Environmental effects on the star formation activity in galaxies at z ≃ 1.2 in the cosmos field

Y. Ideue; T. Nagao; Y. Taniguchi; Y. Shioya; T. Saito; T. Murayama; S. Sasaki; J. R. Trump; A. M. Koekemoer; H. Aussel; P. Capak; O. Ilbert; H. McCracken; B. Mobasher; M. Salvato; D. B. Sanders; N. Scoville

doi:10.1088/0004-637X/700/2/971

Environmental effects on the star formation activity in galaxies at z ≃ 1.2 in the cosmos field

Y. Ideue, T. Nagao, Y. Taniguchi, Y. Shioya, T. Saito, T. Murayama, S. Sasaki, J. R. Trump, A. M. Koekemoer, H. Aussel, P. Capak, O. Ilbert, H. McCracken, B. Mobasher, M. Salvato, D. B. Sanders, N. Scoville

SCI - Astronomy

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27 Citations (Scopus)

Abstract

We investigate the relation between the star formation activity in galaxies and environment at z ≃ 1.2 in the Cosmic Evolution Survey field, using the fraction of [O II] emitters and the local galaxy density. The fraction of [O II] emitters appears to be almost constant over the surface density of galaxies between 0.2 and 10 Mpc^-2. This trend is different from that seen in the local universe where the star formation activity is weaker in higher density regions. To understand this difference between z ∼ 1 and z ∼ 0, we study the fraction of non-isolated galaxies as a function of local galaxy density. We find that the fraction of non-isolated galaxies increases with increasing density. Our results suggest that the star formation in galaxies at z ∼ 1 is triggered by galaxy interaction and/or mergers.

Original language	English
Pages (from-to)	971-976
Number of pages	6
Journal	Astrophysical Journal
Volume	700
Issue number	2
DOIs	https://doi.org/10.1088/0004-637X/700/2/971
Publication status	Published - 2009

Keywords

Galaxies: evolution
Galaxies: formation
Galaxies: high-redshift
Galaxies: interactions

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10.1088/0004-637X/700/2/971

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Ideue, Y., Nagao, T., Taniguchi, Y., Shioya, Y., Saito, T., Murayama, T., Sasaki, S., Trump, J. R., Koekemoer, A. M., Aussel, H., Capak, P., Ilbert, O., McCracken, H., Mobasher, B., Salvato, M., Sanders, D. B., & Scoville, N. (2009). Environmental effects on the star formation activity in galaxies at z ≃ 1.2 in the cosmos field. Astrophysical Journal, 700(2), 971-976. https://doi.org/10.1088/0004-637X/700/2/971

@article{f64e2c6faabd4454b204bee24909ec93,

title = "Environmental effects on the star formation activity in galaxies at z ≃ 1.2 in the cosmos field",

abstract = "We investigate the relation between the star formation activity in galaxies and environment at z ≃ 1.2 in the Cosmic Evolution Survey field, using the fraction of [O II] emitters and the local galaxy density. The fraction of [O II] emitters appears to be almost constant over the surface density of galaxies between 0.2 and 10 Mpc-2. This trend is different from that seen in the local universe where the star formation activity is weaker in higher density regions. To understand this difference between z ∼ 1 and z ∼ 0, we study the fraction of non-isolated galaxies as a function of local galaxy density. We find that the fraction of non-isolated galaxies increases with increasing density. Our results suggest that the star formation in galaxies at z ∼ 1 is triggered by galaxy interaction and/or mergers.",

keywords = "Galaxies: evolution, Galaxies: formation, Galaxies: high-redshift, Galaxies: interactions",

author = "Y. Ideue and T. Nagao and Y. Taniguchi and Y. Shioya and T. Saito and T. Murayama and S. Sasaki and Trump, {J. R.} and Koekemoer, {A. M.} and H. Aussel and P. Capak and O. Ilbert and H. McCracken and B. Mobasher and M. Salvato and Sanders, {D. B.} and N. Scoville",

year = "2009",

doi = "10.1088/0004-637X/700/2/971",

language = "English",

volume = "700",

pages = "971--976",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "2",

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Ideue, Y, Nagao, T, Taniguchi, Y, Shioya, Y, Saito, T, Murayama, T, Sasaki, S, Trump, JR, Koekemoer, AM, Aussel, H, Capak, P, Ilbert, O, McCracken, H, Mobasher, B, Salvato, M, Sanders, DB & Scoville, N 2009, 'Environmental effects on the star formation activity in galaxies at z ≃ 1.2 in the cosmos field', Astrophysical Journal, vol. 700, no. 2, pp. 971-976. https://doi.org/10.1088/0004-637X/700/2/971

TY - JOUR

T1 - Environmental effects on the star formation activity in galaxies at z ≃ 1.2 in the cosmos field

AU - Ideue, Y.

AU - Nagao, T.

AU - Taniguchi, Y.

AU - Shioya, Y.

AU - Saito, T.

AU - Murayama, T.

AU - Sasaki, S.

AU - Trump, J. R.

AU - Koekemoer, A. M.

AU - Aussel, H.

AU - Capak, P.

AU - Ilbert, O.

AU - McCracken, H.

AU - Mobasher, B.

AU - Salvato, M.

AU - Sanders, D. B.

AU - Scoville, N.

PY - 2009

Y1 - 2009

N2 - We investigate the relation between the star formation activity in galaxies and environment at z ≃ 1.2 in the Cosmic Evolution Survey field, using the fraction of [O II] emitters and the local galaxy density. The fraction of [O II] emitters appears to be almost constant over the surface density of galaxies between 0.2 and 10 Mpc-2. This trend is different from that seen in the local universe where the star formation activity is weaker in higher density regions. To understand this difference between z ∼ 1 and z ∼ 0, we study the fraction of non-isolated galaxies as a function of local galaxy density. We find that the fraction of non-isolated galaxies increases with increasing density. Our results suggest that the star formation in galaxies at z ∼ 1 is triggered by galaxy interaction and/or mergers.

AB - We investigate the relation between the star formation activity in galaxies and environment at z ≃ 1.2 in the Cosmic Evolution Survey field, using the fraction of [O II] emitters and the local galaxy density. The fraction of [O II] emitters appears to be almost constant over the surface density of galaxies between 0.2 and 10 Mpc-2. This trend is different from that seen in the local universe where the star formation activity is weaker in higher density regions. To understand this difference between z ∼ 1 and z ∼ 0, we study the fraction of non-isolated galaxies as a function of local galaxy density. We find that the fraction of non-isolated galaxies increases with increasing density. Our results suggest that the star formation in galaxies at z ∼ 1 is triggered by galaxy interaction and/or mergers.

KW - Galaxies: evolution

KW - Galaxies: formation

KW - Galaxies: high-redshift

KW - Galaxies: interactions

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DO - 10.1088/0004-637X/700/2/971

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SN - 0004-637X

VL - 700

SP - 971

EP - 976

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

ER -

Environmental effects on the star formation activity in galaxies at z ≃ 1.2 in the cosmos field

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Keywords

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