.com/docview/2730895166/abstract/?pq-origsite=%requestingapplication% |
PQID | 2730895166 |
PQPubID | 2050157 |
ParticipantIDs | arxiv_primary_2210_16322 proquest_journals_2730895166 |
PublicationCentury | 2000 |
PublicationDate | 20221028 2022-10-28 |
PublicationDateYYYYMMDD | 2022-10-28 |
PublicationDate_xml | – month: 10 year: 2022 text: 20221028 day: 28 |
PublicationDecade | 2020 |
PublicationPlace | Ithaca |
PublicationPlace_xml | – name: Ithaca |
PublicationTitle | arXiv.org |
PublicationYear | 2022 |
Publisher | Cornell University Library, arXiv.org |
Publisher_xml | – name: Cornell University Library, arXiv.org |
SSID | ssj0002672553 |
Score | 1.8563809 |
SecondaryResourceType | preprint |
Snippet | Castor is a system of six stars in which the two brighter objects, Castor A and B, revolve around each other every \(\sim\)450 yr and are both short-period... Castor is a system of six stars in which the two brighter objects, Castor A and B, revolve around each other every $\sim$450 yr and are both short-period... |
SourceID | arxiv proquest |
SourceType | Open Access Repository Aggregation Database |
SubjectTerms | Astronomical models Binary stars Diameters Orbits Physics - Solar and Stellar Astrophysics Radial velocity Stellar evolution Subsystems Visual observation |
SummonAdditionalLinks | – databaseName: arXiv.org dbid: GOX link: http://utb.summon.serialssolutions.com/2.0.0/link/0/eLvHCXMwdV1NSwMxEB3anryIotJqlRy8LtZ8bfYo1VqE2kuF3pbJZgd6UWlX8ed3kt3iQbyFMDnkZWbyQiYvALdG6-BswZEWHGZaFzpjVhR1b6lSZqLykCQ2Fq92_qZf1mbdA3F4C4Pbn813qw_sd3dSxqC27HR96EsZS7ael-v2cjJJcXX2v3bMMVPXn9Sa9ovZCRx3RE88tCtzCr36_Qw0r4pYbv2m2Qk-wovH9j94tltgvH0VHySYkYkpxqJF0cqJn8Nq9rSazrPu34IMCyMzicEGQmWJmCxRTi73FCrjyWoqvCGFhlvK57U3ofIaTXHv87x2ddBM99UFDPjoXw9BFA6xIq-DrJQOnJu0tcigE7s2TioawTDNtvxspSnKCESZgBjB-ABA2bnlrmSuMnHMqay9_H_kFRzJWOPPCVq6MQya7Vd9zTtv428S_HtfS4LB priority: 102 providerName: Cornell University |
Title | The Orbits and Dynamical Masses of the Castor System |
URI | https://www.proquest.com/docview/2730895166/abstract/ https://arxiv.org/abs/2210.16322 |
hasFullText | 1 |
inHoldings | 1 |
isFullTextHit | |
isPrint | |
link | http://utb.summon.serialssolutions.com/2.0.0/link/0/eLvHCXMwfV1LS8NAEB5qg-DNJ1Vr2YPXmDb7SHISrH0g9IFU6C3sIwsFaWtaxZO_3dlNqwfBS8jjlJndb2bn8Q3ALWfMpCLDnWZSGTKWsRC9Isd7azXlbZoYT7ExGovhC3ua83kNhvteGFdWucdED9RmpV2MPEIz207RHRAikspFAfQ2ul-_hW5-lMuz7oZpHEDQcZx4rme8P_iJtsQiQd-ZVmlNT-IVyfJz8XEXxw42BHXDcwP_6g8oe0vTP4ZgKtdFeQK1YnkKh75AU2_OgKE-yaRUi-2G4OGfPFaT5OUrGUmXtyUrS9CXI13pyh1JRUR-DrN-b9YdhruJB6HMeBzG0ghjJRXWoptlE5smyhrNlRXMZopbKjneUZUUihutmORZRyVJkRaG4UGBXkB9uVoWDSBZKqW2iplYU2YQ1ZgQEtVlcVPItraX0PB_m68rUovcCSL3griE5l4A-W5Bb_Jf8V_9__kajmLXIYDwHqdNqG_L9-IG7fZWtbxKWhA89MbTZ3waTOZ4HX31vgHhPJsZ |
link.rule.ids | 228,230,786,790,891,12792,21416,27958,33408,33779,43635,43840 |
linkProvider | ProQuest |
linkToHtml | http://utb.summon.serialssolutions.com/2.0.0/link/0/eLvHCXMwfV1LT8JAEJ4ojdGbz4Ci7sFrBbuPticTEYIKSAwm3Jp9dBMSA9ii8ec7uxQ9mHhr2lNnut88-30AV5wxk4gUT5pJZMhYykLMihzvrdWUt2lsPMXGcCT6r-xxyqdVw62s1io3mOiB2iy065G3MMy2E0wHhLhdvodONcpNVysJjW0IGMVSpQbBXXc0fvnpskQixpyZrseZnryrJYuv2ed1FDm4ENSJ5gb-1h8w9hGmtw_BWC7z4gC28vkh7PjFTF0eAUM_kudCzVYlwaKf3K8V5OUbGUo3ryULSzCHIx3p1hzJmoD8GCa97qTTDyulg1CmPAojaYSxkgprMb2ysU1iZY3mygpmU8UtlRyvqIpzxY1WTPL0RsVxnuSGYYFAT6A2X8zzOpA0kVJbxUykKTOIZkwIiW6yeBhkW9sG1P3bZss1mUXmDJF5QzSguTFAVn3IZfZr9tP_H1_Cbn8yHGSDh9HTGexF7i8BhPgoaUJtVXzk5xi7V-qictA3FOSX0w |
openUrl | ctx_ver=Z39.88-2004&ctx_enc=info%3Aofi%2Fenc%3AUTF-8&rfr_id=info%3Asid%2Fsummon.serialssolutions.com&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.atitle=The+Orbits+and+Dynamical+Masses+of+the+Castor+System&rft.jtitle=arXiv.org&rft.au=Torres%2C+Guillermo&rft.au=Schaefer%2C+Gail+H&rft.au=Monnier%2C+John+D&rft.au=Anugu%2C+Narsireddy&rft.date=2022-10-28&rft.pub=Cornell+University+Library%2C+arXiv.org&rft.eissn=2331-8422&rft_id=info:doi/10.48550%2Farxiv.2210.16322 |