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

218 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

Cite this

@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 - https://www.scopus.com/pages/publications/19944426353

UR - https://www.scopus.com/pages/publications/19944426353#tab=citedBy

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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