2012ApJ...751..151S


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.14CEST14:09:22

2012ApJ...751..151S - Astrophys. J., 751, 151 (2012/June-1)

Yellow hypergiants show long secondary periods?

STOTHERS R.B.

Abstract (from CDS):

There is observational evidence that intermittent long secondary periods of ∼1000 days are present in the well-observed yellow hypergiants ρ Cas and HR 8752. The long secondary period is interpreted here as the turnover time of giant convection cells in the convective envelope, as has been already suggested in the case of red giants and supergiants of high luminosity. The observed secondary periods and surface radial velocities of ρ Cas and HR 8752 agree with the theoretical predictions, within the expected errors. These results support a theoretical interpretation that now covers the entire initial mass range from 1 to 50 M for luminous cool stars.

Abstract Copyright:

Journal keyword(s): convection - stars: interiors - stars: oscillations - stars: variables: general - supergiants

Simbad objects: 5

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Number of rows : 5

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 M 33 GiG 01 33 50.904 +30 39 35.79 6.17 6.27 5.72     ~ 5278 1
2 IRC +10420 pA* 19 26 48.0981288433 +11 21 16.756524951   13.98 11.66     F8Ia+e 458 0
3 * 5 Lac s*r 22 29 31.8225058 +47 42 24.792707 7.15 6.05 4.37 2.98 1.91 K9Ia+B2V 134 0
4 V* V509 Cas LP* 23 00 05.1007915562 +56 56 43.348681058 8.01 6.68 5.13 3.96 3.11 G4_0 316 0
5 * rho Cas LP* 23 54 23.0339951270 +57 29 57.766930774 7.00 5.85 4.59 3.63 2.89 G2_0 365 0

    Equat.    Gal    SGal    Ecl

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2021.04.14-14:09:22

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