THE EVOLUTION of the FAR-UV LUMINOSITY FUNCTION and STAR FORMATION RATE DENSITY of the CHANDRA DEEP FIELD SOUTH from z = 0.2 to 1.2 with SWIFT/UVOT

Lea M.Z. Hagen, Erik A. Hoversten, Caryl Gronwall, Christopher Wolf, Michael H. Siegel, Mathew Page, Alex Hagen

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We use deep Swift UV/Optical Telescope (UVOT) near-ultraviolet (1600-4000 Å) imaging of the Chandra Deep Field South to measure the rest-frame far-UV (FUV; 1500 Å) luminosity function (LF) in four redshift bins between z = 0.2 and 1.2. Our sample includes 730 galaxies with u < 24.1 mag. We use two methods to construct and fit the LFs: the traditional Vmax method with bootstrap errors, and a maximum likelihood estimator. We observe luminosity evolution such that M∗ fades by ∼2 mag from z ∼ 1 to z ∼ 0.3, implying that star formation activity was substantially higher at z ∼ 1 than today. We integrate our LFs to determine the FUV luminosity densities and star formation rate densities (SFRDs) from z = 0.2 to 1.2. We find evolution consistent with an increase proportional to (1 + z)1.9 out to z ∼ 1. Our luminosity densities and star formation rates are consistent with those found in the literature but are, on average, a factor of ∼2 higher than previous FUV measurements. In addition, we combine our UVOT data with the MUSYC survey to model the galaxies' ultraviolet-to-infrared spectral energy distributions and estimate the rest-frame FUV attenuation. We find that accounting for the attenuation increases the SFRDs by ∼1 dex across all four redshift bins.

Original languageEnglish (US)
Article number178
JournalAstrophysical Journal
Volume808
Issue number2
DOIs
StatePublished - Aug 1 2015

Fingerprint

star formation rate
luminosity
telescopes
attenuation
galaxies
spectral energy distribution
estimators
star formation
estimates
energy
rate
method

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

@article{34685e5053ab4f73b054e669bdcfe57a,
title = "THE EVOLUTION of the FAR-UV LUMINOSITY FUNCTION and STAR FORMATION RATE DENSITY of the CHANDRA DEEP FIELD SOUTH from z = 0.2 to 1.2 with SWIFT/UVOT",
abstract = "We use deep Swift UV/Optical Telescope (UVOT) near-ultraviolet (1600-4000 {\AA}) imaging of the Chandra Deep Field South to measure the rest-frame far-UV (FUV; 1500 {\AA}) luminosity function (LF) in four redshift bins between z = 0.2 and 1.2. Our sample includes 730 galaxies with u < 24.1 mag. We use two methods to construct and fit the LFs: the traditional Vmax method with bootstrap errors, and a maximum likelihood estimator. We observe luminosity evolution such that M∗ fades by ∼2 mag from z ∼ 1 to z ∼ 0.3, implying that star formation activity was substantially higher at z ∼ 1 than today. We integrate our LFs to determine the FUV luminosity densities and star formation rate densities (SFRDs) from z = 0.2 to 1.2. We find evolution consistent with an increase proportional to (1 + z)1.9 out to z ∼ 1. Our luminosity densities and star formation rates are consistent with those found in the literature but are, on average, a factor of ∼2 higher than previous FUV measurements. In addition, we combine our UVOT data with the MUSYC survey to model the galaxies' ultraviolet-to-infrared spectral energy distributions and estimate the rest-frame FUV attenuation. We find that accounting for the attenuation increases the SFRDs by ∼1 dex across all four redshift bins.",
author = "Hagen, {Lea M.Z.} and Hoversten, {Erik A.} and Caryl Gronwall and Christopher Wolf and Siegel, {Michael H.} and Mathew Page and Alex Hagen",
year = "2015",
month = "8",
day = "1",
doi = "10.1088/0004-637X/808/2/178",
language = "English (US)",
volume = "808",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "IOP Publishing Ltd.",
number = "2",

}

THE EVOLUTION of the FAR-UV LUMINOSITY FUNCTION and STAR FORMATION RATE DENSITY of the CHANDRA DEEP FIELD SOUTH from z = 0.2 to 1.2 with SWIFT/UVOT. / Hagen, Lea M.Z.; Hoversten, Erik A.; Gronwall, Caryl; Wolf, Christopher; Siegel, Michael H.; Page, Mathew; Hagen, Alex.

