The DEEP2 galaxy Redshift Survey: Evolution of close galaxy pairs and major-merger rates up to z ̃ 1.2

Lihwai Lin; David C. Koo; Christopher N.A. Willmer; David R. Patton; Christopher J. Conselice; Renbin Yan; Alison L. Coil; Michael C. Cooper; Marc Davis; S. M. Faber; Brian F. Gerke; Puragra Guhathakurta; Jeffrey A. Newman

doi:10.1086/427183

The DEEP2 galaxy Redshift Survey: Evolution of close galaxy pairs and major-merger rates up to z ̃ 1.2

Lihwai Lin, David C. Koo, Christopher N.A. Willmer, David R. Patton, Christopher J. Conselice, Renbin Yan, Alison L. Coil, Michael C. Cooper, Marc Davis, S. M. Faber, Brian F. Gerke, Puragra Guhathakurta, Jeffrey A. Newman

Research output: Contribution to journal › Review article › peer-review

215 Scopus citations

Abstract

We derive the close, kinematic pair fraction and merger rate up to redshift z ̃ 1.2 from the initial data of the DEEP2 Redshift Survey. Assuming a mild luminosity evolution, the number of companions per luminous galaxy is found to evolve as (1 + z)^m, with m = 0.51 ± 0.28; assuming no evolution, m = 1.60 ± 0.29. Our results imply that only 9% of present-day L* galaxies have undergone major mergers since z ̃ 1.2 and that the average major merger rate is about 4 x 10^-4 h³ Mpc ^-3 Gyr^-1 for z ̃ 0.5-1.2. Most previous studies have yielded higher values.

Original language	English (US)
Pages (from-to)	L9-L12
Journal	Astrophysical Journal
Volume	617
Issue number	1 II
DOIs	https://doi.org/10.1086/427183
State	Published - Dec 10 2004
Externally published	Yes

Keywords

Galaxies: evolution
Galaxies: interactions
Large-scale structure of universe

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/427183

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@article{335eab14c0264773b46b30431132a68c,

title = "The DEEP2 galaxy Redshift Survey: Evolution of close galaxy pairs and major-merger rates up to z{\~ } 1.2",

abstract = "We derive the close, kinematic pair fraction and merger rate up to redshift z{\~ } 1.2 from the initial data of the DEEP2 Redshift Survey. Assuming a mild luminosity evolution, the number of companions per luminous galaxy is found to evolve as (1 + z)m, with m = 0.51 ± 0.28; assuming no evolution, m = 1.60 ± 0.29. Our results imply that only 9% of present-day L* galaxies have undergone major mergers since z{\~ } 1.2 and that the average major merger rate is about 4 x 10-4 h3 Mpc -3 Gyr-1 for z{\~ } 0.5-1.2. Most previous studies have yielded higher values.",

keywords = "Galaxies: evolution, Galaxies: interactions, Large-scale structure of universe",

author = "Lihwai Lin and Koo, {David C.} and Willmer, {Christopher N.A.} and Patton, {David R.} and Conselice, {Christopher J.} and Renbin Yan and Coil, {Alison L.} and Cooper, {Michael C.} and Marc Davis and Faber, {S. M.} and Gerke, {Brian F.} and Puragra Guhathakurta and Newman, {Jeffrey A.}",

year = "2004",

month = dec,

day = "10",

doi = "10.1086/427183",

language = "English (US)",

volume = "617",

pages = "L9--L12",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "1 II",

}

TY - JOUR

T1 - The DEEP2 galaxy Redshift Survey

T2 - Evolution of close galaxy pairs and major-merger rates up to z ̃ 1.2

AU - Lin, Lihwai

AU - Koo, David C.

AU - Willmer, Christopher N.A.

AU - Patton, David R.

AU - Conselice, Christopher J.

AU - Yan, Renbin

AU - Coil, Alison L.

AU - Cooper, Michael C.

AU - Davis, Marc

AU - Faber, S. M.

AU - Gerke, Brian F.

AU - Guhathakurta, Puragra

AU - Newman, Jeffrey A.

PY - 2004/12/10

Y1 - 2004/12/10

N2 - We derive the close, kinematic pair fraction and merger rate up to redshift z ̃ 1.2 from the initial data of the DEEP2 Redshift Survey. Assuming a mild luminosity evolution, the number of companions per luminous galaxy is found to evolve as (1 + z)m, with m = 0.51 ± 0.28; assuming no evolution, m = 1.60 ± 0.29. Our results imply that only 9% of present-day L* galaxies have undergone major mergers since z ̃ 1.2 and that the average major merger rate is about 4 x 10-4 h3 Mpc -3 Gyr-1 for z ̃ 0.5-1.2. Most previous studies have yielded higher values.

AB - We derive the close, kinematic pair fraction and merger rate up to redshift z ̃ 1.2 from the initial data of the DEEP2 Redshift Survey. Assuming a mild luminosity evolution, the number of companions per luminous galaxy is found to evolve as (1 + z)m, with m = 0.51 ± 0.28; assuming no evolution, m = 1.60 ± 0.29. Our results imply that only 9% of present-day L* galaxies have undergone major mergers since z ̃ 1.2 and that the average major merger rate is about 4 x 10-4 h3 Mpc -3 Gyr-1 for z ̃ 0.5-1.2. Most previous studies have yielded higher values.

KW - Galaxies: evolution

KW - Galaxies: interactions

KW - Large-scale structure of universe

UR - http://www.scopus.com/inward/record.url?scp=19944426353&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=19944426353&partnerID=8YFLogxK

U2 - 10.1086/427183

DO - 10.1086/427183

M3 - Review article

AN - SCOPUS:19944426353

SN - 0004-637X

VL - 617

SP - L9-L12

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 II

ER -

The DEEP2 galaxy Redshift Survey: Evolution of close galaxy pairs and major-merger rates up to z ̃ 1.2

Abstract

Keywords

ASJC Scopus subject areas

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