2016A&A...588A.142A

Query : 2016A&A...588A.142A

2016A&A...588A.142A - Astronomy and Astrophysics, volume 588A142-142 (2016/4-1)

Asymmetry in the triplet 3p-4s Mg lines in cool DZ white dwarfs.

ALLARD N.F., LEININGER T., GADEA F.X., BROUSSEAU-COUTURE V. and DUFOUR P.

Abstract (from CDS):

The purpose of the present work is to make an exhaustive study of the line shape of the triplet 3p-4s Mg line (Mgb triplet), which is perturbed by He in the extreme physical conditions found in the cool atmosphere of DZ white dwarfs. This study is undertaken by inferring both a unified theory of spectral line broadening and ab initio potential energies. Cool white dwarfs require a specific treatment for line broadening owing to the high helium densities that are involved. Beyond the conventional symmetrical Lorentzian core at low density, we show that the line profiles are asymmetrical and have significant additional contributions on the short wavelength side. This blue asymmetry is a consequence of low maxima in the corresponding Mg-He potential energy difference curves at short and intermediate internuclear distances. The new profiles are shown to provide a good fit to an SDSS (Sloan Digital Sky Survey) observation.

Abstract Copyright: © ESO, 2016

Journal keyword(s): line: profiles - stars: atmospheres - white dwarfs

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 G 137-24 WD* 15 35 05.8098944592 +12 47 45.199307508   15.31   15.7   DZ 55 0

Query : 2016A&A...588A.142A

Basic data :
G 137-24 -- White Dwarf
Other object types: otypes_help 		WD* (2011A&A,WD), PM* (2018yCat,G,...), * (CNS5,GEN#,...), Opt (LAMOST,PSO,...), WD? (2021MNRAS), NIR (2MASS)
ICRS coord. (ep=J2000) : 		15 35 05.8098944592 +12 47 45.199307508 (Optical) [ 0.0286 0.0249 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		15 32 44.8811811496 +12 57 50.533190421 [ 0.0286 0.0249 90 ]
Gal coord. (ep=J2000) : 		020.6613197968468 +49.1862944607177 [ 0.0286 0.0249 90 ]
Proper motions mas/yr : 		-165.597 -179.697 [0.034 0.033 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) -18 [45] / z(~) -0.00006 [0.00015] / cz -18.0 [45.0]
   E 2009ApJS..182..543A
Parallaxes (mas): 		51.9461 [0.0344] A 2020yCat.1350....0G
Spectral type: 		DZ D 2006ApJ...643..402K
Fluxes (11) :
B 15.31 [~] E ~
R 15.7 [~] E 2003AJ....125..984M
G 15.590476 [0.002868] C 2020yCat.1350....0G
J 14.939 [0.037] C 2003yCat.2246....0C
H 14.728 [0.045] C 2003yCat.2246....0C
K 14.706 [0.080] C 2003yCat.2246....0C
u (AB) 18.026 [0.013] C 2015ApJS..219...12A
g (AB) 15.9270 [0.0057] B 2017yCat.2349....0C
r (AB) 15.5091 [0.0005] B 2017yCat.2349....0C
i (AB) 15.4663 [0.0042] B 2017yCat.2349....0C
z (AB) 15.5434 [0.0070] B 2017yCat.2349....0C
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Identifiers (18) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

WD 1532+12 LSPM J1535+1247 SDSS J153505.75+124744.2 WD 1532+129
CNS5 3842 2MASS J15350582+1247452 SDSS J153505.75+124744.1 Gaia DR3 1193520666521113344
GEN# +9.80137024 NLTT 40607 TIC 157110489 Gaia DR2 1193520666521113344
G 137-24 PM J15350+1247 UCAC2 36307924
LAMOST J153505.75+124744.2 PSO J233.7735+12.7951 USNO-B1.0 1027-00313398

References (55 between 1850 and 2026) (Total 55)
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 : 1    Distance : 4    Fe/H : 7    Plx : 2    PM : 4    SpT : 12   

   

External archives :

Data at NED - NASA/IPAC Extragalactic Database : G 137-24

Link by name to the catalogue in VizieR :

WD 1532+12 G 137-24 LSPM J1535+1247 2MASS J15350582+1247452 NLTT 40607
SDSS J153505.75+124744.2 SDSS J153505.75+124744.1 UCAC2 36307924 USNO-B1.0 1027-00313398 WD 1532+129
Gaia DR3 1193520666521113344 Gaia DR2 1193520666521113344

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