2021MNRAS.507.4178R

Query : 2021MNRAS.507.4178R

2021MNRAS.507.4178R - Mon. Not. R. Astron. Soc., 507, 4178-4195 (2021/November-1)

Pulsating subdwarf B stars observed with K2 during Campaign 7 and an examination of seismic group properties.

REED M.D., SLAYTON A., BARAN A.S., TELTING J.H., OSTENSEN R.H., JEFFERY C.S., UZUNDAG M. and SANJAYAN S.

Abstract (from CDS):

We report the discovery of four new pulsating subdwarf B (sdBV) stars from Campaign 7 of the Kepler spacecraft's K2 mission. EPIC 215776487, EPIC 217280630, EPIC 218366972, and EPIC 218717602 are all gravity (g)-mode pulsators and we also detect two pressure (p)-mode pulsations in EPIC 218717602. We detect asymptotic ℓ= 1 sequences in all four stars, allowing us to identify nearly all of the g modes. We detect evenly spaced frequency multiplets in EPIC 218717602 from which we determine a rotation period near 7 d. Spectroscopic observations determine that EPIC 218366972 is in a 5.92 d binary with most likely a white dwarf companion of canonical mass while the others have no detected companions. As we detect no multiplets in EPIC 218366972, it is added to the growing list of subsynchronously rotating stars. With 40 Kepler-detected sdBV stars and a growing number of Transiting Exoplanet Survey Satellite (TESS) publications, we update an examination of the group properties to provide direction for models. We notice a correlation between effective temperature and period of maximum pulsation amplitude, at least for g-mode pulsations, and update the previously observed effective temperature-rotation period relation.

Abstract Copyright: © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): stars: oscillations - subdwarfs

