Colors of luminous bulges in cluster MS 1054-03 and field galaxies at redshifts z - 0.83

David C. Koo; Susmita Datta; Christopher N.A. Willmer; Luc Simard; Kim Vy Tran; I. M. Myungshin

doi:10.1086/498707

Colors of luminous bulges in cluster MS 1054-03 and field galaxies at redshifts z - 0.83

David C. Koo, Susmita Datta, Christopher N.A. Willmer, Luc Simard, Kim Vy Tran, I. M. Myungshin

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

Using Hubble Space Telescope images, we separate the bulgelike (dubbed "pbulge") and disklike ("pdisk") components of 71 galaxies in the rich cluster MS 1054-03 and of 21 in the field. Our key finding is that luminous pbulges are very red, with rest-frame U-B - 0.45, while predicted colors are bluer by 0.20 mag. Moreover, these very red colors appear to be independent of environment, pbulge luminosity, pdisk color, and pbulge fraction. These results challenge any model of hierarchical galaxy formation that predicts the colors of distant (z - 0.8) luminous field and cluster bulges will differ. Our findings also disagree with other claims that 30% to 50% of bright bulges and elliptical galaxies at z - 1 are very blue (U-B ≤ 0).

Original language	English (US)
Pages (from-to)	L5-L8
Journal	Astrophysical Journal
Volume	634
Issue number	1 II
DOIs	https://doi.org/10.1086/498707
State	Published - Nov 20 2005
Externally published	Yes

Keywords

Cosmology: observations
Galaxies: evolution
Galaxies: formation
Galaxies: fundamental parameters
Galaxies: photometry

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/498707

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@article{9e94257901b6413499a0fb8cc0b1b1d8,

title = "Colors of luminous bulges in cluster MS 1054-03 and field galaxies at redshifts z - 0.83",

abstract = "Using Hubble Space Telescope images, we separate the bulgelike (dubbed {"}pbulge{"}) and disklike ({"}pdisk{"}) components of 71 galaxies in the rich cluster MS 1054-03 and of 21 in the field. Our key finding is that luminous pbulges are very red, with rest-frame U-B - 0.45, while predicted colors are bluer by 0.20 mag. Moreover, these very red colors appear to be independent of environment, pbulge luminosity, pdisk color, and pbulge fraction. These results challenge any model of hierarchical galaxy formation that predicts the colors of distant (z - 0.8) luminous field and cluster bulges will differ. Our findings also disagree with other claims that 30% to 50% of bright bulges and elliptical galaxies at z - 1 are very blue (U-B ≤ 0).",

keywords = "Cosmology: observations, Galaxies: evolution, Galaxies: formation, Galaxies: fundamental parameters, Galaxies: photometry",

author = "Koo, {David C.} and Susmita Datta and Willmer, {Christopher N.A.} and Luc Simard and Tran, {Kim Vy} and Myungshin, {I. M.}",

year = "2005",

month = nov,

day = "20",

doi = "10.1086/498707",

language = "English (US)",

volume = "634",

pages = "L5--L8",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "1 II",

}

TY - JOUR

T1 - Colors of luminous bulges in cluster MS 1054-03 and field galaxies at redshifts z - 0.83

AU - Koo, David C.

AU - Datta, Susmita

AU - Willmer, Christopher N.A.

AU - Simard, Luc

AU - Tran, Kim Vy

AU - Myungshin, I. M.

PY - 2005/11/20

Y1 - 2005/11/20

N2 - Using Hubble Space Telescope images, we separate the bulgelike (dubbed "pbulge") and disklike ("pdisk") components of 71 galaxies in the rich cluster MS 1054-03 and of 21 in the field. Our key finding is that luminous pbulges are very red, with rest-frame U-B - 0.45, while predicted colors are bluer by 0.20 mag. Moreover, these very red colors appear to be independent of environment, pbulge luminosity, pdisk color, and pbulge fraction. These results challenge any model of hierarchical galaxy formation that predicts the colors of distant (z - 0.8) luminous field and cluster bulges will differ. Our findings also disagree with other claims that 30% to 50% of bright bulges and elliptical galaxies at z - 1 are very blue (U-B ≤ 0).

AB - Using Hubble Space Telescope images, we separate the bulgelike (dubbed "pbulge") and disklike ("pdisk") components of 71 galaxies in the rich cluster MS 1054-03 and of 21 in the field. Our key finding is that luminous pbulges are very red, with rest-frame U-B - 0.45, while predicted colors are bluer by 0.20 mag. Moreover, these very red colors appear to be independent of environment, pbulge luminosity, pdisk color, and pbulge fraction. These results challenge any model of hierarchical galaxy formation that predicts the colors of distant (z - 0.8) luminous field and cluster bulges will differ. Our findings also disagree with other claims that 30% to 50% of bright bulges and elliptical galaxies at z - 1 are very blue (U-B ≤ 0).

KW - Cosmology: observations

KW - Galaxies: evolution

KW - Galaxies: formation

KW - Galaxies: fundamental parameters

KW - Galaxies: photometry

UR - http://www.scopus.com/inward/record.url?scp=29144461638&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=29144461638&partnerID=8YFLogxK

U2 - 10.1086/498707

DO - 10.1086/498707

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VL - 634

SP - L5-L8

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 II

ER -

Colors of luminous bulges in cluster MS 1054-03 and field galaxies at redshifts z - 0.83

Abstract

Keywords

ASJC Scopus subject areas

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