Evidence for spatially compact Lyα emission in z = 3.1 Lyα-emitting galaxies

Nicholas A. Bond, John J. Feldmeier, Ana Matković, Caryl Gronwall, Ciardullo Robin, Gawiser Eric

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

We present the results of a high spatial resolution study of the line emission in a sample of z = 3.1 Lyα-emitting galaxies (LAEs) in the Extended Chandra Deep Field-South. Of the eight objects with coverage in our HST/WFPC2 narrowband imaging, two have clear detections and two are barely detected (∼2 σ). The clear detections are within ∼0.5 kpc of the centroid of the corresponding rest-UV continuum source, suggesting that the line-emitting gas and young stars in LAEs are spatially coincident. The brightest object exhibits extended emission with a half-light radius of ∼1.5 kpc, but a stack of the remaining LAE surface brightness profiles is consistent with the WFPC2 point-spread function. This suggests that the Lyα emission in these objects originates from a compact (≲2 kpc) region and cannot be significantly more extended than the far-UV continuum emission (≲1 kpc). Comparing our WFPC2 photometry to previous ground-based measurements of their monochromatic fluxes, we find at 95% (99.7%) confidence that we cannot be missing more than 22% (32%) of the Lyα emission.

Original languageEnglish (US)
Pages (from-to)L200-L204
JournalAstrophysical Journal Letters
Volume716
Issue number2
DOIs
StatePublished - Jun 20 2010

Fingerprint

galaxies
continuums
ground-based measurement
point spread functions
centroids
photometry
narrowband
confidence
brightness
spatial resolution
stars
radii
high resolution
profiles
gases
gas
detection

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Bond, Nicholas A. ; Feldmeier, John J. ; Matković, Ana ; Gronwall, Caryl ; Robin, Ciardullo ; Eric, Gawiser. / Evidence for spatially compact Lyα emission in z = 3.1 Lyα-emitting galaxies. In: Astrophysical Journal Letters. 2010 ; Vol. 716, No. 2. pp. L200-L204.
@article{47000488dce7425c90305edf2464dff9,
title = "Evidence for spatially compact Lyα emission in z = 3.1 Lyα-emitting galaxies",
abstract = "We present the results of a high spatial resolution study of the line emission in a sample of z = 3.1 Lyα-emitting galaxies (LAEs) in the Extended Chandra Deep Field-South. Of the eight objects with coverage in our HST/WFPC2 narrowband imaging, two have clear detections and two are barely detected (∼2 σ). The clear detections are within ∼0.5 kpc of the centroid of the corresponding rest-UV continuum source, suggesting that the line-emitting gas and young stars in LAEs are spatially coincident. The brightest object exhibits extended emission with a half-light radius of ∼1.5 kpc, but a stack of the remaining LAE surface brightness profiles is consistent with the WFPC2 point-spread function. This suggests that the Lyα emission in these objects originates from a compact (≲2 kpc) region and cannot be significantly more extended than the far-UV continuum emission (≲1 kpc). Comparing our WFPC2 photometry to previous ground-based measurements of their monochromatic fluxes, we find at 95{\%} (99.7{\%}) confidence that we cannot be missing more than 22{\%} (32{\%}) of the Lyα emission.",
author = "Bond, {Nicholas A.} and Feldmeier, {John J.} and Ana Matković and Caryl Gronwall and Ciardullo Robin and Gawiser Eric",
year = "2010",
month = "6",
day = "20",
doi = "10.1088/2041-8205/716/2/L200",
language = "English (US)",
volume = "716",
pages = "L200--L204",
journal = "Astrophysical Journal Letters",
issn = "2041-8205",
publisher = "IOP Publishing Ltd.",
number = "2",

}

Evidence for spatially compact Lyα emission in z = 3.1 Lyα-emitting galaxies. / Bond, Nicholas A.; Feldmeier, John J.; Matković, Ana; Gronwall, Caryl; Robin, Ciardullo; Eric, Gawiser.

In: Astrophysical Journal Letters, Vol. 716, No. 2, 20.06.2010, p. L200-L204.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Evidence for spatially compact Lyα emission in z = 3.1 Lyα-emitting galaxies

AU - Bond, Nicholas A.

AU - Feldmeier, John J.

AU - Matković, Ana

AU - Gronwall, Caryl

AU - Robin, Ciardullo

AU - Eric, Gawiser

PY - 2010/6/20

Y1 - 2010/6/20

N2 - We present the results of a high spatial resolution study of the line emission in a sample of z = 3.1 Lyα-emitting galaxies (LAEs) in the Extended Chandra Deep Field-South. Of the eight objects with coverage in our HST/WFPC2 narrowband imaging, two have clear detections and two are barely detected (∼2 σ). The clear detections are within ∼0.5 kpc of the centroid of the corresponding rest-UV continuum source, suggesting that the line-emitting gas and young stars in LAEs are spatially coincident. The brightest object exhibits extended emission with a half-light radius of ∼1.5 kpc, but a stack of the remaining LAE surface brightness profiles is consistent with the WFPC2 point-spread function. This suggests that the Lyα emission in these objects originates from a compact (≲2 kpc) region and cannot be significantly more extended than the far-UV continuum emission (≲1 kpc). Comparing our WFPC2 photometry to previous ground-based measurements of their monochromatic fluxes, we find at 95% (99.7%) confidence that we cannot be missing more than 22% (32%) of the Lyα emission.

AB - We present the results of a high spatial resolution study of the line emission in a sample of z = 3.1 Lyα-emitting galaxies (LAEs) in the Extended Chandra Deep Field-South. Of the eight objects with coverage in our HST/WFPC2 narrowband imaging, two have clear detections and two are barely detected (∼2 σ). The clear detections are within ∼0.5 kpc of the centroid of the corresponding rest-UV continuum source, suggesting that the line-emitting gas and young stars in LAEs are spatially coincident. The brightest object exhibits extended emission with a half-light radius of ∼1.5 kpc, but a stack of the remaining LAE surface brightness profiles is consistent with the WFPC2 point-spread function. This suggests that the Lyα emission in these objects originates from a compact (≲2 kpc) region and cannot be significantly more extended than the far-UV continuum emission (≲1 kpc). Comparing our WFPC2 photometry to previous ground-based measurements of their monochromatic fluxes, we find at 95% (99.7%) confidence that we cannot be missing more than 22% (32%) of the Lyα emission.

UR - http://www.scopus.com/inward/record.url?scp=84874138727&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84874138727&partnerID=8YFLogxK

U2 - 10.1088/2041-8205/716/2/L200

DO - 10.1088/2041-8205/716/2/L200

M3 - Article

AN - SCOPUS:84874138727

VL - 716

SP - L200-L204

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

SN - 2041-8205

IS - 2

ER -