Star formation in galaxies between redshifts of 0.7 and 1.8

A. M. Hopkins; A. J. Connolly; A. S. Szalay

Star formation in galaxies between redshifts of 0.7 and 1.8

A. M. Hopkins^*, A. J. Connolly, A. S. Szalay

^*Corresponding author for this work

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

86 Citations (Scopus)

Abstract

We present an analysis of the star formation rate in galaxies with redshifts in the range 0.7 < z < 1.8 using Near Infrared Camera and Multi-Object Spectrograph (NICMOS) grism spectral observations. We detect 163 galaxies in an area of ∼4.4 arcmin², 37 of which show possible Hα emission. We extend the observed Hα luminosity function (LF) in this redshift range to luminosities a factor of 2 fainter than earlier work and are consistent in the region of overlap. Using the Hα LF, we estimate a star formation rate (SFR) density in this redshift range of 0.166 M_⊙ yr^-1 Mpc^-3 (H₀ = 75 km s^-1 Mpc^-1), consistent with other estimates based on emission lines and supporting the order-of-magnitude increase in SFR density between z = 0 and z = 1. Our measurement of SFR density is a factor of ≈2-3 greater than that estimated from UV data, comparable to the factor observed locally, implying little evolution in the relative extinctions between UV and Hα out to z ≈ 1.3.

Original language	English
Pages (from-to)	2843-2850
Number of pages	8
Journal	Astronomical Journal
Volume	120
Issue number	6
Publication status	Published - Dec 2000
Externally published	Yes

Keywords

Galaxies: evolution
Galaxies: luminosity function, mass function
Galaxies: starburst

Cite this

@article{228967ab5bc34345bf9097a4246c240a,

title = "Star formation in galaxies between redshifts of 0.7 and 1.8",

abstract = "We present an analysis of the star formation rate in galaxies with redshifts in the range 0.7 < z < 1.8 using Near Infrared Camera and Multi-Object Spectrograph (NICMOS) grism spectral observations. We detect 163 galaxies in an area of ∼4.4 arcmin2, 37 of which show possible Hα emission. We extend the observed Hα luminosity function (LF) in this redshift range to luminosities a factor of 2 fainter than earlier work and are consistent in the region of overlap. Using the Hα LF, we estimate a star formation rate (SFR) density in this redshift range of 0.166 M⊙ yr-1 Mpc-3 (H0 = 75 km s-1 Mpc-1), consistent with other estimates based on emission lines and supporting the order-of-magnitude increase in SFR density between z = 0 and z = 1. Our measurement of SFR density is a factor of ≈2-3 greater than that estimated from UV data, comparable to the factor observed locally, implying little evolution in the relative extinctions between UV and Hα out to z ≈ 1.3.",

keywords = "Galaxies: evolution, Galaxies: luminosity function, mass function, Galaxies: starburst",

author = "Hopkins, {A. M.} and Connolly, {A. J.} and Szalay, {A. S.}",

year = "2000",

month = dec,

language = "English",

volume = "120",

pages = "2843--2850",

journal = "Astronomical Journal",

issn = "0004-6256",

publisher = "Institute of Physics",

number = "6",

}

TY - JOUR

T1 - Star formation in galaxies between redshifts of 0.7 and 1.8

AU - Hopkins, A. M.

AU - Connolly, A. J.

AU - Szalay, A. S.

PY - 2000/12

Y1 - 2000/12

N2 - We present an analysis of the star formation rate in galaxies with redshifts in the range 0.7 < z < 1.8 using Near Infrared Camera and Multi-Object Spectrograph (NICMOS) grism spectral observations. We detect 163 galaxies in an area of ∼4.4 arcmin2, 37 of which show possible Hα emission. We extend the observed Hα luminosity function (LF) in this redshift range to luminosities a factor of 2 fainter than earlier work and are consistent in the region of overlap. Using the Hα LF, we estimate a star formation rate (SFR) density in this redshift range of 0.166 M⊙ yr-1 Mpc-3 (H0 = 75 km s-1 Mpc-1), consistent with other estimates based on emission lines and supporting the order-of-magnitude increase in SFR density between z = 0 and z = 1. Our measurement of SFR density is a factor of ≈2-3 greater than that estimated from UV data, comparable to the factor observed locally, implying little evolution in the relative extinctions between UV and Hα out to z ≈ 1.3.

AB - We present an analysis of the star formation rate in galaxies with redshifts in the range 0.7 < z < 1.8 using Near Infrared Camera and Multi-Object Spectrograph (NICMOS) grism spectral observations. We detect 163 galaxies in an area of ∼4.4 arcmin2, 37 of which show possible Hα emission. We extend the observed Hα luminosity function (LF) in this redshift range to luminosities a factor of 2 fainter than earlier work and are consistent in the region of overlap. Using the Hα LF, we estimate a star formation rate (SFR) density in this redshift range of 0.166 M⊙ yr-1 Mpc-3 (H0 = 75 km s-1 Mpc-1), consistent with other estimates based on emission lines and supporting the order-of-magnitude increase in SFR density between z = 0 and z = 1. Our measurement of SFR density is a factor of ≈2-3 greater than that estimated from UV data, comparable to the factor observed locally, implying little evolution in the relative extinctions between UV and Hα out to z ≈ 1.3.

KW - Galaxies: evolution

KW - Galaxies: luminosity function, mass function

KW - Galaxies: starburst

UR - http://www.scopus.com/inward/record.url?scp=0007424219&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0007424219

SN - 0004-6256

VL - 120

SP - 2843

EP - 2850

JO - Astronomical Journal

JF - Astronomical Journal

IS - 6

ER -

Star formation in galaxies between redshifts of 0.7 and 1.8

Abstract

Keywords

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