J/ApJ/796/64 Hβ and Lyα emitting galaxies at z∼2 (Ciardullo+, 2014)
Hubble Space Telescope emission line galaxies at z ∼ 2: the Lyα escape
fraction.
Ciardullo R., Zeimann G.R., Gronwall C., Gebhardt H., Schneider D.P.,
Hagen A., Malz A.I., Blanc G.A., Hill G.J., Drory N., Gawiser E.
<Astrophys. J., 796, 64 (2014)>
=2014ApJ...796...64C 2014ApJ...796...64C (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, IR ; Galaxies, photometry ; Redshifts
Keywords: cosmology: observations - galaxies: evolution - galaxies: formation -
galaxies: luminosity function, mass function
Abstract:
We compare the Hβ line strengths of 1.90<z<2.35 star-forming
galaxies observed with the near-IR grism of the Hubble Space Telescope
with ground-based measurements of Lyα from the HETDEX Pilot
Survey and narrow-band imaging. By examining the line ratios of 73
galaxies, we show that most star-forming systems at this epoch have a
Lyα escape fraction below ∼6%.
Description:
We have combined the data from four recent surveys: 3D-HST and AGHAST
(Brammer et al. 2012ApJS..200...13B 2012ApJS..200...13B; Weiner & the AGHAST Team
2014AAS...22322707W 2014AAS...22322707W), the Pilot Survey for HETDEX, the Hobby-Eberly
Telescope Dark Energy Experiment (HPS; Adams et al. 2011,
J/ApJS/192/5), and the 3727Å narrow-band observations of the
Chandra Deep Field South (CDF-S; Guaita et al. 2010ApJ...714..255G 2010ApJ...714..255G;
Ciardullo et al. 2012, J/ApJ/744/110). The first two of these studies
unambiguously measures total Hβ fluxes in the redshift range
1.90<z<2.35 via Wide Field Camera 3 (WFC3) grism observations with the
Hubble Space Telescope (HST); the latter two provide Lyα
measurements (or upper limits) for many of these same galaxies via
integral field spectroscopy and narrow-band imaging.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 88 87 Hβ and Lyα galaxy measurements
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See also:
II/261 : GOODS initial results (Giavalisco+, 2004)
J/AJ/126/539 : The Chandra Deep Fields North and South (Alexander+, 2003)
J/PASJ/58/313 : Lyα emitters in SUBARU Deep Field (Shimasaku+, 2006)
J/ApJ/667/79 : Lyα emission-line galaxies at z=3.1 (Gronwall+, 2007)
J/ApJ/680/1072 : Lyα-emitting galaxies at 0.2<z<0.35 (Deharveng+, 2008)
J/ApJS/176/301 : Subaru/XMM-Newton deep survey IV. (SXDS) (Ouchi+, 2008)
J/A+A/498/13 : Lyman-α emitters from redshifts z∼2-3 (Nilsson+, 2009)
J/ApJ/706/1364 : SINS survey of high-z galaxies (Forster Schreiber+, 2009)
J/ApJS/184/158 : Chandra COSMOS survey I. (Elvis+, 2009)
J/ApJ/711/928 : Low-redshift Lyα galaxies from GALEX (Cowie+, 2010)
J/A+A/531/A12 : Lyα radiation transfer models (Schaerer+, 2011)
J/ApJ/736/31 : HETDEX pilot survey. II. 1.9<z<3.8 LAEs (Blanc+, 2011)
J/ApJS/192/5 : HETDEX pilot survey: emission-line galaxies (Adams+, 2011)
J/ApJS/195/10 : The CDF-S survey: 4Ms source catalogs (Xue+, 2011)
J/ApJ/744/110 : LAE galaxies between 2.1=<z≤3.1 (Ciardullo+, 2012)
J/MNRAS/428/1128 : UDS/COSMOS HiZELS galaxies (Sobral+, 2013)
J/ApJ/783/119 : z∼1 Lyα emitters. I. 135 candidates from GALEX
(Wold+, 2014)
J/ApJS/214/24 : 3D-HST+CANDELS catalog (Skelton+, 2014)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Field Field (COSMOS, GOODS-N, or GOODS-S)
9- 10 I2 h RAh Hour of Right Ascension (J2000)
12- 13 I2 min RAm Minute of Right Ascension (J2000)
15- 19 F5.2 s RAs Second of Right Ascension (J2000)
21 A1 --- DE- Sign of the Declination (J2000)
22- 23 I2 deg DEd Degree of Declination (J2000)
25- 26 I2 arcmin DEm Arcminute of Declination (J2000)
28- 32 F5.2 arcsec DEs Arcsecond of Declination (J2000)
33- 37 F5.3 --- z [1.914/2.31] Redshift
39- 43 F5.2 --- beta [-2.65/0.52] Rest-frame UV continuum
power-law slope (1)
45- 47 A3 --- --- [±]
49- 52 F4.2 --- e_beta [0.01/2.73] Error on beta
53 A1 --- l_logFHb Limit flag on logFHb
54- 59 F6.2 [10-3W/m2] logFHb [-17.58/-16.09]? Log of the Hβ flux
(erg/cm2/s)
61- 63 A3 --- --- [±]
65- 68 F4.2 [10-3W/m2] e_logFHb [0.03/0.49]? Error on logFHb
70 A1 --- l_logFLya [<] Limit flag on logFLya
71- 76 F6.2 [10-3W/m2] logFLya [-16.69/-14.84]? Flux Lymanα
(erg/cm2/s)
78 A1 --- --- [-]
79- 82 F4.2 [10-3W/m2] e_logFLya [0.02/0.28]? Lower limit error on logFLya
84 A1 --- --- [+]
85- 88 F4.2 [10-3W/m2] E_logFLya [0.02/0.22]? Upper limit error on logFLya
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Note (1): Slope of the rest-frame UV continuum between 1250Å and 2600Å,
as derived from the deep multicolor photometry compiled and
homogenized by Skelton et al. (2014, J/ApJS/214/24).
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History:
From electronic version of the journal
(End) Marianne Brouty [CDS] 22-Feb-2017