2005ApJ...622L..81H

Query : 2005ApJ...622L..81H

2005ApJ...622L..81H - Astrophys. J., 622, L81-L84 (2005/April-1)

Cold neutral gas in a z = 4.2 damped Lyα system: fuel for star formation.

HOWK J.C., WOLFE A.M. and PROCHASKA J.X.

Abstract (from CDS):

We discuss interstellar temperature determinations using the excitation equilibrium of the ²P levels of Si II and C II. We show how observations of the ²P_3/2fine-structure levels of Si II and C II (which have significantly different excitation energies, corresponding to ∼413 and 92 K, respectively) can be used to limit gas kinetic temperatures. We apply this method to the z=4.224 damped Lyα system toward the quasar PSS 1443+27. The lack of significant absorption out of the Si II ²P_3/2level and the presence of very strong C II ²P_3/2provide an upper limit to the temperature of the C II*-bearing gas in this system. Assuming a solar Si/C ratio, the observations imply a 2 σ limit T<954 K for this absorber; a supersolar Si/C ratio gives stricter limits, T<524 K. The observations suggest the presence of a cold neutral medium; such cold gas may serve as the fuel for star formation in this young galaxy.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Evolution - ISM: Atoms - ISM: Evolution - Galaxies: Quasars: Absorption Lines

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 J1443+2724	QSO	14 43 31.1697928632	+27 24 36.768781008			19.3			~	94	0

Query : 2005ApJ...622L..81H

Basic data :

QSO J1443+2724 -- Quasar

QSO (2010A&A,QSO,...), * (Gaia), Opt (SDSS)

14 43 31.1697928632 +27 24 36.768781008 (Optical) [ 0.2332 0.2907 90 ] A 2020yCat.1350....0G

14 41 20.0518215937 +27 37 17.526003426 [ 0.2332 0.2907 90 ]

040.0894200932043 +65.1452118224645 [ 0.2332 0.2907 90 ]

0.008 -0.058 [0.318 0.370 90] A 2020yCat.1350....0G

V(km/s) 280215 [~] / z(emission) 4.443 [~] / cz 1331978 [~] (Opt) C 2017AJ....154..114O

0.0992 [0.4031] A 2020yCat.1350....0G

V 19.3 [~] E ~

G 19.568626 [0.004067] C 2020yCat.1350....0G

u 25.584 [0.830] C 2010AJ....139.2360S

g (AB) 22.0849 [0.0759] C 2020ApJS..250....8L

r (AB) 19.6365 [0.0226] C 2020ApJS..250....8L

i (AB) 19.0090 [0.0157] C 2020ApJS..250....8L

z (AB) 18.8050 [0.0422] C 2020ApJS..250....8L

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`QSO J1443+2724`	`SDSS J144331.17+272436.7`	`[VV2003] J144331.2+272437`	`[VV98] J144331.2+272437`
`KODIAQ J144331+272436`	`SDSS J144331.16+272436.7`	`[VV2006] J144331.2+272437`	`Gaia DR3 1280009861773769344`
`PSS J1443+2724`	`SQUAD DR1 J144331+272436`	`[VV2010] J144331.1+272436`	`Gaia DR2 1280009861773769344`
`QSO B1441+2737`	`[VV2000] J144331.2+272437`	`[VV96] J144331.2+272437`

References (94 between 1850 and 2026) (Total 94)
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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SDSS J144331.17+272436.7 SDSS J144331.16+272436.7 Gaia DR3 1280009861773769344 Gaia DR2 1280009861773769344

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