Loading…
Mysterious Globular Cluster System of the Peculiar Massive Galaxy M85
We present a study on the stellar population and kinematics of globular clusters (GCs) in the peculiar galaxy M85. We obtain optical spectra of 89 GCs at 8 kpc < R < 160 kpc using the MMT/Hectospec. We divide them into three groups, blue/green/red GCs (B/G/RGCs), with their (g − i)0 colors. Al...
Saved in:
Published in: | The Astrophysical journal 2020-11, Vol.903 (2), p.110 |
---|---|
Main Authors: | , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
cited_by | cdi_FETCH-LOGICAL-c380t-e6f3951261338281551a364365614cb304f725b40c12f30a62e2a2cf15b65963 |
---|---|
cites | cdi_FETCH-LOGICAL-c380t-e6f3951261338281551a364365614cb304f725b40c12f30a62e2a2cf15b65963 |
container_end_page | |
container_issue | 2 |
container_start_page | 110 |
container_title | The Astrophysical journal |
container_volume | 903 |
creator | Ko, Youkyung Lee, Myung Gyoon Park, Hong Soo Sohn, Jubee Lim, Sungsoon Hwang, Narae Park, Byeong-Gon |
description | We present a study on the stellar population and kinematics of globular clusters (GCs) in the peculiar galaxy M85. We obtain optical spectra of 89 GCs at 8 kpc < R < 160 kpc using the MMT/Hectospec. We divide them into three groups, blue/green/red GCs (B/G/RGCs), with their (g − i)0 colors. All GC subpopulations have mean ages of about 10 Gyr, but showing differences in metallicities. The BGCs and RGCs are the most metal-poor ([Z/H] ∼ −1.49) and metal-rich ([Z/H] ∼ −0.45), respectively, and the GGCs are in between. We find that the inner GC system exhibits a strong overall rotation that is entirely due to a disklike rotation of the RGC system. The BGC system shows little rotation. The GGCs show kinematic properties clearly distinct among the GC subpopulations, having higher mean velocities than the BGCs and RGCs and being aligned along the major axis of M85. This implies that the GGCs have an origin different from the other GC subpopulations. The rotation-corrected velocity dispersion of the RGC system is much lower than that of the BGC system, indicating the truncation of the red halo of M85. The BGCs have a flat velocity dispersion profile out to R = 67 kpc, reflecting the dark matter extent of M85. Using the velocity dispersion of the BGC system, we estimate the dynamical mass of M85 to be 3.8 × 1012 M . We infer that M85 has undergone merging events lately, resulting in the peculiar kinematics of the GC system. |
doi_str_mv | 10.3847/1538-4357/abbd39 |
format | article |
fullrecord | <record><control><sourceid>proquest_iop_j</sourceid><recordid>TN_cdi_proquest_journals_2458985447</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>2458985447</sourcerecordid><originalsourceid>FETCH-LOGICAL-c380t-e6f3951261338281551a364365614cb304f725b40c12f30a62e2a2cf15b65963</originalsourceid><addsrcrecordid>eNp9kM9LwzAUx4MoOKd3jwHxZl2Sl6TJUYZOYUPBHbyFtEuwozM1acX997ZU9CKeHu99fzz4IHROyTUons-oAJVxEPnMFsUG9AGa_JwO0YQQwjMJ-csxOklpO6xM6wm6Xe1T62IVuoQXdSi62kY8r7vhiJ8HbYeDx-2rw0-u7Oqql1c2perD4YWt7ecer5Q4RUfe1smdfc8pWt_druf32fJx8TC_WWYlKNJmTnrQgjJJARRTVAhqQXKQQlJeFkC4z5koOCkp80CsZI5ZVnoqCim0hCm6GGubGN47l1qzDV186z8axoXSSnCe9y4yusoYUorOmyZWOxv3hhIzsDIDGDOAMSOrPnI1RqrQ_Hb-Y7_8w26brdEEDDO0TzYbD18zY3U-</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>2458985447</pqid></control><display><type>article</type><title>Mysterious Globular Cluster System of the Peculiar Massive Galaxy M85</title><source>EZB Electronic Journals Library</source><creator>Ko, Youkyung ; Lee, Myung Gyoon ; Park, Hong Soo ; Sohn, Jubee ; Lim, Sungsoon ; Hwang, Narae ; Park, Byeong-Gon</creator><creatorcontrib>Ko, Youkyung ; Lee, Myung Gyoon ; Park, Hong Soo ; Sohn, Jubee ; Lim, Sungsoon ; Hwang, Narae ; Park, Byeong-Gon</creatorcontrib><description>We present a study on the stellar population and kinematics of globular clusters (GCs) in the peculiar galaxy M85. We obtain optical spectra of 