2007MNRAS.378.1049R

Query : 2007MNRAS.378.1049R

2007MNRAS.378.1049R - Mon. Not. R. Astron. Soc., 378, 1049-1063 (2007/July-1)

Resolving the pulsations of subdwarf B stars: HS 0039+4302, HS 0444+0458 and an examination of the group properties of resolved pulsators.

REED M.D., TERNDRUP D.M., ZHOU A.-Y., UNTERBORN C.T., AN D. and EGGEN J.R.

Abstract (from CDS):

We continue our program of single-site observations of pulsating subdwarf B (sdB) stars and present the results of extensive time series photometry of HS 0039+4302 and 0444+0458. Both were observed at MDM Observatory during the fall of 2005. We extend the number of known frequencies for HS 0039+4302 from four to 14 and discover one additional frequency for HS 0444+0458, bringing the total to three. We perform standard tests to search for multiplet structure, measure amplitude variations and examine the frequency density to constrain the mode degree ℓ.

Including the two stars in this paper, 23 pulsating sdB stars have received follow-up observations designed to decipher their pulsation spectra. It is worth an examination of what has been detected. We compare and contrast the frequency content in terms of richness and range and the amplitudes with regard to variability and diversity. We use this information to examine observational correlations with the proposed κ pulsation mechanism as well as alternative theories.


Abstract Copyright: 2007 The Authors. Journal compilation © 2007 RAS

Journal keyword(s): stars: individual: HS 0039+4302 - stars: individual: HS 0444+0857 (read: HS 0444+0458) - stars: oscillations - subdwarfs - stars: variables: others

CDS comments: In Keywords : HS 0444+0857 is a misprint for HS 0444+0458, In Table 1 : PG 0014+182 is a misprint for PG 0014+067.

Simbad objects: 24

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Number of rows : 24
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 PG 0014+068 HS* 00 16 54.2537878176 +07 04 30.043437816   15.3       sdO 76 1
2 HS 0039+4302 HS* 00 42 42.3970259304 +43 19 00.846907716   15.1       sdB 31 0
3 PG 0048+091 HS* 00 51 26.9371074840 +09 21 32.879383380   14.454 14.261 14.505   sdOB+F5V 37 0
4 V* EO Cet HS* 01 23 43.2471248112 -05 05 45.831024564   12.21 12.65     sdOV+F4V 68 0
5 V* BI Ari HS* 01 57 27.8862042360 +18 27 39.992930280   15.27       sdBO 21 0
6 HS 0444+0458 HS* 04 47 18.6321638088 +05 03 34.811637912   15.44 15.53     sdB 20 0
7 EC 05217-3914 HS* 05 23 25.4710949784 -39 11 54.080470284 14.21 15.31 15.55 15.94   sdB 29 0
8 V* UY Sex HS* 10 50 02.8265487864 -00 00 36.879009588 12.063 13.184 13.474 13.606 13.769 sdO9VIIHe6 175 0
9 Feige 48 HS* 11 47 14.4978515760 +61 15 31.789400364   13.12 13.28     sdB 125 0
10 V* GW Vir WD* 12 01 45.9731868264 -03 45 40.628670300   14.87 15.04     DOQZ1 505 0
11 PG 1219+534 HS* 12 21 29.0914917288 +53 04 36.796062144   12.41       sdB 90 1
12 PG 1325+102 HS* 13 27 48.5600155368 +09 54 51.049107756   13.73 13.98 14.29   sdBO 60 1
13 V* NY Vir HS* 13 38 48.1466908176 -02 01 49.207286748   13.43 13.66 13.75   sdB1VIIHe1 237 1
14 V* V361 Hya HS* 14 05 33.018072 -27 01 34.01328   15.446 15.258 15.161   sdB+ 129 0
15 PG 1605+072 HS* 16 08 03.6872637792 +07 04 28.748468964   12.53 12.83 13.18   sdB0.2VIHe3 136 0
16 PG 1618+563 HS* 16 19 26.9188578888 +56 06 01.009178568       13.93   sdB0VIIHe8 31 2
17 V* LS Dra HS* 18 24 52.4115107856 +57 47 23.528193612           sdOB 24 0
18 KPD 1930+2752 HS* 19 32 14.8088063952 +27 58 35.445679608 12.80 13.75 13.82     sdB 167 0
19 BPS CS 22880-0018 HS* 20 36 41.3091042960 -19 15 00.325331964 14.26 15.34 15.60     sdB 20 0
20 KPD 2109+4401 HS* 21 11 47.6445824136 +44 13 50.620755936 12.14 13.11 13.30 13.64   sdB 72 0
21 HS 2149+0847 HS* 21 51 54.3268752696 +09 01 21.014967612   16.4   15.8   sdOB 16 0
22 PG 2151+089 HS* 21 54 18.6553285752 +09 11 43.161873288   16.3   15.2   sdOB 18 0
23 V* V391 Peg HS* 22 04 12.1045050096 +26 25 07.819080600   14.41 14.61 15.00   sdB 112 2
24 Balloon 90100001 HS* 23 15 21.4810390968 +29 05 01.433373360   11.90 12.30     sdB 98 0

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