2017ApJ...835..242Z

Query : 2017ApJ...835..242Z

2017ApJ...835..242Z - Astrophys. J., 835, 242-242 (2017/February-1)

Evolution models of helium white dwarf-main-sequence star merger remnants.

ZHANG X., HALL P.D., JEFFERY C.S. and BI S.

Abstract (from CDS):

It is predicted that orbital decay by gravitational-wave radiation and tidal interaction will cause some close binary stars to merge within a Hubble time. The merger of a helium-core white dwarf with a main-sequence (MS) star can produce a red giant branch star that has a low-mass hydrogen envelope when helium is ignited and thus become a hot subdwarf. Because detailed calculations have not been made, we compute post-merger models with a stellar evolution code. We find the evolutionary paths available to merger remnants and find the pre-merger conditions that lead to the formation of hot subdwarfs. We find that some such mergers result in the formation of stars with intermediate helium-rich surfaces. These stars later develop helium-poor surfaces owing to diffusion. Combining our results with a model population and comparing to observed stars, we find that some observed intermediate helium-rich hot subdwarfs can be explained as the remnants of the mergers of helium-core white dwarfs with low-mass MS stars.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): binaries: close - stars: abundances - stars: chemically peculiar - stars: evolution - subdwarfs - white dwarfs - 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 148-36 ** 12 10 10.2456244297 +33 47 24.124913024   16.9   15.6   DAZ+M 44 0

Query : 2017ApJ...835..242Z

Basic data :
G 148-36 -- Double or Multiple Star
Other object types: otypes_help 		PM* (2016ApJ,G,...), WD* (2010A&A,WD), ** (2010A&A,[SGR2010]), * (USNO,Gaia), Opt (LAMOST,SDSS), LM* (2008AJ), EB* (2012MNRAS), UV (GALEX), NIR (2MASS), MIR (WISEA)
ICRS coord. (ep=J2000) : 		12 10 10.2456244297 +33 47 24.124913024 (Optical) [ 0.0273 0.0286 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		12 07 39.5869610250 +34 04 19.436864467 [ 0.0273 0.0286 90 ]
Gal coord. (ep=J2000) : 		173.5600920958736 +78.8992071796011 [ 0.0273 0.0286 90 ]
Proper motions mas/yr : 		-335.688 -280.678 [0.027 0.034 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) -105 [~] / z(~) -0.000350 [~] / cz -104.98 [~]
   (Opt) D 2011AJ....141...97W
Parallaxes (mas): 		21.7925 [0.0392] A 2020yCat.1350....0G
Spectral type: 		DAZ+M D 2013ApJS..204....5K
Fluxes (11) :
B 16.9 [~] E 2003AJ....125..984M
R 15.6 [~] E 2003AJ....125..984M
G 15.507359 [0.003132] C 2020yCat.1350....0G
J 12.458 [0.023] C 2003yCat.2246....0C
H 11.892 [0.028] C 2003yCat.2246....0C
K 11.560 [0.020] C 2003yCat.2246....0C
u (AB) 18.097 [0.013] C 2018MNRAS.477.4641R
g (AB) 16.938 [0.005] B 2009ApJS..182..543A
r (AB) 16.161 [0.004] B 2009ApJS..182..543A
i (AB) 14.919 [0.004] B 2009ApJS..182..543A
z (AB) 14.021 [0.005] B 2009ApJS..182..543A
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Identifiers (15) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

2MASS J12101023+3347239 LHS 6222 TIC 359032079 [SGR2010] J1210+3347
GALEX J121010.1+334723 LSPM J1210+3347 USNO-B1.0 1237-00212029 Gaia DR2 4028597414327329664
G 148-36 NLTT 29817 WD 1207+340 Gaia DR3 4028597414327329664
LAMOST J121010.13+334722.9 SDSS J121010.13+334722.9 WISEA J121009.95+334721.1

References (44 between 1850 and 2026) (Total 44)
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 : 3    Distance : 5    Fe/H : 2    Plx : 2    PM : 10    SpT : 9   

   

External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : G 148-36

Link by name to the catalogue in VizieR :

2MASS J12101023+3347239 GALEX J121010.1+334723 G 148-36 LHS 6222 LSPM J1210+3347
NLTT 29817 SDSS J121010.13+334722.9 USNO-B1.0 1237-00212029 WD 1207+340 WISEA J121009.95+334721.1
Gaia DR2 4028597414327329664 Gaia DR3 4028597414327329664

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