89 GCs at 8 kpc < R < 160 kpc using the MMT/Hectospec. We divide them into three groups, blue/green/red GCs (B/G/RGCs), with their (g − i)0 colors. All GC subpopulations have mean ages of about 10 Gyr, but showing differences in metallicities. The BGCs and RGCs are the most metal-poor ([Z/H] ∼ −1.49) and metal-rich ([Z/H] ∼ −0.45), respectively, and the GGCs are in between. We find that the inner GC system exhibits a strong overall rotation that is entirely due to a disklike rotation of the RGC system. The BGC system shows little rotation. The GGCs show kinematic properties clearly distinct among the GC subpopulations, having higher mean velocities than the BGCs and RGCs and being aligned along the major axis of M85. This implies that the GGCs have an origin different from the other GC subpopulations. The rotation-corrected velocity dispersion of the RGC system is much lower than that of the BGC system, indicating the truncation of the red halo of M85. The BGCs have a flat velocity dispersion profile out to R = 67 kpc, reflecting the dark matter extent of M85. Using the velocity dispersion of the BGC system, we estimate the dynamical mass of M85 to be 3.8 × 1012 M . We infer that M85 has undergone merging events lately, resulting in the peculiar kinematics of the GC system.</description><identifier>ISSN: 0004-637X</identifier><identifier>EISSN: 1538-4357</identifier><identifier>DOI: 10.3847/1538-4357/abbd39</identifier><language>eng</language><publisher>Philadelphia: The American Astronomical Society</publisher><subject>Astrophysics ; Dark matter ; Dispersion ; Elliptical galaxies ; Galactic clusters ; Galaxies ; Globular clusters ; Globular star clusters ; Kinematics ; Lenticular galaxies ; Peculiar galaxies ; Rotating disks ; Rotation ; Stars & galaxies ; Subpopulations ; Velocity ; Virgo Cluster</subject><ispartof>The Astrophysical journal, 2020-11, Vol.903 (2), p.110</ispartof><rights>2020. The American Astronomical Society. All rights reserved.</rights><rights>Copyright IOP Publishing Nov 01, 2020</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c380t-e6f3951261338281551a364365614cb304f725b40c12f30a62e2a2cf15b65963</citedby><cites>FETCH-LOGICAL-c380t-e6f3951261338281551a364365614cb304f725b40c12f30a62e2a2cf15b65963</cites><orcidid>0000-0002-5049-4390 ; 0000-0002-2013-1273 ; 0000-0001-6333-599X ; 0000-0002-9254-144X ; 0000-0003-2713-6744 ; 0000-0002-3505-3036</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>315,786,790,27957,27958</link.rule.ids></links><search><creatorcontrib>Ko, Youkyung</creatorcontrib><creatorcontrib>Lee, Myung Gyoon</creatorcontrib><creatorcontrib>Park, Hong Soo</creatorcontrib><creatorcontrib>Sohn, Jubee</creatorcontrib><creatorcontrib>Lim, Sungsoon</creatorcontrib><creatorcontrib>Hwang, Narae</creatorcontrib><creatorcontrib>Park, Byeong-Gon</creatorcontrib><title>Mysterious Globular Cluster System of the Peculiar Massive Galaxy M85</title><title>The Astrophysical journal</title><addtitle>APJ</addtitle><addtitle>Astrophys. J</addtitle><description>We present a study on the stellar population and kinematics of globular clusters (GCs) in the peculiar galaxy M85. We obtain optical spectra of 89 GCs at 8 kpc < R < 160 kpc using the MMT/Hectospec. We divide them into three groups, blue/green/red GCs (B/G/RGCs), with their (g − i)0 colors. All GC subpopulations have mean ages of about 10 Gyr, but showing differences in metallicities. The BGCs and RGCs are the most metal-poor ([Z/H] ∼ −1.49) and metal-rich ([Z/H] ∼ −0.45), respectively, and the GGCs are in between. We find that the inner GC system exhibits a strong overall rotation that is entirely due to a disklike rotation of the RGC system. The BGC system shows little rotation. The GGCs show kinematic properties clearly distinct among the GC subpopulations, having higher mean velocities than the BGCs and RGCs and being aligned along the major axis of M85. This implies that the GGCs have an origin different from the other GC subpopulations. The rotation-corrected velocity dispersion of the RGC system is much lower than that of the BGC system, indicating the truncation of the red halo of M85. The BGCs have a flat velocity dispersion profile out to R = 67 kpc, reflecting the dark matter extent of M85. Using the velocity dispersion of the BGC system, we estimate the dynamical mass of M85 to be 3.8 × 1012 M . We infer that M85 has undergone merging events lately, resulting in the peculiar kinematics of the GC system.