2010MNRAS.402..295R

Query : 2010MNRAS.402..295R

2010MNRAS.402..295R - Mon. Not. R. Astron. Soc., 402, 295-306 (2010/February-2)

Study of sdO models: pulsation analysis.

RODRIGUEZ-LOPEZ C., MOYA A., GARRIDO R., MacDONALD J., OREIRO R. and ULLA A.

Abstract (from CDS):

We have explored the possibility of driving pulsation modes in models of subluminous O-stars (sdOs), in which the effects of element diffusion, gravitational settling and radiative levitation have been neglected so that the distribution of iron-peak elements remains uniform throughout the evolution. The stability of these models was determined using a non-adiabatic oscillations code. We analysed 27 sdO models from 16 different evolutionary sequences and discovered the first ever sdO models capable of driving high-radial-order g modes. In one model, the driving is by a classical κ mechanism due to the opacity bump from iron-peak elements at temperature ∼200000 K. In a second model, the driving results from the combined action of κ mechanisms operating in three distinct regions of the star: (i) a carbon-oxygen partial ionization zone at temperature ∼2x10⁶ K; (ii) a deeper region at temperature ∼2x10⁷ K, which we attribute to ionization of argon, and (iii) at the transition from radiative to conductive opacity in the core of the star.

Journal keyword(s): stars: oscillations - stars: variables: other

Simbad objects: 1

Full paper

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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	V* V499 Ser	HS*	16 00 43.6054435536	+07 48 02.886625548						sdOHe	31	0

Query : 2010MNRAS.402..295R

Basic data :

V* V499 Ser -- Hot Subdwarf

SB* (), * (2015MNRAS,Gaia), HS* (2015MNRAS), V* (V*), blu (2022A&A), UV (GALEX), Opt (SDSS)

16 00 43.6054435536 +07 48 02.886625548 (Optical) [ 0.0717 0.0772 90 ] A 2020yCat.1350....0G

15 58 17.8141333106 +07 56 26.557069224 [ 0.0717 0.0772 90 ]

018.6480529672812 +41.2699729281432 [ 0.0717 0.0772 90 ]

1.369 -14.788 [0.087 0.081 90] A 2020yCat.1350....0G

V(km/s) -120 [27] / z(~) -0.00040 [0.00009] / cz -119.9 [27.0] C 2008ApJS..175..297A

0.2019 [0.1057] A 2020yCat.1350....0G

sdOHe D 2015MNRAS.446.4078K

G 17.458244 [0.003015] C 2020yCat.1350....0G

u (AB) 17.208 [0.008] C 2008ApJS..175..297A

g (AB) 17.409 [0.005] C 2008ApJS..175..297A

r (AB) 17.614 [0.006] C 2008ApJS..175..297A

i (AB) 17.664 [0.007] C 2008ApJS..175..297A

z (AB) 17.766 [0.016] C 2008ApJS..175..297A

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`SDSS J160043.60+074802.8`	`SDSS J160043.60+074802.9`	*`V V499 Ser`**	`Gaia DR2 4451189657584365312`
`GALEX J160043.6+074803`	`SDSS J160043.59+074802.8`	`Gaia DR3 4451189657584365312`

References (31 between 1850 and 2026) (Total 31)
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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External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : V* V499 Ser

Link by name to the catalogue in VizieR :

`SDSS J160043.60+074802.8`	`GALEX J160043.6+074803`	`SDSS J160043.60+074802.9`	`SDSS J160043.59+074802.8`	*`V V499 Ser`**
`Gaia DR3 4451189657584365312`	`Gaia DR2 4451189657584365312`

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