TY - JOUR
T1 - Emission-line galaxies from the hubble space telescope probing evolution and reionization spectroscopically (PEARS) grism survey. II. the complete sample
AU - Pirzkal, N.
AU - Rothberg, B.
AU - Ly, C.
AU - Malhotra, S.
AU - Rhoads, J.E.
AU - Grogin, N.A.
AU - Dahlén, T.
AU - Noeske, K.G.
AU - Meurer, Gerhardt
AU - Walsh, J.R.
AU - Hathi, N.P.
AU - Cohen, S.H.
AU - Bellini, A.
AU - Holwerda, B.W.
AU - Straughn, A.N.
AU - Mechtley, M.
AU - Windhorst, R.A.
PY - 2013
Y1 - 2013
N2 - We present a full analysis of the Probing Evolution And Reionization Spectroscopically (PEARS) slitess grism spectroscopic data obtained with the Advanced Camera for Surveys on board Hubble Space Telescope. PEARS covers fields within both the Great Observatories Origins Deep Survey (GOODS) North and South fields, making it ideal as a random survey of galaxies, as well as the availability of a wide variety of ancillary observations complemented by the spectroscopic results. Using the PEARS data, we are able to identify star-forming galaxies (SFGs) within the redshift volume 0 <z <1.5. Star-forming regions in the PEARS survey are pinpointed independently of the host galaxy. This method allows us to detect the presence of multiple emission-line regions (ELRs) within a single galaxy. We identified a total of 1162 Hα, [O III], and/or [O II] emission lines in the PEARS sample of 906 galaxies to a limiting flux of 10-18 erg s-1 cm -2. The ELRs have also been compared to the properties of the host galaxy, including morphology, luminosity, and mass. From this analysis, we find three key results: (1) the computed line luminosities show evidence of a flattening in the luminosity function with increasing redshift; (2) the star-forming systems show evidence of complex morphologies with star formation occurring predominantly within one effective (half-light) radius. However, the morphologies show no correlation with host stellar mass. (3) Also, the number density of SFGs with M* ≥ 109 M⊙ decreases by an order of magnitude at z ≤ 0.5 relative to the number at 0.5 <z <0.9, supporting the argument of galaxy downsizing. © 2013. The American Astronomical Society. All rights reserved.
AB - We present a full analysis of the Probing Evolution And Reionization Spectroscopically (PEARS) slitess grism spectroscopic data obtained with the Advanced Camera for Surveys on board Hubble Space Telescope. PEARS covers fields within both the Great Observatories Origins Deep Survey (GOODS) North and South fields, making it ideal as a random survey of galaxies, as well as the availability of a wide variety of ancillary observations complemented by the spectroscopic results. Using the PEARS data, we are able to identify star-forming galaxies (SFGs) within the redshift volume 0 <z <1.5. Star-forming regions in the PEARS survey are pinpointed independently of the host galaxy. This method allows us to detect the presence of multiple emission-line regions (ELRs) within a single galaxy. We identified a total of 1162 Hα, [O III], and/or [O II] emission lines in the PEARS sample of 906 galaxies to a limiting flux of 10-18 erg s-1 cm -2. The ELRs have also been compared to the properties of the host galaxy, including morphology, luminosity, and mass. From this analysis, we find three key results: (1) the computed line luminosities show evidence of a flattening in the luminosity function with increasing redshift; (2) the star-forming systems show evidence of complex morphologies with star formation occurring predominantly within one effective (half-light) radius. However, the morphologies show no correlation with host stellar mass. (3) Also, the number density of SFGs with M* ≥ 109 M⊙ decreases by an order of magnitude at z ≤ 0.5 relative to the number at 0.5 <z <0.9, supporting the argument of galaxy downsizing. © 2013. The American Astronomical Society. All rights reserved.
U2 - 10.1088/0004-637X/772/1/48
DO - 10.1088/0004-637X/772/1/48
M3 - Article
SN - 0004-637X
VL - 772
SP - 17pp
JO - The Astrophysical Journal
JF - The Astrophysical Journal
IS - 1
ER -