2001A&A...368..880P


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.27CET00:00:27

2001A&A...368..880P - Astronomy and Astrophysics, volume 368, 880-887 (2001/3-4)

Stability of pulsation of the double-mode high-amplitude δ Scuti star AE Ursae Majoris.

POCS M.D. and SZEIDL B.

Abstract (from CDS):

Stability of both the fundamental and first overtone oscillations of AE UMa was investigated by different methods which led to concordant results. The fundamental period of AE UMa has been essentially constant in the past 60 years consistent with the theoretical expectation (Breger & Pamyatnykh, 1998A&A...332..958B). The reported fast period decrease (Hintz et al., 1997PASP..109.1073H) is shown to be incorrect. The constancy of the fundamental period suggests that the star is in the post-main sequence evolutionary state as suggested by the evolutionary theories. The first overtone period is decreasing with a rate of (1/P1)x(dP1/dt)=-7.3x10–8yr–1. The fact that the rate of period change for two modes is quite different indicates that non-evolutionary effects may also generate period changes. The changes in amplitude of the fundamental and first overtone were examined by comparing the least-squares amplitude solution for different segments of observations. Small long-term variations in the amplitudes have occurred in the past 25 years.

Abstract Copyright:

Journal keyword(s): stars: oscillation - stars: variables: δ Sct - stars: individual: AE UMa

Simbad objects: 12

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Number of rows : 12

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* RV Ari dS* 02 15 07.5020716546 +18 04 27.916736220   11.78       A 68 0
2 V* V1162 Ori dS* 05 32 01.9917190902 -07 15 24.659936685   10.3 9.9     ~ 45 0
3 V* AI Vel dS* 08 14 05.1458681791 -44 34 32.852065552   6.98 6.70     A9IV/V 179 0
4 V* AN Lyn dS* 09 14 28.6858440760 +42 46 38.363046686   10.94 10.64     A7IV/V 51 0
5 HD 82883 * 09 36 06.3380397013 +43 53 26.140521402   10.42 10.18     A3 5 0
6 V* AE UMa SX* 09 36 53.1553463250 +44 04 00.401084801   11.54 11.35     A9 77 0
7 BD+44 1884 PM* 09 37 32.6722092795 +43 53 37.970324885       9.8   F8 5 0
8 NGC 7078 210 RR* 21 29 52.0268326957 +12 08 11.609604515   16.14 15.80     ~ 25 0
9 M 15 GlC 21 29 58.33 +12 10 01.2   3       ~ 2922 0
10 V* BP Peg RR* 21 33 13.5340579722 +22 44 24.304287696   12.20 12.05     A0 62 0
11 V* DY Peg SX* 23 08 51.1855512550 +17 12 55.998206149   10.56 10.26     F5 192 1
12 V* SX Phe SX* 23 46 32.8929064612 -41 34 54.770795675   7.40 7.12     A3V 315 0

    Equat.    Gal    SGal    Ecl

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2020.10.27-00:00:27

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