2005A&A...431..615A


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.26CET20:33:36

2005A&A...431..615A - Astronomy and Astrophysics, volume 431, 615-622 (2005/2-4)

HD 121190: A cool multiperiodic slowly pulsating B star with moderate rotation.

AERTS C. and KOLENBERG K.

Abstract (from CDS):

We have gathered and analysed multicolour Geneva photometry and high-resolution spectroscopy of the stars HD 121190 (B9V) and HD 106419 (B9III) whose short-term periodic variability had become evident from their HIPPARCOS data. We find three significant frequencies for HD 121190 in the Geneva data: 2.6831, 2.6199 and 2.4713c/d and classify the star as a slowly pulsating B star, the coolest single star of that class known to date. Its amplitude ratios are compatible with low-degree gravity modes. The spectra reveal low-amplitude variability and vsin i=118km/s which implies that the star rotates at 26% of its critical velocity. For HD 106419 we are unable to confirm the period found from the HIPPARCOS photometry in our ground-based data; rather we find a marginally significant frequency of 0.8986c/d. This star is probably an evolved slowly pulsating B star with complex variations. HD 106409 is also a moderate rotator as the spectra reveal vsin i=78km/s, which is also 26% of its critical velocity.

Abstract Copyright:

Journal keyword(s): stars: oscillations - stars: variables: general - stars: individual: HD 121190 - stars: individual: HD 106419 - stars: early-type - line: profiles

Simbad objects: 2

goto Full paper

goto View the reference in ADS

Number of rows : 2

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 HD 106419 * 12 14 49.3158418289 -71 32 03.415098258   8.44 8.30     B9III 15 0
2 HD 121190 Pu* 13 55 12.1418794262 -52 09 38.953997739 5.33 5.63 5.71     B9V 69 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2005A&A...431..615A and select 'bookmark this link' or equivalent in the popup menu


2021.02.26-20:33:36

© Université de Strasbourg/CNRS

    • Contact