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LoCuSS: THE SLOW QUENCHING OF STAR FORMATION IN CLUSTER GALAXIES AND THE NEED FOR PRE-PROCESSING

https://hiroshima.repo.nii.ac.jp/records/2008897
https://hiroshima.repo.nii.ac.jp/records/2008897
1f050c65-5160-4ffb-9935-9f1ccef462ab
名前 / ファイル ライセンス アクション
ApJ_806_101.pdf ApJ_806_101.pdf (3.9 MB)
Item type デフォルトアイテムタイプ_(フル)(1)
公開日 2023-03-18
タイトル
タイトル LoCuSS: THE SLOW QUENCHING OF STAR FORMATION IN CLUSTER GALAXIES AND THE NEED FOR PRE-PROCESSING
言語 en
作成者 Haines, C. P.

× Haines, C. P.

en Haines, C. P.

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Pereira, M. J.

× Pereira, M. J.

en Pereira, M. J.

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Smith, G. P.

× Smith, G. P.

en Smith, G. P.

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Egami, E.

× Egami, E.

en Egami, E.

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Babul, A.

× Babul, A.

en Babul, A.

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Finoguenov, A.

× Finoguenov, A.

en Finoguenov, A.

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Ziparo, F.

× Ziparo, F.

en Ziparo, F.

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McGee, S. L.

× McGee, S. L.

en McGee, S. L.

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Rawle, T. D.

× Rawle, T. D.

en Rawle, T. D.

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岡部, 信広

× 岡部, 信広

ja 岡部, 信広

en Okabe, Nobuhiro

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Moran, S. M.

× Moran, S. M.

en Moran, S. M.

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アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
権利情報
権利情報 © 2015. The American Astronomical Society. All rights reserved.
主題
主題Scheme Other
主題 galaxies: active – galaxies: clusters: general – galaxies: evolution – galaxies: stellar content
主題
主題Scheme NDC
主題 440
内容記述
内容記述 We present a study of the spatial distribution and kinematics of star-forming galaxies in 30 massive clusters at 0.15 < z < 0.30, combining wide-field Spitzer 24 μm and GALEX near-ultraviolet imaging with highly complete spectroscopy of cluster members. The fraction (fSF) of star-forming cluster galaxies rises steadily with clustercentric radius, increasing fivefold by 2r_200, but remains well below field values even at 3r_200. This suppression of star formation at large radii cannot be reproduced by models in which star formation is quenched in infalling field galaxies only once they pass within r_200 of the cluster, but is consistent with some of them being first pre-processed within galaxy groups. Despite the increasing fSF-radius trend, the surface density of star-forming galaxies actually declines steadily with radius, falling ∼15× from the core to 2r_200. This requires star formation to survive within recently accreted spirals for 2–3 Gyr to build up the apparent over-density of star-forming galaxies within clusters. The velocity dispersion profile of the star-forming galaxy population shows a sharp peak of 1.44 σ_ν at 0.3r_500, and is 10%–35% higher than that of the inactive cluster members at all cluster-centric radii, while their velocity distribution shows a flat, top-hat profile within r_500. All of these results are consistent with star-forming cluster galaxies being an infalling population, but one that must also survive ∼0.5–2 Gyr beyond passing within r_200. By comparing the observed distribution of star-forming galaxies in the stacked caustic diagram with predictions from the Millennium simulation, we obtain a best-fit model in which star formation rates decline exponentially on quenching timescales of 1.73 ± 0.25 Gyr upon accretion into the cluster.
言語 en
内容記述
内容記述タイプ Other
内容記述 C.P.H. was funded by CONICYT Anillo project ACT-1122. G.P.S. acknowledges support from the Royal Society. F.Z. and G.P.S. acknowledge support from the Science and Technology Facilities Council. We acknowledge NASA funding for this project under the Spitzer program GO:40872. This work was supported in part by the National Science Foundation under grant No. AST-1211349. The Millennium simulation databases used in this paper and the web application providing online access to them were constructed as part of the activities of the German Astrophysical Virtual Observatory.
出版者
出版者 IOP Publishing
言語
言語 eng
資源タイプ
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
資源タイプ journal article
出版タイプ
出版タイプ VoR
出版タイプResource http://purl.org/coar/version/c_970fb48d4fbd8a85
関連情報
識別子タイプ DOI
関連識別子 10.1088/0004-637X/806/1/101
関連情報
識別子タイプ DOI
関連識別子 https://doi.org/10.1088/0004-637X/806/1/101
収録物識別子
収録物識別子タイプ ISSN
収録物識別子 0004-637X
収録物識別子
収録物識別子タイプ ISSN
収録物識別子 1538-4357
収録物識別子
収録物識別子タイプ NCID
収録物識別子 AA00553253
開始ページ
開始ページ 101
書誌情報 The Astrophysical Journal
The Astrophysical Journal

巻 806, 号 1, p. 101, 発行日 2015-06-10
旧ID 47045
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