Recent star formation in high-redshift early-type galaxies: Insights from the rest-frame UV

S. Kaviraj; S. K. Yi; E. Gawiser; P. G. Van Dokkum; S. Khochfar; K. Schawinski; J. Silk

doi:10.1017/s174392130801764x

Recent star formation in high-redshift early-type galaxies: Insights from the rest-frame UV

S. Kaviraj, S. K. Yi, E. Gawiser, P. G. Van Dokkum, S. Khochfar, K. Schawinski, J. Silk

Research output: Contribution to journal › Article › peer-review

Abstract

We combine deep UBV RIzJK photometry from the MUSYC survey with redshifts from the COMBO-17 survey to study the rest-frame ultraviolet (UV) properties of 674 high-redshift (0.5 < z < 1) early-type galaxies, drawn from the Extended Chandra Deep Field South (E-CDFS). Galaxy morphologies are determined through visual inspection of Hubble Space Telescope (HST) images taken from the GEMS survey. We harness the sensitivity of the UV to young (<1 Gyrs old) stars to quantify the recent star formation history of the early-type population. We find compelling evidence that early-types of all luminosities form stars over the lifetime of the Universe, although the bulk of their star formation is already complete at high redshift. Luminous (23 < M(V) < 20.5) early-types form 10-15 percent of their mass after z = 1, while their less luminous (M(V) > 20.5) counterparts form 30-60 percent of their mass in the same redshift range.

Original language	English
Pages (from-to)	195-200
Number of pages	6
Journal	Proceedings of the International Astronomical Union
Volume	3
Issue number	S245
DOIs	https://doi.org/10.1017/s174392130801764x
Publication status	Published - 2007 Jul

All Science Journal Classification (ASJC) codes

Medicine (miscellaneous)
Astronomy and Astrophysics
Nutrition and Dietetics
Public Health, Environmental and Occupational Health
Space and Planetary Science

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@article{68b3eb20bf824ab79e9a60395bff8ee2,

title = "Recent star formation in high-redshift early-type galaxies: Insights from the rest-frame UV",

abstract = "We combine deep UBV RIzJK photometry from the MUSYC survey with redshifts from the COMBO-17 survey to study the rest-frame ultraviolet (UV) properties of 674 high-redshift (0.5 < z < 1) early-type galaxies, drawn from the Extended Chandra Deep Field South (E-CDFS). Galaxy morphologies are determined through visual inspection of Hubble Space Telescope (HST) images taken from the GEMS survey. We harness the sensitivity of the UV to young (<1 Gyrs old) stars to quantify the recent star formation history of the early-type population. We find compelling evidence that early-types of all luminosities form stars over the lifetime of the Universe, although the bulk of their star formation is already complete at high redshift. Luminous (23 < M(V) < 20.5) early-types form 10-15 percent of their mass after z = 1, while their less luminous (M(V) > 20.5) counterparts form 30-60 percent of their mass in the same redshift range.",

author = "S. Kaviraj and Yi, {S. K.} and E. Gawiser and {Van Dokkum}, {P. G.} and S. Khochfar and K. Schawinski and J. Silk",

year = "2007",

month = jul,

doi = "10.1017/s174392130801764x",

language = "English",

volume = "3",

pages = "195--200",

journal = "Proceedings of the International Astronomical Union",

issn = "1743-9213",

publisher = "Cambridge University Press",

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T2 - Insights from the rest-frame UV

AU - Kaviraj, S.

AU - Yi, S. K.

AU - Gawiser, E.

AU - Van Dokkum, P. G.

AU - Khochfar, S.

AU - Schawinski, K.

AU - Silk, J.

PY - 2007/7

Y1 - 2007/7

N2 - We combine deep UBV RIzJK photometry from the MUSYC survey with redshifts from the COMBO-17 survey to study the rest-frame ultraviolet (UV) properties of 674 high-redshift (0.5 < z < 1) early-type galaxies, drawn from the Extended Chandra Deep Field South (E-CDFS). Galaxy morphologies are determined through visual inspection of Hubble Space Telescope (HST) images taken from the GEMS survey. We harness the sensitivity of the UV to young (<1 Gyrs old) stars to quantify the recent star formation history of the early-type population. We find compelling evidence that early-types of all luminosities form stars over the lifetime of the Universe, although the bulk of their star formation is already complete at high redshift. Luminous (23 < M(V) < 20.5) early-types form 10-15 percent of their mass after z = 1, while their less luminous (M(V) > 20.5) counterparts form 30-60 percent of their mass in the same redshift range.

AB - We combine deep UBV RIzJK photometry from the MUSYC survey with redshifts from the COMBO-17 survey to study the rest-frame ultraviolet (UV) properties of 674 high-redshift (0.5 < z < 1) early-type galaxies, drawn from the Extended Chandra Deep Field South (E-CDFS). Galaxy morphologies are determined through visual inspection of Hubble Space Telescope (HST) images taken from the GEMS survey. We harness the sensitivity of the UV to young (<1 Gyrs old) stars to quantify the recent star formation history of the early-type population. We find compelling evidence that early-types of all luminosities form stars over the lifetime of the Universe, although the bulk of their star formation is already complete at high redshift. Luminous (23 < M(V) < 20.5) early-types form 10-15 percent of their mass after z = 1, while their less luminous (M(V) > 20.5) counterparts form 30-60 percent of their mass in the same redshift range.

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