</description><subject>Astrophysics</subject><subject>Dark matter</subject><subject>Dispersion</subject><subject>Elliptical galaxies</subject><subject>Galactic clusters</subject><subject>Galaxies</subject><subject>Globular clusters</subject><subject>Globular star clusters</subject><subject>Kinematics</subject><subject>Lenticular galaxies</subject><subject>Peculiar galaxies</subject><subject>Rotating disks</subject><subject>Rotation</subject><subject>Stars & galaxies</subject><subject>Subpopulations</subject><subject>Velocity</subject><subject>Virgo Cluster</subject><issn>0004-637X</issn><issn>1538-4357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNp9kM9LwzAUx4MoOKd3jwHxZl2Sl6TJUYZOYUPBHbyFtEuwozM1acX997ZU9CKeHu99fzz4IHROyTUons-oAJVxEPnMFsUG9AGa_JwO0YQQwjMJ-csxOklpO6xM6wm6Xe1T62IVuoQXdSi62kY8r7vhiJ8HbYeDx-2rw0-u7Oqql1c2perD4YWt7ecer5Q4RUfe1smdfc8pWt_druf32fJx8TC_WWYlKNJmTnrQgjJJARRTVAhqQXKQQlJeFkC4z5koOCkp80CsZI5ZVnoqCim0hCm6GGubGN47l1qzDV186z8axoXSSnCe9y4yusoYUorOmyZWOxv3hhIzsDIDGDOAMSOrPnI1RqrQ_Hb-Y7_8w26brdEEDDO0TzYbD18zY3U-</recordid><startdate>20201101</startdate><enddate>20201101</enddate><creator>Ko, Youkyung</creator><creator>Lee, Myung Gyoon</creator><creator>Park, Hong Soo</creator><creator>Sohn, Jubee</creator><creator>Lim, Sungsoon</creator><creator>Hwang, Narae</creator><creator>Park, Byeong-Gon</creator><general>The American Astronomical Society</general><general>IOP Publishing</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>8FD</scope><scope>H8D</scope><scope>KL.</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0002-5049-4390</orcidid><orcidid>https://orcid.org/0000-0002-2013-1273</orcidid><orcidid>https://orcid.org/0000-0001-6333-599X</orcidid><orcidid>https://orcid.org/0000-0002-9254-144X</orcidid><orcidid>https://orcid.org/0000-0003-2713-6744</orcidid><orcidid>https://orcid.org/0000-0002-3505-3036</orcidid></search><sort><creationdate>20201101</creationdate><title>Mysterious Globular Cluster System of the Peculiar Massive Galaxy M85</title><author>Ko, Youkyung ; Lee, Myung Gyoon ; Park, Hong Soo ; Sohn, Jubee ; Lim, Sungsoon ; Hwang, Narae ; Park, Byeong-Gon</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c380t-e6f3951261338281551a364365614cb304f725b40c12f30a62e2a2cf15b65963</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Astrophysics</topic><topic>Dark matter</topic><topic>Dispersion</topic><topic>Elliptical galaxies</topic><topic>Galactic clusters</topic><topic>Galaxies</topic><topic>Globular clusters</topic><topic>Globular star clusters</topic><topic>Kinematics</topic><topic>Lenticular galaxies</topic><topic>Peculiar galaxies</topic><topic>Rotating disks</topic><topic>Rotation</topic><topic>Stars & galaxies</topic><topic>Subpopulations</topic><topic>Velocity</topic><topic>Virgo Cluster</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ko, Youkyung</creatorcontrib><creatorcontrib>Lee, Myung Gyoon</creatorcontrib><creatorcontrib>Park, Hong Soo</creatorcontrib><creatorcontrib>Sohn, Jubee</creatorcontrib><creatorcontrib>Lim, Sungsoon</creatorcontrib><creatorcontrib>Hwang, Narae</creatorcontrib><creatorcontrib>Park, Byeong-Gon</creatorcontrib><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>The Astrophysical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ko, Youkyung</au><au>Lee, Myung Gyoon</au><au>Park, Hong