Query : 2004A&A...428..209R

2004A&A...428..209R - Astronomy and Astrophysics, volume 428, 209-214 (2004/12-2)

Synthetic photometry for non-radial pulsations in subdwarf B stars.


Abstract (from CDS):

We describe a method for computing theoretical photometric amplitude ratios for a number of modes of nonradially pulsating subdwarf B stars in both SDSS and UBVR systems. In order to avoid costly solutions of the non-adiabatic non-radial pulsation equations, we have adopted the adiabatic approximation. We argue that this is a valid approach, at least for the V361 Hya stars, because observations show that the temperature perturbations dominate the radius perturbations in the flux variation. We find that for V361 Hya stars, low-degree (l=0,1,2) modes may be difficult to distinguish using optical photometry. However, the high degree modes (l=3,4) are relatively well separated and may be distinguished more easily. We have also computed the amplitude ratios for a number of modes in PG 1716+426 stars. For these stars, the amplitude ratios for low degree modes (l=0,1) are well resolved. For oscillations with periods ∼40-min, higher-degree modes

Abstract Copyright:

Journal keyword(s): stars: subdwarfs - stars: atmospheres - stars: variables: general

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
1 V* V361 Hya ** 14 05 33.00 -27 01 34.1   15.45 15.26 15.16   sdB+ 114 0
2 PG 1716+426 HS* 17 18 03.8584522800 +42 34 12.562847292   13.69 13.97     sdB2VIIHe3 105 0
3 * bet Cep bC* 21 28 39.5968513 +70 33 38.574681 2.05 3.01 3.23 3.33 3.55 B0.5IIIs 713 0

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