2017MNRAS.471.3686F

Query : 2017MNRAS.471.3686F

2017MNRAS.471.3686F - Mon. Not. R. Astron. Soc., 471, 3686-3698 (2017/November-1)

Witnessing galaxy assembly in an extended z ~= 3 structure.

FUMAGALLI M., MACKENZIE R., TRAYFORD J., THEUNS T., CANTALUPO S., CHRISTENSEN L., FYNBO J.P.U., MOLLER P., O'MEARA J., PROCHASKA J.X., RAFELSKI M. and SHANKS T.

Abstract (from CDS):

We present new observations acquired with the Multi Unit Spectroscopic Explorer instrument on the Very Large Telescope in a quasar field that hosts a high column density damped Lyα absorber (DLA) at z ≃ 3.25. We detect Lyα emission from a nebula at the redshift of the DLA with line luminosity (27 ± 1) x 1041 erg s^- 1^, which extends over 37 ± 1 kpc above a surface brightness limit of 6 x 10–19 erg s^- 1^ cm^- 2^ arcsec^- 2^ at a projected distance of 30.5 ± 0.5 kpc from the quasar sightline. Two clumps lie inside this nebula, both with Lyα rest-frame equivalent width > 50 Å and with relative line-of-sight velocities aligned with two main absorption components seen in the DLA spectrum. In addition, we identify a compact galaxy at a projected distance of 19.1 ± 0.5 kpc from the quasar sightline. The galaxy spectrum is noisy but consistent with that of a star-forming galaxy at the DLA redshift. We argue that the Lyα nebula is ionized by radiation from star formation inside the two clumps, or by radiation from the compact galaxy. In either case, these data imply the presence of a structure with size ≫50 kpc inside which galaxies are assembling, a picture consistent with galaxy formation in groups and filaments as predicted by cosmological simulations such as the EAGLE simulations.

Abstract Copyright: © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): galaxies: evolution - galaxies: formation - galaxies: haloes - galaxies: high-redshift - quasars: absorption lines - quasars: individual: J025518.58+004847.6 - quasars: individual: J025518.58+004847.6

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 QSO J0255+0048 QSO 02 55 18.5784341184 +00 48 47.540744316   21.15 20.00     ~ 84 0

Query : 2017MNRAS.471.3686F

Basic data :
QSO J0255+0048 -- Quasar
Other object types: otypes_help 		QSO (2008ApJ,QSO,...), G (2013MNRAS), * (Gaia), Opt (SDSS)
ICRS coord. (ep=J2000) : 		02 55 18.5784341184 +00 48 47.540744316 (Optical) [ 0.2826 0.2521 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		02 52 44.2609680259 +00 36 40.567753752 [ 0.2826 0.2521 90 ]
Gal coord. (ep=J2000) : 		174.8213666014977 -49.1633228499398 [ 0.2826 0.2521 90 ]
Proper motions mas/yr : 		-0.380 -0.066 [0.422 0.326 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) 276625 [~] / z(emission) 3.988 [~] / cz 1195572 [~]
   (Opt) C 2017AJ....154..114O
Parallaxes (mas): 		0.4778 [0.3477] A 2020yCat.1350....0G
Fluxes (11) :
B 21.15 [~] D 2010A&A...518A..10V
V 20.00 [~] D 2010A&A...518A..10V
G 19.312599 [0.005493] C 2020yCat.1350....0G
J (AB) 18.622 [0.026] C 2013ApJS..206....4K
H (AB) 18.333 [0.034] C 2013ApJS..206....4K
K (AB) 18.206 [0.035] C 2013ApJS..206....4K
u (AB) 23.7678 [0.4070] D 2020ApJS..250....8L
g (AB) 20.6447 [0.0343] C 2020ApJS..250....8L
r (AB) 19.0953 [0.0127] C 2020ApJS..250....8L
i (AB) 18.7968 [0.0174] C 2020ApJS..250....8L
z (AB) 18.7361 [0.0377] C 2020ApJS..250....8L
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Identifiers (13) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

QSO J0255+0048 SDSS J025518.58+004847.4 [VV2003] J025518.6+004847 Gaia DR2 2498346192199590272
KODIAQ J025518+004847 SDSS J025518.58+004847.6 [VV2006] J025518.6+004847
QSO B0252+0036 SDSS J025518.58+004847.5 [VV2010] J025518.6+004847
SDSS J025518.57+004847.4 [VV2000] J025518.6+004847 Gaia DR3 2498346192199590272

References (84 between 1850 and 2026) (Total 84)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements Description of Measurements

Velocities : 16    Plx : 1    PM : 2   

   

External archives :

Data at NED - NASA/IPAC Extragalactic Database : QSO J0255+0048

Link by name to the catalogue in VizieR :

SDSS J025518.57+004847.4 SDSS J025518.58+004847.4 SDSS J025518.58+004847.6 SDSS J025518.58+004847.5 Gaia DR3 2498346192199590272
Gaia DR2 2498346192199590272

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