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


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.26CET05:45:42

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

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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 - 2021
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9695 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 733 0
3 HD 80558 s*b 09 18 42.3559725873 -51 33 38.336390468 6.15 6.47 5.93 5.36 4.94 B6Ia 107 0
4 V* R CrB RC* 15 48 34.4147978750 +28 09 24.298218765 6.44 6.31 5.71 5.26 5.08 G0Iep 762 0
5 HD 141318 Pu* 15 51 06.8044833762 -55 03 19.931264880 5.13 5.756 5.767 7.08   B2III 82 0
6 * zet01 Sco s*b 16 53 59.7270104119 -42 21 43.313745214 4.80 5.31 4.79 4.32 3.86 B1Ia-0ek 351 0
7 HD 163899 Pu* 17 59 56.3484038559 -33 53 26.958683912 7.88 8.51 8.31 9.17 8.59 B2Ib/II 45 0
8 * alf Cyg sg* 20 41 25.91514 +45 16 49.2197 1.11 1.34 1.25 1.14 1.04 A2Ia 722 0

    Equat.    Gal    SGal    Ecl

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