2001A&A...374..235Z


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.28CET06:22:32

2001A&A...374..235Z - Astronomy and Astrophysics, volume 374, 235-242 (2001/7-4)

Period and amplitude variations in the high-amplitude δ Scuti star AE Ursae Majoris.

ZHOU A.-Y.

Abstract (from CDS):

We present a comprehensive investigation of the variations of period and amplitude in the high-amplitude δ Scuti star AE UMa based on our new Johnson V time-series measurements and the existing data. No additional frequencies were detected even though all the available data sets from 1974 to 2001 were analysed. The light variations of AE UMa can be well-reproduced with the fundamental and first-overtone radial modes and their coupled terms. New observations and analyses support the most recent results of Pocs & Szeidl (2001). The fundamental period was essentially constant over the past 27 years with its standard value of 0.d086017066 (f0=11.625600c/d), while the first overtone period decreased at a rate of (1)/(P1)(dP1)/(dt)=-4.3x10–8yr–1. The amplitude variations in the two modes of AE UMa are detected at the milli-magnitude level on a time-scale of years. It seems that the amplitudes vary in opposite phases, implying an energy conservation or some kind of intrinsic variability cause. We deny the over-interpretation of the period change given by Hintz et al. (1997) and explore its reason.

Abstract Copyright:

Journal keyword(s): stars: variable: δ Scuti stars - stars: oscillations - stars: individual: AE UMa

CDS comments: in ref list Broglia, Conconi 1975A&AS...22..243B instead of A&A.22

Simbad objects: 13

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Number of rows : 13

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 * tet02 Tau dS* 04 28 39.7445471109 +15 52 15.122606898 3.690 3.600 3.410 5.43   A7III 418 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 V* AE UMa SX* 09 36 53.1553463250 +44 04 00.401084801   11.54 11.35     A9 77 0
6 TYC 2998-1166-1 PM* 09 37 12.0246471966 +43 58 19.972141842   13.10 12.21 11.68   ~ 3 0
7 TYC 2998-963-1 * 09 37 17.2480548765 +43 56 38.952914304   12.55 11.54     ~ 1 0
8 TYC 2998-1249-1 * 09 37 28.5823140504 +44 01 16.793648215   11.82 11.32     ~ 3 0
9 V* FG Vir dS* 12 14 15.4567370777 -05 42 59.750421714   6.807 6.558     A8/9V 208 0
10 * 4 CVn dS* 12 23 47.0114947753 +42 32 33.866981068   6.382 6.022     F3III-IV 189 0
11 V* XX Cyg SX* 20 03 15.6422423360 +58 57 16.525128223   11.99 11.86     A5-F5 111 0
12 V* DQ Cep dS* 20 57 48.6084541481 +55 29 15.601561739   7.59 7.26     F1IV 78 0
13 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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2020.10.28-06:22:32

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