Soo</au><au>Sohn, Jubee</au><au>Lim, Sungsoon</au><au>Hwang, Narae</au><au>Park, Byeong-Gon</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Mysterious Globular Cluster System of the Peculiar Massive Galaxy M85</atitle><jtitle>The Astrophysical journal</jtitle><stitle>APJ</stitle><addtitle>Astrophys. J</addtitle><date>2020-11-01</date><risdate>2020</risdate><volume>903</volume><issue>2</issue><spage>110</spage><pages>110-</pages><issn>0004-637X</issn><eissn>1538-4357</eissn><notes>Galaxies and Cosmology</notes><notes>AAS25485</notes><abstract>We present a study on the stellar population and kinematics of globular clusters (GCs) in the peculiar galaxy M85. We obtain optical spectra of 89 GCs at 8 kpc < R < 160 kpc using the MMT/Hectospec. We divide them into three groups, blue/green/red GCs (B/G/RGCs), with their (g − i)0 colors. All GC subpopulations have mean ages of about 10 Gyr, but showing differences in metallicities. The BGCs and RGCs are the most metal-poor ([Z/H] ∼ −1.49) and metal-rich ([Z/H] ∼ −0.45), respectively, and the GGCs are in between. We find that the inner GC system exhibits a strong overall rotation that is entirely due to a disklike rotation of the RGC system. The BGC system shows little rotation. The GGCs show kinematic properties clearly distinct among the GC subpopulations, having higher mean velocities than the BGCs and RGCs and being aligned along the major axis of M85. This implies that the GGCs have an origin different from the other GC subpopulations. The rotation-corrected velocity dispersion of the RGC system is much lower than that of the BGC system, indicating the truncation of the red halo of M85. The BGCs have a flat velocity dispersion profile out to R = 67 kpc, reflecting the dark matter extent of M85. Using the velocity dispersion of the BGC system, we estimate the dynamical mass of M85 to be 3.8 × 1012 M . We infer that M85 has undergone merging events lately, resulting in the peculiar kinematics of the GC system.</abstract><cop>Philadelphia</cop><pub>The American Astronomical Society</pub><doi>10.3847/1538-4357/abbd39</doi><tpages>15</tpages><orcidid>https://orcid.org/0000-0002-5049-4390</orcidid><orcidid>https://orcid.org/0000-0002-2013-1273</orcidid><orcidid>https://orcid.org/0000-0001-6333-599X</orcidid><orcidid>https://orcid.org/0000-0002-9254-144X</orcidid><orcidid>https://orcid.org/0000-0003-2713-6744</orcidid><orcidid>https://orcid.org/0000-0002-3505-3036</orcidid><oa>free_for_read</oa></addata></record> |
fulltext | fulltext |
identifier | ISSN: 0004-637X |
ispartof | The Astrophysical journal, 2020-11, Vol.903 (2), p.110 |
issn | 0004-637X 1538-4357 |
language | eng |
recordid | cdi_proquest_journals_2458985447 |
source | EZB Electronic Journals Library |
subjects | Astrophysics Dark matter Dispersion Elliptical galaxies Galactic clusters Galaxies Globular clusters Globular star clusters Kinematics Lenticular galaxies Peculiar galaxies Rotating disks Rotation Stars & galaxies Subpopulations Velocity Virgo Cluster |
title | Mysterious Globular Cluster System of the Peculiar Massive Galaxy M85 |
url | http://sfxeu10.hosted.exlibrisgroup.com/loughborough?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-09-28T17%3A31%3A55IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_iop_j&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Mysterious%20Globular%20Cluster%20System%20of%20the%20Peculiar%20Massive%20Galaxy%20M85&rft.jtitle=The%20Astrophysical%20journal&rft.au=Ko,%20Youkyung&rft.date=2020-11-01&rft.volume=903&rft.issue=2&rft.spage=110&rft.pages=110-&rft.issn=0004-637X&rft.eissn=1538-4357&rft_id=info:doi/10.3847/1538-4357/abbd39&rft_dat=%3Cproquest_iop_j%3E2458985447%3C/proquest_iop_j%3E%3Cgrp_id%3Ecdi_FETCH-LOGICAL-c380t-e6f3951261338281551a364365614cb304f725b40c12f30a62e2a2cf15b65963%3C/grp_id%3E%3Coa%3E%3C/oa%3E%3Curl%3E%3C/url%3E&rft_id=info:oai/&rft_pqid=2458985447&rft_id=info:pmid/&rfr_iscdi=true |