A multivariate analysis of galaxies in the Hubble Deep Field-North

Michael R. Corbin, Andrea Urban, Elizabeth Stobie, Rodger I Thompson, Glenn Schneider

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We use the ultraviolet and optical WFPC2 and near-infrared NICMOS images of the Hubble Deep Field-North to measure and statistically compare an array of parameters for over 250 of the galaxies it contains. These parameters include redshift, rest-frame visible asymmetry and concentration, bolometric luminosity, and extinction-corrected star formation rale. We find only one strong correlation, between bolometric luminosity and star formation rate, from which early-type galaxies noticeably deviate. When our asymmetry measurements are combined with those of a sample of nearby galaxies covering the full Hubble sequence, we find a weak correlation between redshift and rest-frame visible asymmetry, consistent with the qualitative evidence of galaxy morphological evolution from these and other deep Hubble Space Telescope images. The mean values of these asymmetry measurements show a monotonic increase with redshift interval over the range 0 ≲ z ≲ 2, increasing by a factor of approximately 3. If this trend is real, it suggests that galaxy morphological evolution within the last ∼ 70% of the Hubble time is a gradual process that is continuing through the present cosmological epoch. There is evidence that the dominant source of this evolution is the "minor" mergers of disk galaxies with smaller companions, which could also transform late-type spiral galaxies to early-type spiral galaxies. Interestingly, in contrast to local galaxies we find no correlations between galaxy star formation rate and either UV or visible asymmetry. This could arise if the star formation of high-redshift galaxies proceeds in episodes that are short (∼ 100 Myr) relative to the timescales over which galaxy mergers produce strong asymmetries (∼ 500 Myr), a result suggested by the high star formation rates of Lyman break galaxies. Subject headings: cosmology: observations - galaxies: evolution -galaxies: fundamental parameters -galaxies: structure.

Original languageEnglish (US)
Pages (from-to)23-36
Number of pages14
JournalAstrophysical Journal
Volume551
Issue number1 PART 1
StatePublished - Apr 10 2001

Fingerprint

multivariate analysis
asymmetry
galaxies
merger
star formation rate
cosmology
spiral galaxies
near infrared
star formation
transform
extinction
luminosity
timescale
disk galaxies
Hubble Space Telescope
rate
parameter
coverings
time measurement
intervals

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Corbin, M. R., Urban, A., Stobie, E., Thompson, R. I., & Schneider, G. (2001). A multivariate analysis of galaxies in the Hubble Deep Field-North. Astrophysical Journal, 551(1 PART 1), 23-36.

A multivariate analysis of galaxies in the Hubble Deep Field-North. / Corbin, Michael R.; Urban, Andrea; Stobie, Elizabeth; Thompson, Rodger I; Schneider, Glenn.

In: Astrophysical Journal, Vol. 551, No. 1 PART 1, 10.04.2001, p. 23-36.

Research output: Contribution to journalArticle

Corbin, MR, Urban, A, Stobie, E, Thompson, RI & Schneider, G 2001, 'A multivariate analysis of galaxies in the Hubble Deep Field-North', Astrophysical Journal, vol. 551, no. 1 PART 1, pp. 23-36.
Corbin MR, Urban A, Stobie E, Thompson RI, Schneider G. A multivariate analysis of galaxies in the Hubble Deep Field-North. Astrophysical Journal. 2001 Apr 10;551(1 PART 1):23-36.
Corbin, Michael R. ; Urban, Andrea ; Stobie, Elizabeth ; Thompson, Rodger I ; Schneider, Glenn. / A multivariate analysis of galaxies in the Hubble Deep Field-North. In: Astrophysical Journal. 2001 ; Vol. 551, No. 1 PART 1. pp. 23-36.
@article{5c4f984ebbfb4518ba4b4d293645367c,
title = "A multivariate analysis of galaxies in the Hubble Deep Field-North",
abstract = "We use the ultraviolet and optical WFPC2 and near-infrared NICMOS images of the Hubble Deep Field-North to measure and statistically compare an array of parameters for over 250 of the galaxies it contains. These parameters include redshift, rest-frame visible asymmetry and concentration, bolometric luminosity, and extinction-corrected star formation rale. We find only one strong correlation, between bolometric luminosity and star formation rate, from which early-type galaxies noticeably deviate. When our asymmetry measurements are combined with those of a sample of nearby galaxies covering the full Hubble sequence, we find a weak correlation between redshift and rest-frame visible asymmetry, consistent with the qualitative evidence of galaxy morphological evolution from these and other deep Hubble Space Telescope images. The mean values of these asymmetry measurements show a monotonic increase with redshift interval over the range 0 ≲ z ≲ 2, increasing by a factor of approximately 3. If this trend is real, it suggests that galaxy morphological evolution within the last ∼ 70{\%} of the Hubble time is a gradual process that is continuing through the present cosmological epoch. There is evidence that the dominant source of this evolution is the {"}minor{"} mergers of disk galaxies with smaller companions, which could also transform late-type spiral galaxies to early-type spiral galaxies. Interestingly, in contrast to local galaxies we find no correlations between galaxy star formation rate and either UV or visible asymmetry. This could arise if the star formation of high-redshift galaxies proceeds in episodes that are short (∼ 100 Myr) relative to the timescales over which galaxy mergers produce strong asymmetries (∼ 500 Myr), a result suggested by the high star formation rates of Lyman break galaxies. Subject headings: cosmology: observations - galaxies: evolution -galaxies: fundamental parameters -galaxies: structure.",
author = "Corbin, {Michael R.} and Andrea Urban and Elizabeth Stobie and Thompson, {Rodger I} and Glenn Schneider",
year = "2001",
month = "4",
day = "10",
language = "English (US)",
volume = "551",
pages = "23--36",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "IOP Publishing Ltd.",
number = "1 PART 1",

