Kameswara Bharadwaj Mantha
Major merging history in CANDELS. I. Evolution of the incidence of massive galaxy–galaxy pairs from z = 3 to z ∼ 0
Mantha, Kameswara Bharadwaj; McIntosh, Daniel H.; Brennan, Ryan; Ferguson, Henry C.; Kodra, Dritan; Newman, Jeffrey A.; Rafelski, Marc; Somerville, Rachel S.; Conselice, Christopher J.; Cook, Joshua S.; Hathi, Nimish P.; Koo, David C.; Lotz, Jennifer M.; Simmons, Brooke D.; Straughn, Amber N.; Snyder, Gregory F.; Wuyts, Stijn; Bell, Eric F; Dekel, Avishai; Kartaltepe, Jeyhan; Kocevski, Dale D.; Koekemoer, Anton M.; Lee, Seong-Kook; Lucas, Ray A.; Pacifici, Camilla; Peth, Michael A.; Barro, Guillermo; Dahlen, Tomas; Finkelstein, Steven L.; Fontana, Adriano; Galametz, Audrey; Grogin, Norman A.; Guo, Yicheng; Mobasher, Bahram; Nayyeri, Hooshang; P�rez-Gonz�lez, Pablo G.; Pforr, Janine; Santini, Paola; Stefanon, Mauro; Wiklind, Tommy
Authors
Daniel H. McIntosh
Ryan Brennan
Henry C. Ferguson
Dritan Kodra
Jeffrey A. Newman
Marc Rafelski
Rachel S. Somerville
Christopher J. Conselice
Joshua S. Cook
Nimish P. Hathi
David C. Koo
Jennifer M. Lotz
Brooke D. Simmons
Amber N. Straughn
Gregory F. Snyder
Stijn Wuyts
Eric F Bell
Avishai Dekel
Jeyhan Kartaltepe
Dale D. Kocevski
Anton M. Koekemoer
Seong-Kook Lee
Ray A. Lucas
Camilla Pacifici
Michael A. Peth
Guillermo Barro
Tomas Dahlen
Steven L. Finkelstein
Adriano Fontana
Audrey Galametz
Norman A. Grogin
Yicheng Guo
Bahram Mobasher
Hooshang Nayyeri
Pablo G. P�rez-Gonz�lez
Janine Pforr
Paola Santini
Mauro Stefanon
Tommy Wiklind
Abstract
The rate of major galaxy–galaxy merging is theoretically predicted to steadily increase with redshift during the peak epoch of massive galaxy development (1 ≤ z ≤ 3). We use close-pair statistics to objectively study the incidence of massive galaxies (stellar M1 > 2 × 1010 M⊙) hosting major companions (1 ≤ M1/M2 ≤ 4; i.e. 4:1) companions at z > 1. We show that these evolutionary trends are statistically robust to changes in companion proximity. We find disagreements between published results are resolved when selection criteria are closely matched. If we compute merger rates using constant fraction-to-rate conversion factors (Cmerg,pair = 0.6 and Tobs,pair = 0.65 Gyr), we find that MR rates disagree with theoretical predictions at z > 1.5. Instead, if we use an evolving Tobs,pair(z) ∝ (1 + z)−2 from Snyder et al., our MR-based rates agree with theory at 0 < z < 3. Our analysis underscores the need for detailed calibration of Cmerg,pair and Tobs,pair as a function of redshift, mass, and companion selection criteria to better constrain the empirical major merger history.
Journal Article Type | Article |
---|---|
Acceptance Date | Dec 13, 2017 |
Online Publication Date | Dec 20, 2017 |
Publication Date | Apr 1, 2018 |
Deposit Date | May 14, 2018 |
Publicly Available Date | May 14, 2018 |
Journal | Monthly Notices of the Royal Astronomical Society |
Print ISSN | 0035-8711 |
Electronic ISSN | 1365-2966 |
Publisher | Oxford University Press |
Peer Reviewed | Peer Reviewed |
Volume | 475 |
Issue | 2 |
DOI | https://doi.org/10.1093/mnras/stx3260 |
Keywords | galaxies: evolution, galaxies: high-redshift, galaxies: interactions, galaxies: statistics |
Public URL | https://nottingham-repository.worktribe.com/output/922760 |
Publisher URL | https://doi.org/10.1093/mnras/stx3260 |
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