New Determinations of the UV Luminosity Functions from z similar to 9 to 2 Show a Remarkable Consistency with Halo Growth and a Constant Star Formation Efficiency
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New Determinations of the UV Luminosity Functions from z similar to 9 to 2 Show a Remarkable Consistency with Halo Growth and a Constant Star Formation Efficiency. / Bouwens, R. J.; Oesch, P. A.; Stefanon, M.; Illingworth, G.; Labbe, Geneviève M; Reddy, N.; Atek, H.; Montes, M.; Naidu, R.; Nanayakkara, T.; Nelson, E.; Wilkins, S.
I: Astronomical Journal, Bind 162, Nr. 2, 47, 02.08.2021.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - New Determinations of the UV Luminosity Functions from z similar to 9 to 2 Show a Remarkable Consistency with Halo Growth and a Constant Star Formation Efficiency
AU - Bouwens, R. J.
AU - Oesch, P. A.
AU - Stefanon, M.
AU - Illingworth, G.
AU - Labbe, Geneviève M
AU - Reddy, N.
AU - Atek, H.
AU - Montes, M.
AU - Naidu, R.
AU - Nanayakkara, T.
AU - Nelson, E.
AU - Wilkins, S.
PY - 2021/8/2
Y1 - 2021/8/2
N2 - Here we provide the most comprehensive determinations of the rest-frame UV luminosity function (LF) available to date with the Hubble Space Telescope (HST) at z similar to 2-9. Essentially all of the noncluster extragalactic legacy fields are utilized, including the Hubble Ultra Deep Field, the Hubble Frontier Fields parallel fields, and all five CANDELS fields, for a total survey area of 1136 arcmin(2). Our determinations include galaxies at z similar to 2-3 leveraging the deep HDUV, UVUDF, and ERS WFC3/UVIS observations available over an similar to 150 arcmin(2) area in the GOODS-North and GOODS-South regions. All together, our collective samples include >24,000 sources, >2.3x larger than previous selections with HST. We identify 5766, 6332, 7240, 3449, 1066, 601, 246, and 33 sources at z similar to 2, 3, 4, 5, 6, 7, 8, and 9, respectively. Combining our results with an earlier z similar to 10 LF determination by Oesch et al., we quantify the evolution of the UV LF. Our results indicate that there is (1) a smooth flattening of the faint-end slope alpha from alpha similar to -2.4 at z similar to 10 to alpha similar to -1.5 at z similar to 2, (2) minimal evolution in the characteristic luminosity M* at z >= 2.5, and (3) a monotonic increase in the normalization log(10) phi* from z similar to 10 to 2, which can be well described by a simple second-order polynomial, consistent with an "accelerated" evolution scenario. We find that each of these trends (from z similar to 10 to 2.5 at least) can be readily explained on the basis of the evolution of the halo mass function and a simple constant star formation efficiency model.
AB - Here we provide the most comprehensive determinations of the rest-frame UV luminosity function (LF) available to date with the Hubble Space Telescope (HST) at z similar to 2-9. Essentially all of the noncluster extragalactic legacy fields are utilized, including the Hubble Ultra Deep Field, the Hubble Frontier Fields parallel fields, and all five CANDELS fields, for a total survey area of 1136 arcmin(2). Our determinations include galaxies at z similar to 2-3 leveraging the deep HDUV, UVUDF, and ERS WFC3/UVIS observations available over an similar to 150 arcmin(2) area in the GOODS-North and GOODS-South regions. All together, our collective samples include >24,000 sources, >2.3x larger than previous selections with HST. We identify 5766, 6332, 7240, 3449, 1066, 601, 246, and 33 sources at z similar to 2, 3, 4, 5, 6, 7, 8, and 9, respectively. Combining our results with an earlier z similar to 10 LF determination by Oesch et al., we quantify the evolution of the UV LF. Our results indicate that there is (1) a smooth flattening of the faint-end slope alpha from alpha similar to -2.4 at z similar to 10 to alpha similar to -1.5 at z similar to 2, (2) minimal evolution in the characteristic luminosity M* at z >= 2.5, and (3) a monotonic increase in the normalization log(10) phi* from z similar to 10 to 2, which can be well described by a simple second-order polynomial, consistent with an "accelerated" evolution scenario. We find that each of these trends (from z similar to 10 to 2.5 at least) can be readily explained on the basis of the evolution of the halo mass function and a simple constant star formation efficiency model.
KW - ULTRA-DEEP FIELD
KW - LYMAN-BREAK GALAXIES
KW - HUBBLE FRONTIER FIELDS
KW - EARLY RELEASE SCIENCE
KW - FAINT-END SLOPE
KW - STELLAR MASS DENSITY
KW - BRIGHT END
KW - LY-ALPHA
KW - FORMING GALAXIES
KW - DUST OBSCURATION
U2 - 10.3847/1538-3881/abf83e
DO - 10.3847/1538-3881/abf83e
M3 - Journal article
VL - 162
JO - The Astronomical Journal
JF - The Astronomical Journal
SN - 0004-6256
IS - 2
M1 - 47
ER -
ID: 276380213