}

TY - JOUR

T1 - A multivariate analysis of galaxies in the Hubble Deep Field-North

AU - Corbin, Michael R.

AU - Urban, Andrea

AU - Stobie, Elizabeth

AU - Thompson, Rodger I

AU - Schneider, Glenn

PY - 2001/4/10

Y1 - 2001/4/10

N2 - We use the ultraviolet and optical WFPC2 and near-infrared NICMOS images of the Hubble Deep Field-North to measure and statistically compare an array of parameters for over 250 of the galaxies it contains. These parameters include redshift, rest-frame visible asymmetry and concentration, bolometric luminosity, and extinction-corrected star formation rale. We find only one strong correlation, between bolometric luminosity and star formation rate, from which early-type galaxies noticeably deviate. When our asymmetry measurements are combined with those of a sample of nearby galaxies covering the full Hubble sequence, we find a weak correlation between redshift and rest-frame visible asymmetry, consistent with the qualitative evidence of galaxy morphological evolution from these and other deep Hubble Space Telescope images. The mean values of these asymmetry measurements show a monotonic increase with redshift interval over the range 0 ≲ z ≲ 2, increasing by a factor of approximately 3. If this trend is real, it suggests that galaxy morphological evolution within the last ∼ 70% of the Hubble time is a gradual process that is continuing through the present cosmological epoch. There is evidence that the dominant source of this evolution is the "minor" mergers of disk galaxies with smaller companions, which could also transform late-type spiral galaxies to early-type spiral galaxies. Interestingly, in contrast to local galaxies we find no correlations between galaxy star formation rate and either UV or visible asymmetry. This could arise if the star formation of high-redshift galaxies proceeds in episodes that are short (∼ 100 Myr) relative to the timescales over which galaxy mergers produce strong asymmetries (∼ 500 Myr), a result suggested by the high star formation rates of Lyman break galaxies. Subject headings: cosmology: observations - galaxies: evolution -galaxies: fundamental parameters -galaxies: structure.

AB - We use the ultraviolet and optical WFPC2 and near-infrared NICMOS images of the Hubble Deep Field-North to measure and statistically compare an array of parameters for over 250 of the galaxies it contains. These parameters include redshift, rest-frame visible asymmetry and concentration, bolometric luminosity, and extinction-corrected star formation rale. We find only one strong correlation, between bolometric luminosity and star formation rate, from which early-type galaxies noticeably deviate. When our asymmetry measurements are combined with those of a sample of nearby galaxies covering the full Hubble sequence, we find a weak correlation between redshift and rest-frame visible asymmetry, consistent with the qualitative evidence of galaxy morphological evolution from these and other deep Hubble Space Telescope images. The mean values of these asymmetry measurements show a monotonic increase with redshift interval over the range 0 ≲ z ≲ 2, increasing by a factor of approximately 3. If this trend is real, it suggests that galaxy morphological evolution within the last ∼ 70% of the Hubble time is a gradual process that is continuing through the present cosmological epoch. There is evidence that the dominant source of this evolution is the "minor" mergers of disk galaxies with smaller companions, which could also transform late-type spiral galaxies to early-type spiral galaxies. Interestingly, in contrast to local galaxies we find no correlations between galaxy star formation rate and either UV or visible asymmetry. This could arise if the star formation of high-redshift galaxies proceeds in episodes that are short (∼ 100 Myr) relative to the timescales over which galaxy mergers produce strong asymmetries (∼ 500 Myr), a result suggested by the high star formation rates of Lyman break galaxies. Subject headings: cosmology: observations - galaxies: evolution -galaxies: fundamental parameters -galaxies: structure.

UR - http://www.scopus.com/inward/record.url?scp=0035836909&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035836909&partnerID=8YFLogxK

M3 - Article

VL - 551

SP - 23

EP - 36

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 1 PART 1

ER -