The Low-redshift Lyman Continuum Survey. II. New Insights into LyC Diagnostics.
FLURY S.R., JASKOT A.E., FERGUSON H.C., WORSECK G., MAKAN K., CHISHOLM J., SALDANA-LOPEZ A., SCHAERER D., McCANDLISS S.R., XU X., WANG B., OEY M.S., FORD N.M., HECKMAN T., JI Z., GIAVALISCO M., AMORIN R., ATEK H., BLAIZOT J., BORTHAKUR S., CARR C., CASTELLANO M., DE BARROS S., DICKINSON M., FINKELSTEIN S.L., FLEMING B., FONTANOT F., GAREL T., GRAZIAN A., HAYES M., HENRY A., MAUERHOFER V., MICHEVA G., OSTLIN G., PAPOVICH C., PENTERICCI L., RAVINDRANATH S., ROSDAHL J., RUTKOWSKI M., SANTINI P., SCARLATA C., TEPLITZ H., THUAN T., TREBITSCH M., VANZELLA E. and VERHAMME A.
Abstract (from CDS):
The Lyman continuum (LyC) cannot be observed at the epoch of reionization (z >= 6) owing to intergalactic H I absorption. To identify LyC emitters (LCEs) and infer the fraction of escaping LyC, astronomers have developed various indirect diagnostics of LyC escape. Using measurements of the LyC from the Low-redshift Lyman Continuum Survey (LzLCS), we present the first statistical test of these diagnostics. While optical depth indicators based on Lyα, such as peak velocity separation and equivalent width, perform well, we also find that other diagnostics, such as the [O III]/[O II] flux ratio and star formation rate surface density, predict whether a galaxy is an LCE. The relationship between these galaxy properties and the fraction of escaping LyC flux suggests that LyC escape depends strongly on H I column density, ionization parameter, and stellar feedback. We find that LCEs occupy a range of stellar masses, metallicities, star formation histories, and ionization parameters, which may indicate episodic and/or different physical causes of LyC escape.
(Ref) Object type as listed in the reference "Ref"
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() Anterior to 2007, before we can link the objet type to a reference, or given by the CDS team in some particular cases
Other object types:
HII
(),
G
(Mrk)
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
ra dec : right ascension and declination (unit and frame defined according to your Output Options)
Grey values are increasing the original precision due to the computation of frame transformations
(wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
[error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
position angle (in degrees North celestial pole to East)
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
ra dec : right ascension and declination (unit and frame defined according to your Output Options)
Grey values are increasing the original precision due to the computation of frame transformations
(wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
[error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
position angle (in degrees North celestial pole to East)
quality : flag of quality
E ≥ 10"
D : 1-10" (and some old data)
C : 0.1-1"
B : 0.01-0.1" + 2MASS, Tyc
A : VLBI, Hipparcos
bibcode : bibcode of the coordinates reference
FK4
coord.
(ep=B1950 eq=1950) :
07 23 25.1 +69 17 29
[
]
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
ra dec : right ascension and declination (unit and frame defined according to your Output Options)
Grey values are increasing the original precision due to the computation of frame transformations
(wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
[error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
position angle (in degrees North celestial pole to East)
quality : flag of quality
E ≥ 10"
D : 1-10" (and some old data)
C : 0.1-1"
B : 0.01-0.1" + 2MASS, Tyc
A : VLBI, Hipparcos
bibcode : bibcode of the coordinates reference
Gal
coord.
(ep=J2000) :
146.4481 +28.5181
[
]
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References (564 between 1850 and 2024) (Total 564)
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