Early-type galaxies at z ∼ 1.3. IV. Scaling relations in different environments

A. Raichoor, S. Mei, S. A. Stanford, B. P. Holden, F. Nakata, P. Rosati, F. Shankar, M. Tanaka, H. Ford, M. Huertas-Company, G. Illingworth, T. Kodama, M. Postman, A. Rettura, J. P. Blakeslee, R. Demarco, Myung Kook Jee, R. L. White

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Abstract

We present the Kormendy and mass-size relations (MSR) for early-type galaxies (ETGs) as a function of environment at z ∼ 1.3. Our sample includes 76 visually classified ETGs with masses 1010 < M/M Ȯ < 1011.5, selected in the Lynx supercluster and in the Great Observatories Origins Deep Survey/Chandra Deep Field South field; 31 ETGs in clusters, 18 in groups, and 27 in the field, all with multi-wavelength photometry and Hubble Space Telescope/Advanced Camera for Surveys observations. The Kormendy relation, in place at z 1.3, does not depend on the environment. The MSR reveals that ETGs overall appear to be more compact in denser environments: cluster ETGs have sizes on average around 30%-50% smaller than those of the local universe and a distribution with a smaller scatter, whereas field ETGs show an MSR with a similar distribution to the local one. Our results imply that (1) the MSR in the field did not evolve overall from z ∼ 1.3 to present; this is interesting and in contrast to the trend found at higher masses from previous works; (2) in denser environments, either ETGs have increased in size by 30%-50% on average and spread their distributions, or more ETGs have been formed within the dense environment from non-ETG progenitors, or larger galaxies have been accreted to a pristine compact population to reproduce the MSR observed in the local universe. Our results are driven by galaxies with masses M ≲ 2 × 1011 M Ȯ and those with masses M ∼ 1011 M Ȯ follow the same trends as that of the entire sample. Following the Valentinuzzi et al. definition of superdense ETGs, ∼ 35%-45% of our cluster sample is made up of superdense ETGs.

Original languageEnglish
Article number130
JournalAstrophysical Journal
Volume745
Issue number2
DOIs
Publication statusPublished - 2012 Feb 1

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galaxies
scaling
universe
trends
observatory
Hubble Space Telescope
wavelength
photometry
observatories
cameras
distribution
wavelengths

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Raichoor, A., Mei, S., Stanford, S. A., Holden, B. P., Nakata, F., Rosati, P., ... White, R. L. (2012). Early-type galaxies at z ∼ 1.3. IV. Scaling relations in different environments. Astrophysical Journal, 745(2), [130]. https://doi.org/10.1088/0004-637X/745/2/130
Raichoor, A. ; Mei, S. ; Stanford, S. A. ; Holden, B. P. ; Nakata, F. ; Rosati, P. ; Shankar, F. ; Tanaka, M. ; Ford, H. ; Huertas-Company, M. ; Illingworth, G. ; Kodama, T. ; Postman, M. ; Rettura, A. ; Blakeslee, J. P. ; Demarco, R. ; Jee, Myung Kook ; White, R. L. / Early-type galaxies at z ∼ 1.3. IV. Scaling relations in different environments. In: Astrophysical Journal. 2012 ; Vol. 745, No. 2.
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Raichoor, A, Mei, S, Stanford, SA, Holden, BP, Nakata, F, Rosati, P, Shankar, F, Tanaka, M, Ford, H, Huertas-Company, M, Illingworth, G, Kodama, T, Postman, M, Rettura, A, Blakeslee, JP, Demarco, R, Jee, MK & White, RL 2012, 'Early-type galaxies at z ∼ 1.3. IV. Scaling relations in different environments', Astrophysical Journal, vol. 745, no. 2, 130. https://doi.org/10.1088/0004-637X/745/2/130

Early-type galaxies at z ∼ 1.3. IV. Scaling relations in different environments. / Raichoor, A.; Mei, S.; Stanford, S. A.; Holden, B. P.; Nakata, F.; Rosati, P.; Shankar, F.; Tanaka, M.; Ford, H.; Huertas-Company, M.; Illingworth, G.; Kodama, T.; Postman, M.; Rettura, A.; Blakeslee, J. P.; Demarco, R.; Jee, Myung Kook; White, R. L.

In: Astrophysical Journal, Vol. 745, No. 2, 130, 01.02.2012.

Research output: Contribution to journalArticle

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AU - Rosati, P.

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AU - Kodama, T.

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AU - Jee, Myung Kook

AU - White, R. L.

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Raichoor A, Mei S, Stanford SA, Holden BP, Nakata F, Rosati P et al. Early-type galaxies at z ∼ 1.3. IV. Scaling relations in different environments. Astrophysical Journal. 2012 Feb 1;745(2). 130. https://doi.org/10.1088/0004-637X/745/2/130