2009A&A...498..273G

Query : 2009A&A...498..273G

2009A&A...498..273G - Astronomy and Astrophysics, volume 498, 273-279 (2009/4-4)

Deneb's variability: a hint of a deep-lying convection zone?

GAUTSCHY A.

Abstract (from CDS):

During their post - main-sequence evolution, massive star models harbor a convection zone on top of their hydrogen burning shell. This physical property helps, under suitable circumstances, to destabilize low-degree nonradial modes that might explain the cyclic light variability of α Cygni variables. The results of first exploratory computations demonstrate that modes with periods ranging from about one dozen to several dozen days can be overstable in star models at about the position on the HR diagram where the prototype of the class, Deneb, is observed.

Abstract Copyright: ∼

Journal keyword(s): stars: supergiants - stars: oscillations - stars: evolution

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			~	10600	1
2	* bet Ori	s*b	05 14 32.27210	-08 12 05.8981	-0.56	0.10	0.13	0.13	0.15	B8Iae	753	0
3	HD 80558	s*b	09 18 42.3559197816	-51 33 38.338564212	6.15	6.47	5.93	5.36	4.94	B6Ia	113	0
4	V* R CrB	RC*	15 48 34.4154827352	+28 09 24.295852440	6.44	6.31	5.71	5.26	5.08	G0Iep	772	0
5	HD 141318	Pu*	15 51 06.8041626360	-55 03 19.928655972	5.13	5.756	5.767	7.08		B2III	86	0
6	* zet01 Sco	s*b	16 53 59.7271314888	-42 21 43.307334468	4.80	5.31	4.79	4.32	3.86	B1Ia-0ek	365	0
7	HD 163899	Pu*	17 59 56.3483552352	-33 53 26.956220568	7.88	8.51	8.31	9.17	8.59	B2Ib/II	49	0
8	* alf Cyg	sg*	20 41 25.91514	+45 16 49.2197	1.11	1.34	1.25	1.14	1.04	A2Ia	743	0

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