2015A&A...580L...9W

Query : 2015A&A...580L...9W

2015A&A...580L...9W - Astronomy and Astrophysics, volume 580, L9-9 (2015/8-1)

Wider pulsation instability regions for β Cephei and SPB stars calculated using new Los Alamos opacities.

WALCZAK P., FONTES C.J., COLGAN J., KILCREASE D.P. and GUZIK J.A.

Abstract (from CDS):

Our goal is to test the newly developed OPLIB opacity tables from Los Alamos National Laboratory and check their influence on the pulsation properties of B-type stars. We calculated models using MESA and Dziembowski codes for stellar evolution and linear, nonadiabatic pulsations, respectively. We derived the instability domains of β Cephei and SPB-types for different opacity tables OPLIB, OP, and OPAL. The new OPLIB opacities have the highest Rosseland mean opacity coefficient near the so-called Z-bump. Therefore, the OPLIB instability domains are wider than in the case of OP and OPAL data.

Abstract Copyright: ∼

Journal keyword(s): asteroseismology - atomic data - opacity - stars: oscillations

Simbad objects: 8

Full paper

View the references in ADS

Number of rows : 8

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2023	#notes
1	NAME SMC	G	00 52 38.0	-72 48 01		2.79	2.2			~	10690	1
2	* nu. Eri	bC*	04 36 19.1414419	-03 21 08.856678	2.82	3.737	3.928			B2III	386	0
3	NAME LMC	G	05 23 34.6	-69 45 22			0.4			~	16760	1
4	V* W Vir	WV*	13 26 01.9928807928	-03 22 43.431062880		10.33	9.46	9.29	9.393	F2Ibe	299	0
5	* del Sct	dS*	18 42 16.4268984096	-09 03 09.188922060		5.04	4.71			F2II-III	470	0
6	V* RR Lyr	RR*	19 25 27.9129605304	+42 47 03.693258204		7.36		7.6		kA3hF0	904	0
7	* del Cep	cC*	22 29 10.2626640314	+58 24 54.697613650	4.71	4.35	3.75		3.219	F5Iab:+B7-8	717	0
8	* 12 Lac	bC*	22 41 28.6495065456	+40 13 31.609736580	4.24	5.080	5.229			B2III	354	0

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