In: Astrophysical Journal, Vol. 808, No. 2, 178, 01.08.2015.

Research output: Contribution to journalArticle

TY - JOUR

T1 - THE EVOLUTION of the FAR-UV LUMINOSITY FUNCTION and STAR FORMATION RATE DENSITY of the CHANDRA DEEP FIELD SOUTH from z = 0.2 to 1.2 with SWIFT/UVOT

AU - Hagen, Lea M.Z.

AU - Hoversten, Erik A.

AU - Gronwall, Caryl

AU - Wolf, Christopher

AU - Siegel, Michael H.

AU - Page, Mathew

AU - Hagen, Alex

PY - 2015/8/1

Y1 - 2015/8/1

N2 - We use deep Swift UV/Optical Telescope (UVOT) near-ultraviolet (1600-4000 Å) imaging of the Chandra Deep Field South to measure the rest-frame far-UV (FUV; 1500 Å) luminosity function (LF) in four redshift bins between z = 0.2 and 1.2. Our sample includes 730 galaxies with u < 24.1 mag. We use two methods to construct and fit the LFs: the traditional Vmax method with bootstrap errors, and a maximum likelihood estimator. We observe luminosity evolution such that M∗ fades by ∼2 mag from z ∼ 1 to z ∼ 0.3, implying that star formation activity was substantially higher at z ∼ 1 than today. We integrate our LFs to determine the FUV luminosity densities and star formation rate densities (SFRDs) from z = 0.2 to 1.2. We find evolution consistent with an increase proportional to (1 + z)1.9 out to z ∼ 1. Our luminosity densities and star formation rates are consistent with those found in the literature but are, on average, a factor of ∼2 higher than previous FUV measurements. In addition, we combine our UVOT data with the MUSYC survey to model the galaxies' ultraviolet-to-infrared spectral energy distributions and estimate the rest-frame FUV attenuation. We find that accounting for the attenuation increases the SFRDs by ∼1 dex across all four redshift bins.

AB - We use deep Swift UV/Optical Telescope (UVOT) near-ultraviolet (1600-4000 Å) imaging of the Chandra Deep Field South to measure the rest-frame far-UV (FUV; 1500 Å) luminosity function (LF) in four redshift bins between z = 0.2 and 1.2. Our sample includes 730 galaxies with u < 24.1 mag. We use two methods to construct and fit the LFs: the traditional Vmax method with bootstrap errors, and a maximum likelihood estimator. We observe luminosity evolution such that M∗ fades by ∼2 mag from z ∼ 1 to z ∼ 0.3, implying that star formation activity was substantially higher at z ∼ 1 than today. We integrate our LFs to determine the FUV luminosity densities and star formation rate densities (SFRDs) from z = 0.2 to 1.2. We find evolution consistent with an increase proportional to (1 + z)1.9 out to z ∼ 1. Our luminosity densities and star formation rates are consistent with those found in the literature but are, on average, a factor of ∼2 higher than previous FUV measurements. In addition, we combine our UVOT data with the MUSYC survey to model the galaxies' ultraviolet-to-infrared spectral energy distributions and estimate the rest-frame FUV attenuation. We find that accounting for the attenuation increases the SFRDs by ∼1 dex across all four redshift bins.

UR - http://www.scopus.com/inward/record.url?scp=84942163476&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84942163476&partnerID=8YFLogxK

U2 - 10.1088/0004-637X/808/2/178

DO - 10.1088/0004-637X/808/2/178

M3 - Article

AN - SCOPUS:84942163476

VL - 808

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 2

M1 - 178

ER -