2001A&A...373..589L


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.14CET01:01:28

2001A&A...373..589L - Astronomy and Astrophysics, volume 373, 589-596 (2001/7-2)

SV Vulpeculae: A first crossing Cepheid?

LUCK R.E., KOVTYUKH V.V. and ANDRIEVSKY S.M.

Abstract (from CDS):

We have undertaken a search for Cepheid variables which are crossing the instability strip for the first time. Such stars have finished their main sequence evolution and are moving through the HR diagram toward the red giant region. This evolutionary time interval is quite short when compared with the following stages of the core helium burning. Therefore, the number of the Cepheids which are crossing the instability strip for the first time should be at most several percent of the total number of Cepheids. The signature of a first crossing Cepheid is that its surface abundances should reflect its original composition. Using high quality spectral material obtained for a significant number of the Cepheids and determining consistent abundances throughout the sample, we have discovered one star, SV Vul, which can be considered a first crossing Cepheid.

Abstract Copyright:

Journal keyword(s): stars: variable: Cepheids - stars: abundances

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 - 2020
#notes
1 V* T Mon cC* 06 25 12.9997562821 +07 05 08.561189768 8.24 7.20 5.98   4.996 G3Iabv+A0p 438 1
2 V* U Sgr cC* 18 31 53.3321808602 -19 07 30.262730218 8.50 7.81 6.68   5.413 G1Ib 424 0
3 V* S Vul RV* 19 48 23.8064092485 +27 17 11.426469538   10.99 8.69     K0 170 0
4 V* SV Vul cC* 19 51 30.9059608126 +27 27 36.835645654 8.65 7.86 6.74   5.703 F8Ia 391 0
5 * del Cep cC* 22 29 10.2650184 +58 24 54.713856 4.71 4.35 3.75   3.219 F5Iab:+B7-8 670 0

    Equat.    Gal    SGal    Ecl

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2019.11.14-01:01:28

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