1999ApJ...517..609L

Query : 1999ApJ...517..609L

1999ApJ...517..609L - Astrophys. J., 517, 609-621 (1999/June-1)

Measurability of kinetic temperature from metal absorption-line spectra formed in chaotic media.

LEVSHAKOV S.A., TAKAHARA F. and AGAFONOVA I.I.

Abstract (from CDS):

We present a new method for recovering the kinetic temperature of the intervening diffuse gas to an accuracy of 10%. The method is based on the comparison of unsaturated absorption-line profiles of two species with different atomic weights. The species are assumed to have the same temperature and bulk motion within the absorbing region. The computational technique involves the Fourier transform of the absorption profiles and the consequent entropy-regularized χ2-minimization (ERM) to estimate the model parameters. The procedure is tested using synthetic spectra of C+, Si+, and Fe+ ions. The comparison with the standard Voigt fitting analysis is performed, and it is shown that the Voigt deconvolution of the complex absorption-line profiles may result in estimated temperatures that are not physical. We also successfully analyze Keck telescope spectra of C II λ1334 and Si II λ1260 lines observed at the redshift z=3.572 toward the quasar Q1937-1009 by Tytler et al.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Quasars: Absorption Lines - Galaxies: Quasars: Individual: Alphanumeric: 1937-1009 - Radiative Transfer - Ultraviolet: Galaxies

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 B1937-1009 BLL 19 39 57.2566747152 -10 02 41.522299692   18.800 19.0 17.188   ~ 207 1

Query : 1999ApJ...517..609L

Basic data :
QSO B1937-1009 -- BL Lac
Other object types: otypes_help 		Rad (2020A&A,CRATES,...), QSO (2010A&A,QSO,...), Bla (2009A&A,[MGL2009],...), AGN (2020MNRAS,CGRaBS), X (2009A&A,RX), MIR (WISEA,WISE), BLL (2019ApJS), G (LEDA), * (Gaia), gam (INTREF), NIR (2MASS)
ICRS coord. (ep=J2000) : 		19 39 57.2566747152 -10 02 41.522299692 (Optical) [ 0.0701 0.0570 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		19 37 12.6545090427 -10 09 39.496174107 [ 0.0701 0.0570 90 ]
Gal coord. (ep=J2000) : 		029.3127577856108 -15.2876889964662 [ 0.0701 0.0570 90 ]
Proper motions mas/yr : 		-0.104 0.074 [0.085 0.073 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) 274721 [~] / z(emission) 3.787 [~] / cz 1135314 [~]
   (Opt) C 2017AJ....154..114O
Parallaxes (mas): 		0.1049 [0.1065] A 2018yCat.1345....0G
Fluxes (7) :
B 18.800 [~] D 2010ApJ...712..303C
V 19.0 [~] E ~
R 17.188 [~] D 2010ApJ...712..303C
G 17.023483 [0.003306] C 2020yCat.1350....0G
J 15.277 [0.044] C 2003yCat.2246....0C
H 14.561 [0.052] C 2003yCat.2246....0C
K 13.816 [0.050] C 2003yCat.2246....0C
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Identifiers (47) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

QSO B1937-1009 NVSS J193957-100241 TGSSADR J193957.2-100241 [P82] 1937-101
CGRaBS J1939-1002 NVSS J193957-100240 TIC 242787175 [VV2000] J193957.3-100241
CRATES J193957-100246 PKS 1937-101 TXS 1937-101 [VV2003] J193957.3-100241
GLEAM J193957-100240 PKS J1939-1002 VLSSr J193958.1-100259 [VV2006] J193957.3-100241
ICRF J193957.2-100241 PMN J1939-1002 VLSS J1939.9-1002 [VV2010] J193957.3-100241
IERS B1937-101 QSO B1937-101 WISEA J193957.25-100241.5 [VV96] J193957.3-100241
INTREF 985 QSO J1939-1002 WISE J193957.25-100241.4 [VV98] J193957.3-100241
IVS B1937-101 RFC J1939-1002 WISH B1937.2-1009A [WPW2003] J1939-1002
KODIAQ J193957-100241 RORF 1937-101 WISH B1937.2-1009 Gaia DR3 4193373834644172800
LEDA 2830144 RX J1939.9-1002 [LWT91] 1937-1009 Gaia DR1 4193373830346448128
2MASS J19395725-1002415 SPASS J193957-100305 [MGL2009] BZQ J1939-1002 Gaia DR2 4193373834644172800
MRC 1937-101 SQUAD DR1 J193957-100241 [MML2015] 5BZQ J1939-1002

References (207 between 1850 and 2026) (Total 207)
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 : 4    Plx : 1    PM : 3   

   

Observing logs
Herschel : 3   

   

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : QSO B1937-1009

Link by name to the catalogue in VizieR :

IERS B1937-101 2MASS J19395725-1002415 NVSS J193957-100241 NVSS J193957-100240 PKS 1937-101
PKS J1939-1002 PMN J1939-1002 WISEA J193957.25-100241.5 WISE J193957.25-100241.4 WISH B1937.2-1009A
WISH B1937.2-1009 Gaia DR3 4193373834644172800 Gaia DR1 4193373830346448128 Gaia DR2 4193373834644172800

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