Документ взят из кэша поисковой машины. Адрес
оригинального документа
: http://www.astronet.ru/db/varstars/msg/1234265
Дата изменения: Fri Mar 19 13:51:17 2010 Дата индексирования: Fri Apr 9 04:49:35 2010 Кодировка: Поисковые слова: п п п п п п п п п п п п п п п п |
Received: 8.04.2009; accepted: 20.10.2009
(E-mail for contact: khruslov@bk.ru)
|
Comments:
1.
    TYC 0658 00556 1 = ASAS 035407+0759.2 =
NSVS 9387852 = NSVS 12150953
B-V = 0.355 (Tycho2), J-H = 0.144 (2MASS), P1/P0 = 0.7682
P = 0.13979 d (Pojmanski 2002)
Mode Frequency, c/d Semi-amplitude, V mag Period, day Epoch, HJD f0 7.15352 0.074 0.1397914 2453724.066 f1 9.31170 0.081 0.1073918 2453724.108
2.
    GSC 8959-00409 = ASAS 110953-6058.0
J-H = 0.156 (2MASS), P1/P0 = 0.7748
P = 0.110801 d (Pojmanski 2002)
Mode Frequency, c/d Semi-amplitude, V mag Period, day Epoch, HJD f0 9.02516 0.160 0.1108014 2453681.038 f1 11.64806 0.06 0.0858512 2453681.103 f1 + f0 20.67337 0.03 0.0483714 2453681.022
3.
    TYC 8664 00911 1 = ASAS 135715-5255.4 = HD 121517
B-V = 0.460 (Tycho2), J-H = 0.170 (2MASS), P1/P0 = 0.7712
P = 0.11103 d (Pojmanski 2002)
Mode Frequency, c/d Semi-amplitude, V mag Period, day Epoch, HJD f0 8.49018 0.065 0.1177831 2453490.086 f1 11.00931 0.112 0.0908322 2453490.091 f1 + f0 19.49949 0.026 0.0512834 2453490.036 f1 - f0 2.51913 0.020 0.396962 2453490.123 2f1 - f0 13.52843 0.007 0.0739184 2453490.024 2f0 16.98035 0.01 0.0588916 2453490.024 3f0 25.47057 0.01 0.0392610 2453490.005
4.
    TYC 7355 00453 1 = ASAS 162022-3541.2 = HD 146953
B-V = 0.657 (Tycho2), J-H = 0.227 (2MASS), P2/P1 = 0.7978
P = 0.1843 d (Pojmanski 2002)
Mode Frequency, c/d Semi-amplitude, V mag Period, day Epoch, HJD f1 5.42593 0.072 0.1843001 2453095.082 f2 6.80065 0.039 0.1470447 2453095.159 f2 + f1 12.22664 0.008 0.0817886 2453095.040 2f2 13.60113 0.016 0.0735224 2453095.050 Remarks:
I present an investigation of four known DSCT variables. The variability of these stars was reported by Pojmanski (2002).
I re-analysed ASAS-3 and NSVS data using the period-search software developed by Dr. V.P. Goranskij for Windows environment. According to ASAS-3 (Pojmanski 2002) and ROTSE-I/NSVS (Wozniak et al. 2004) data, the variables are high-amplitude double-mode Delta Scuti stars.
The period ratios P1/P0 and P2/P1 are typical for radially pulsating high-amplitude double-mode Delta Scuti stars (Petersen & Christensen-Dalsgaard 1996). In certain cases, multiple frequencies or frequencies connected with interactions between the two main modes were found (see the Comments).References:
Petersen, J.O., Christensen-Dalsgaard, J., 1996, Astron. and Astrophys., 312, 463
Pojmanski, G., 2002, Acta Astronomica, 52, 397
Wozniak, P.R., Vestrand, W.T., Akerlof, C.W., et al., 2004, Astron. J., 127, 2436