2003A&A...409.1031P

Query : 2003A&A...409.1031P

2003A&A...409.1031P - Astronomy and Astrophysics, volume 4091031-1035 (2003/10-3)

Asteroseismology of HADS stars: V974 Oph, a radial pulsator flavoured by nonradial components.

PORETTI E.

Abstract (from CDS):

The analysis of a dense time-series on V974 Oph disclosed the rich pulsational content (at least five independent terms) of this high-amplitude (0.60mag in B-light) δ Sct star. A mode with a frequency very close to the main one (probably the fundamental radial mode) has been detected: such a doublet is not a common feature in stars of the same class. Also another term can be considered a radial one, but the high ratio (0.786) raises some problems that can be solved only by admitting very low metallicity. It is quite evident that some undetectable terms are again hidden in the noise, as the least-squares fit leaves a rms residual much higher than the observational noise. All that considered, nonradial modes seem to play a key role in the light variability of V974 Oph. Revealing an unsuspected asteroseismic interest, V974 Oph provides a link between low- and high-amplitude δ Sct stars.

Abstract Copyright: ∼

Journal keyword(s): methods: data analysis - stars: oscillations - techniques: photometric - stars: variables: δ Sct - stars: individual: V974 Oph

CDS comments: In fig. 5, MACHO 114.20368.551 is a misprint for MACHO 121.22427.551. MACHO 104.20638.40 is a misprint for MACHO 109.20638.40.

Simbad objects: 26

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Number of rows : 26
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 * p Tau dS* 04 10 49.8608447112 +26 28 51.436474392   5.715 5.387     F2IV-V 211 0
2 V* V1162 Ori dS* 05 32 01.9910944584 -07 15 24.656437548   10.3 9.9     A7V 52 0
3 V* AD CMi dS* 07 52 47.1853100064 +01 35 50.473377528   9.66 9.38     F0IV/V 147 0
4 V* AI Vel dS* 08 14 05.1459825192 -44 34 32.854644660   6.98 6.70     A9IV/V 192 0
5 V* BN Cnc dS* 08 40 39.2340192816 +19 13 41.848124700   8.01 7.80     A9V 120 0
6 V* AN Lyn dS* 09 14 28.6859754192 +42 46 38.358171444   10.94 10.64     kA6hF1mA9 67 0
7 Cl* NGC 3201 MKT V3 SX* 10 17 36.7423 -46 23 03.546   17.97 17.46   16.81 ~ 4 0
8 NGC 3201 GlC 10 17 36.82 -46 24 44.9           ~ 1001 0
9 Cl* NGC 3201 MKT V4 V* 10 17 42.6 -46 24 20   17.80 17.37     ~ 2 0
10 Cl* NGC 3201 MKT V6 SX* 10 17 42.61 -46 24 49.3   17.44 16.96   16.65 ~ 4 0
11 Cl* NGC 3201 MKT V1 V* 10 17 43.5 -46 21 53   17.62 17.15     ~ 2 0
12 Cl* NGC 3201 MKT V10 SX* 10 17 51.02 -46 25 57.9   17.60 16.88   16.34 ~ 3 0
13 V* FG Vir dS* 12 14 15.4565381808 -05 42 59.750820036   6.807 6.558     A8/9V 223 0
14 V* V974 Oph dS* 17 37 33.7423575432 -29 45 25.226399952   11.81 11.50     A5 40 0
15 HD 159822 * 17 37 56.8097700912 -29 28 33.652645536   10.21 10.04     B9III/IV 8 0
16 HD 160108 * 17 39 20.4450400464 -29 31 51.496854852   7.678 6.724     K1III 16 0
17 V* V567 Oph dS* 17 58 27.2142123024 +01 06 05.222602440   11.65 11.08     G5 56 0
18 OGLE BLG511.11 72281 dS* 18 03 54.04 -27 29 49.5     18.230   16.843 ~ 4 0
19 OGLE BLG512.11 61983 dS* 18 03 57.19 -28 52 12.8     17.012   16.011 ~ 5 0
20 OGLE BLG512.27 122958 dS* 18 04 18.54 -28 14 33.3     14.064   13.308 ~ 4 0
21 OGLE BLG512.19 78125 dS* 18 04 33.1281013560 -28 28 09.850008108     13.549   12.714 ~ 4 0
22 OGLE BLG521.21 56047 dS* 18 08 48.01 -30 19 39.4     17.408   16.403 ~ 4 0
23 V* V798 Cyg dS* 19 38 06.8984643360 +30 54 33.506397972           ~ 34 0
24 V* V1719 Cyg cC* 21 04 32.9209811688 +50 47 03.276283920   8.41 7.99     F5III 89 0
25 V* DY Peg SX* 23 08 51.1858042512 +17 12 55.997525808   10.56 10.26     F5 204 1
26 V* SX Phe SX* 23 46 32.8928138474 -41 34 54.769886474   7.54 7.31     A3V 348 0

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