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Evolution of the Frequency of Luminous (≥ \documentclass{aastex} \usepackage{amsbsy} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{bm} \usepackage{mathrsfs} \usepackage{pifont} \usepackage{stmaryrd} \usepackage{textcomp} \usepackage{portland,xspace} \usepackage{amsmath,amsxtra} \usepackage[OT2,OT1]{fontenc} \newcommand\cyr{ \renewcommand\rmdefault{wncyr} \renewcommand\sfdefault{wncyss} \renewcommand\encodingdefault{OT2} \normalfont \selectfont} \DeclareTextFontCommand{\textcyr}{\cyr} \pagestyle{empty} \DeclareMathSizes{10}{9}{7}{6} \begin{document} \landscape $L^{}_{V}$ \end{document} ) Close Galaxy Pairs at z < 1.2 in the COSMOS Field
Open accessAbstract
We measure the fraction of luminous galaxies in pairs at projected separations of 5-20 kpc out to z=1.2 in the COSMOS field using ACS images and photometric redshifts derived from an extensive multiwavelength dataset. Analysis of a complete sample of 106,188 galaxies more luminous than M_V=-19.8 (~ L_V*) in the redshift range 0.1 < z < 1.2 yields 1,749 galaxy pairs. These data are supplemented by a local z=0-0.1 value for the galaxy pair fraction derived from the Sloan Digital Sky Survey (SDSS). After statistically correcting the COSMOS pair sample for chance line-of-sight superpositions, the evolution in the pair fraction is fit by a power law \propto (1+z)^{n=3.1 \pm 0.1}. If this strongly evolving pair fraction continues out to higher redshift, ~ 50% of all luminous galaxies at z ~ 2 are in close pairs. This clearly signifies that galaxy mergers are a very significant and possibly dominant mechanism for galaxy evolution during the epoch of galaxy formation at z=1 to 3.
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Citations
Cited by
Dusty star-forming galaxies at high redshift
Casey, C. M., Narayanan, D., & Cooray, A. (2014) · Physics Reports · doi:10.1016/j.physrep.2014.02.009 · Cited by 800
Rodriguez-Gomez, V., Genel, S., Vogelsberger, M., Sijacki, D., Pillepich, A., Sales, L. V., Torrey, P., Snyder, G., Nelson, D., Springel, V., et al. (2015) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stv264 · Cited by 756
GALAXY STELLAR MASS ASSEMBLY BETWEEN 0.2 <z< 2 FROM THE S-COSMOS SURVEY
Ilbert, O., Salvato, M., Le Floc'h, E., Aussel, H., Capak, P., McCracken, H. J., Mobasher, B., Kartaltepe, J., Scoville, N., Sanders, D. B., et al. (2010) · The Astrophysical Journal · doi:10.1088/0004-637x/709/2/644 · Cited by 687
Self-citationSanders, D. B., Salvato, M., Aussel, H., Ilbert, O., Scoville, N., Surace, J. A., Frayer, D. T., Sheth, K., Helou, G., Brooke, T., et al. (2007) · The Astrophysical Journal Supplement Series · doi:10.1086/517885 · Cited by 621
Self-citationHopkins, P. F., Cox, T. J., Younger, J. D., & Hernquist, L. (2009) · The Astrophysical Journal · doi:10.1088/0004-637x/691/2/1168 · Cited by 543
Metadata
- Authors
- Kartaltepe, J. S., Sanders, D. B., Scoville, N. Z., Calzetti, D., Capak, P., Koekemoer, A., Mobasher, B., Murayama, T., Salvato, M., Sasaki, S. S., & Taniguchi, Y.
- Venue
- The Astrophysical Journal Supplement Series
- Publisher
- American Astronomical Society
- Published
- 2007-09
- Volume
- 172
- Issue
- 1
- Pages
- 320-328
- ISSN
- 0067-0049 (ISSN-L)
- 1538-4365
- OpenAlex
- W4301484562
- Cited by
- 173
- References
- 0
- FWCI
- 11.88
- Type
- journal article
- Language
- en
- Open access
- green
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- CoChat. (2026). Citation check: Evolution of the Frequency of Luminous (≥ \documentclass{aastex} \usepackage{amsbsy} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{bm} \usepackage{mathrsfs} \usepackage{pifont} \usepackage{stmaryrd} \usepackage{textcomp} \usepackage{portland,xspace} \usepackage{amsmath,amsxtra} \usepackage[OT2,OT1]{fontenc} \newcommand\cyr{ \renewcommand\rmdefault{wncyr} \renewcommand\sfdefault{wncyss} \renewcommand\encodingdefault{OT2} \normalfont \selectfont} \DeclareTextFontCommand{\textcyr}{\cyr} \pagestyle{empty} \DeclareMathSizes{10}{9}{7}{6} \begin{document} \landscape $L^{}_{V}$ \end{document} ) Close Galaxy Pairs at z < 1.2 in the COSMOS Field. https://app.cochat.ai/papers/10.1086/519953
- The paper
- Kartaltepe, J. S., Sanders, D. B., Scoville, N. Z., Calzetti, D., Capak, P., Koekemoer, A., Mobasher, B., Murayama, T., Salvato, M., Sasaki, S. S., & Taniguchi, Y. (2007). Evolution of the Frequency of Luminous (≥ \documentclass{aastex} \usepackage{amsbsy} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{bm} \usepackage{mathrsfs} \usepackage{pifont} \usepackage{stmaryrd} \usepackage{textcomp} \usepackage{portland,xspace} \usepackage{amsmath,amsxtra} \usepackage[OT2,OT1]{fontenc} \newcommand\cyr{ \renewcommand\rmdefault{wncyr} \renewcommand\sfdefault{wncyss} \renewcommand\encodingdefault{OT2} \normalfont \selectfont} \DeclareTextFontCommand{\textcyr}{\cyr} \pagestyle{empty} \DeclareMathSizes{10}{9}{7}{6} \begin{document} \landscape $L^{}_{V}$ \end{document} ) Close Galaxy Pairs at z < 1.2 in the COSMOS Field. The Astrophysical Journal Supplement Series. https://doi.org/10.1086/519953
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
