The Dynamics of the Merging Galaxy Cluster System A2256: Evidence for a New Subcluster
We present 236 new radial velocities of galaxies in the cluster A2256 measured with the WIYN Hydra multi-object spectrograph. Combined with the previous work of Fabricant, Kent, and Kurtz (1989), we have velocities for a total of 319 galaxies of which 277 are cluster members. In addition to the new...
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| Main Authors | , , |
|---|---|
| Format | Journal Article |
| Language | English |
| Published |
21.01.2002
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| Abstract | We present 236 new radial velocities of galaxies in the cluster A2256
measured with the WIYN Hydra multi-object spectrograph. Combined with the
previous work of Fabricant, Kent, and Kurtz (1989), we have velocities for a
total of 319 galaxies of which 277 are cluster members. In addition to the new
radial velocities, we present a 3x3 image mosaic in the R band of the central
19'x19' region of A2256, from which we obtained photometry for 861 galaxies.
These data provide strong evidence for a merger event between two groups. In
addition, we present evidence for the presence of a third group, on the outer
reaches of the system, that is just now beginning to merge with the system. |
|---|---|
| AbstractList | We present 236 new radial velocities of galaxies in the cluster A2256
measured with the WIYN Hydra multi-object spectrograph. Combined with the
previous work of Fabricant, Kent, and Kurtz (1989), we have velocities for a
total of 319 galaxies of which 277 are cluster members. In addition to the new
radial velocities, we present a 3x3 image mosaic in the R band of the central
19'x19' region of A2256, from which we obtained photometry for 861 galaxies.
These data provide strong evidence for a merger event between two groups. In
addition, we present evidence for the presence of a third group, on the outer
reaches of the system, that is just now beginning to merge with the system. |
| Author | Berrington, R. C Lugger, P. M Cohn, H. N |
| Author_xml | – sequence: 1 givenname: R. C surname: Berrington fullname: Berrington, R. C – sequence: 2 givenname: P. M surname: Lugger fullname: Lugger, P. M – sequence: 3 givenname: H. N surname: Cohn fullname: Cohn, H. N |
| BackLink | https://doi.org/10.1086/339840$$DView published paper (Access to full text may be restricted) https://doi.org/10.48550/arXiv.astro-ph/0201356$$DView paper in arXiv |
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| Snippet | We present 236 new radial velocities of galaxies in the cluster A2256
measured with the WIYN Hydra multi-object spectrograph. Combined with the
previous work... |
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| SubjectTerms | Physics - Astrophysics of Galaxies Physics - Cosmology and Nongalactic Astrophysics Physics - Earth and Planetary Astrophysics Physics - High Energy Astrophysical Phenomena Physics - Instrumentation and Methods for Astrophysics Physics - Solar and Stellar Astrophysics |
| Title | The Dynamics of the Merging Galaxy Cluster System A2256: Evidence for a New Subcluster |
| URI | https://arxiv.org/abs/astro-ph/0201356 |
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