Simbad objects: 51

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Number of rows : 51
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 HD 4539 HS* 00 47 29.2193758344 +09 58 55.690280832 9.17 10.12 10.24     sdB 101 0
2 PG 0048+091 HS* 00 51 26.9371074840 +09 21 32.879383380   14.454 14.261 14.505   sdOB+F5V 37 0
3 CD-33 417 HS* 01 08 26.7781088232 -32 43 11.632335672   12.024 12.235 12.542   sdBHe1 39 0
4 PG 0342+026 HS* 03 45 34.5760235952 +02 47 52.714095360   10.844 10.926 11.186   sdB3VIIHe4 51 0
5 KUV 04421+1416 HS* 04 44 56.8983457992 +14 21 50.176351836   15.28       sdB 46 0
6 CD-28 1974 ** 05 07 20.178432 -28 02 24.88308 11.06 11.793 11.697 11.744   sdB+F 16 0
7 HD 269696 HS* 05 31 40.3594532592 -69 53 02.153902236 9.74 10.92 11.15     sdB+dM 202 0
8 V* DW Lyn HS* 07 07 09.7960158264 +60 38 50.159268348   14.7   15.34   sdB 61 1
9 GALEX J082003.3+173914 HS* 08 20 03.3574335672 +17 39 14.247846900   15.370 15.199 15.195   sdOB+F2V 17 0
10 GALEX J083603.8+155214 HS* 08 36 03.9877233168 +15 52 16.380159708   15.26 15.41 15.62   sdB2.5He7 25 0
11 EGGR 266 HS* 08 36 12.0336213432 +19 17 56.097211272   15.68 15.78     sdO 23 0
12 GALEX J085649.3+170115 HS* 08 56 49.2697884816 +17 01 14.711098224     13.17     sdBHe2 29 0
13 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
14 PG 1142-037 HS* 11 44 57.2433920664 -03 56 53.277278316   15.729 15.897   16.680 sdBO 25 0
15 Feige 48 HS* 11 47 14.4978515760 +61 15 31.789400364   13.12 13.28     sdB 125 0
16 BD-07 3477 HS* 12 44 20.2386233232 -08 40 16.846099536   10.46 10.594 10.895   sdB2VIIHe3 303 1
17 PG 1315-123 HS* 13 17 39.2591742480 -12 32 52.445441472   15.39 15.4     sdB+G? 19 0
18 V* NY Vir HS* 13 38 48.1466908176 -02 01 49.207286748   13.43 13.66 13.75   sdB1VIIHe1 237 1
19 GALEX J135544.6-080355 HS? 13 55 44.7185603736 -08 03 54.457425504           sd 15 0
20 V* V361 Hya HS* 14 05 33.018072 -27 01 34.01328   15.446 15.258 15.161   sdB+ 129 0
21 GALEX J164956.2-241734 HS* 16 49 56.2316994192 -24 17 34.401926580   16.9 16.23 16.239 15.93 sdB 6 0
22 PG 1716+426 HS* 17 18 03.8584522800 +42 34 12.562847292   13.69 13.97     sdB2VIIHe3 122 0
23 2MASS J18560707+4319192 HS* 18 56 07.0408028424 +43 19 19.273788552           sdB 23 0
24 GALEX J190221.9+485052 HS* 19 02 21.9425643552 +48 50 52.195229160   17.1   17.1   sdB+dM 36 0
25 2MASS J19033701+3836126 HS* 19 03 37.0267191120 +38 36 12.604186980           sdB 37 0
26 FBS 1903+432 HS* 19 05 06.3763958616 +43 18 31.220048592   14.978 15.218 15.505   sdB 35 1
27 2MASS J19090714+3756143 HS* 19 09 07.1451475032 +37 56 14.224028784           sdB 49 0
28 Kepler-429 HS* 19 09 33.4136944848 +46 59 04.108493616           sdB 38 0
29 GALEX J191534.6-205107 HS? 19 15 34.6336863312 -20 51 07.428022560           ~ 5 0
30 Cl* NGC 6791 KU B3 HS* 19 20 45.1716372576 +37 49 31.272065724 16.65 16.4 17.809 18.3   sdB 29 0
31 Cl* NGC 6791 KR V31 El* 19 21 02.4630101016 +37 47 09.060968436 16.80 17.73 17.125 16.565 16.10 ~ 25 1
32 KIC 2437937 HS* 19 21 03.3493572696 +37 46 59.623553532           sdB 15 1
33 Cl* NGC 6791 KU B4 HS* 19 21 12.8916906768 +37 45 51.138205956 16.73 17.69 17.873 17.910 18.02 sdB 46 0
34 2MASS J19230068+3715044 HS* 19 23 00.6774342816 +37 15 04.493380896           sdB/sdO 23 0
35 UCAC4 686-068711 HS* 19 24 58.1497315488 +47 07 53.672050236   15.649 15.640 15.947   sdB 44 0
36 UCAC4 698-068637 HS* 19 26 34.1086958928 +49 30 29.555956908   14.548 14.859 15.096   sdB 44 1
37 SDSS J192709.14+381026.3 HS* 19 27 09.1454735328 +38 10 26.393243016   17.2   17.3   sdB 23 0
38 SDSS J192715.88+380808.2 HS* 19 27 15.8823018024 +38 08 08.280985956   16.3   16.9   sdB+dM 30 0
39 2MASS J19310336+4413261 HS* 19 31 03.3754994016 +44 13 25.530992364           sdB 19 1
40 KPD 1930+2752 HS* 19 32 14.8088063952 +27 58 35.445679608 12.80 13.75 13.82     sdB 167 0
41 UCAC4 359-191357 * 19 33 46.9227490344 -18 17 13.649724888   15.55 15.65 15.73   ~ 4 0
42 2MASS J19343993+4758117 HS* 19 34 39.9403400856 +47 58 11.532614808           sdB 31 1
43 UCAC4 356-188020 * 19 34 53.7752341968 -18 55 52.537339344   15.79 15.81     ~ 3 0
44 Kepler-451 HS* 19 38 32.6123816016 +46 03 59.135231952   12.17 12.69 12.46 12.399 sdB+dM 103 0
45 GALEX J194138.4-233342 HS? 19 41 38.5121526504 -23 33 42.592663584   15.808 16.113 16.196   ~ 4 0
46 Kepler-70 HS* 19 45 25.4745687168 +41 05 33.882248544 13.80 14.71 14.87 15.43 15.72 sdB 81 1
47 UCAC4 689-072699 HS* 19 53 08.3854563936 +47 43 00.177113460   14.695 14.902 15.419   sdB 34 1
48 EC 21494-7018 HS* 21 53 41.2522034136 -70 04 31.442873916 10.50 11.35 11.57     sdB 28 0
49 GD 1110 HS* 23 19 24.4299110400 -08 52 37.936761780   12.778 12.947 13.265 13.179 sdB 43 0
50 V* EQ Psc HS* 23 34 34.6314973464 -01 19 36.929325288   12.823 12.780 13.556 13.243 sdB 34 0
51 CD-35 15910 HS* 23 44 22.0084841208 -34 27 00.387634032   10.71 11.00 11.255   sdBHe1 59 0

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