2006A&A...454..839K


C.D.S. - SIMBAD4 rel 1.7 - 2020.11.25CET07:08:25

2006A&A...454..839K - Astronomy and Astrophysics, volume 454, 839-844 (2006/8-2)

Precise radial velocities with BOES. Detection of low-amplitude pulsations in the K-giant α Arietis.

KIM K.M., MKRTICHIAN D.E., LEE B.-C., HAN I. and HATZES A.P.

Abstract (from CDS):

We present the first results from a high-precision radial velocity study of the K2III giant star {alpha} Ari. Observations were acquired over 6 nights in 2004 using the new high-resolution spectrograph BOES (Bohyunsan Observatory Echelle Spectrograph) of the 1.8-m telescope. A high radial-velocity precision was achieved by using the high-resolution (R=90000) mode of BOES and an iodine gas absorption cell. The radial velocity measurements made during but on shorter time-scales and with a lower amplitude. Two probable periods fit the radial velocity measurements from the second run reasonably well: 0.185days or an alias of 0.256days. The shorter period coincides with the secondary one found in the earlier measurements. We conclude that, similar to other K-giant pulsating stars, {alpha} Ari shows unstable acoustic pulsations or mode switching on time scales of tens of days. The calculated pulsation constants for the dominant 0.571-day period is consistent with third-overtone pulsations, while the secondary periodicity found in both data runs corresponds to a high overtone (n≥12).

Abstract Copyright:

Journal keyword(s): stars: late-type - stars: oscillations

Simbad objects: 44

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Number of rows : 44

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 PB 5835 WD* 00 16 51.4149669345 -01 13 29.300573363   16 16.80 17.41   PG1159 14 0
2 GSC 09137-03505 RG* 00 22 51.7541807119 -72 14 37.652303188   13.77 12.35 12.081   K2.5III 6 0
3 NGC 246 PN 00 47 03.3420803259 -11 52 18.975106178 10.15 11.52 11.76 12.18   PG1159 455 0
4 RX J0122.9-7521 WD* 01 22 53.4131820888 -75 21 14.724330380     15.4     PG1159 35 0
5 PG 0122+200 WD* 01 25 22.5118179721 +20 17 56.963251283   16.2   16.9   DOZ.7 102 0
6 GD 1088 ** 01 32 39.347 -19 21 40.38   15.51 15.77 15.77   PG1159 42 0
7 M 76 PN 01 42 19.6604707683 +51 34 31.553132974     17.48   17.69 DOZ 358 2
8 * tau Cet PM* 01 44 04.0834226 -15 56 14.926552 4.43 4.22 3.50 2.88 2.41 G8V 1105 1
9 * alf Ari PM* 02 07 10.40570 +23 27 44.7032 4.29 3.17 2.01 1.15 0.54 K2-IIIbCa-1 607 1
10 PN IsWe 1 PN 03 49 05.9055783968 +50 00 14.895090065 15.71 16.374 16.523 16.576 16.644 DOZ 57 1
11 KUV 03467-0108 WD* 03 49 17.4090395531 -00 59 19.230131734   18.0 17.81     PG1159 15 1
12 HS 0444+0453 WD* 04 47 04.5045675529 +04 58 41.339114578   15.9   16.1   DQZO.5 20 0
13 PN K 1-27 PN 05 57 02.1748480138 -75 40 22.475592752     16.04 16.27 16.41 sdOHe 80 0
14 HS 0704+6153 WD* 07 09 32.4974363571 +61 48 19.452647859   17.3   17.1   PG1159 31 0
15 WRAY 17-1 PN 07 14 49.4234866358 -46 57 39.211089426   13.8 13.00     PG1159 74 0
16 PN A66 21 PN 07 29 02.7094421237 +13 14 48.589321539   15.67 15.99     DOZ 181 0
17 KUV 07523+4017 WD* 07 55 40.9404091419 +40 09 17.908303755   17.00 17.53     PG1159 15 0
18 PN ARO 121 PN 07 57 51.6174582613 +53 25 16.943530807   16.775 17.128 17.288 17.501 DQ 152 1
19 SDSS J093546.53+110529.0 WD* 09 35 46.5389709181 +11 05 28.901994490           PG1159 10 0
20 PN Lo 4 PN 10 05 45.7878014012 -44 21 33.523563573           sdO 125 1
21 SBSS 1020+541 WD* 10 23 27.4217697326 +53 52 58.717971857   17.5 17.91     PG1159 15 0
22 PG 1144+005 WD* 11 46 35.2287794057 +00 12 33.539708785   14.59 14.9     PG1159 79 0
23 PG 1151-029 WD* 11 54 15.0623345997 -03 12 05.133077758   16.07       DOZ1 28 0
24 V* GW Vir WD* 12 01 45.9728868857 -03 45 40.627851273   14.87 15.04     DOQZ1 464 0
25 SDSS J121523.08+120300.7 WD* 12 15 23.0852127541 +12 03 00.798513429   17.37 18.19     PG1159 9 0
26 FBS 1342+673 WD* 13 43 41.8838174085 +67 01 54.512616365   16.37 17.15     PG1159 17 0
27 * alf Boo RG* 14 15 39.67207 +19 10 56.6730 2.46 1.18 -0.05 -1.03 -1.68 K1.5IIIFe-0.5 2150 0
28 PG 1424+535 WD* 14 25 55.4619829653 +53 15 25.137354831   15.86       PG1159 68 0
29 HE 1429-1209 WD* 14 32 20.7451839082 -12 22 48.257597104   15.7 16.15 16.27   PG1159 20 0
30 SBSS 1446+575 WD* 14 47 34.1185711820 +57 20 53.107785592   17.28 18.05     PG1159 13 0
31 PG 1501+664 WD* 15 02 09.6296551839 +66 12 19.146114550   16.07 16.37     DZQ1 151 0
32 HS 1517+7403 WD* 15 16 46.4249329771 +73 52 06.956578954   16.4   16.9   DO 34 0
33 PG 1520+525 PN 15 21 46.5638122905 +52 22 03.868713843   15.56 16.6     PG1159 101 1
34 PG 1707+427 WD* 17 08 47.6869967260 +42 41 00.558830272   16.18       PG1159 109 0
35 * bet Oph PM* 17 43 28.3526482 +04 34 02.295484 5.150 3.930 2.750 1.96 1.38 K2IIICN0.5 455 0
36 PN A66 43 PN 17 53 32.2767918769 +10 37 24.211581466   14.53 14.71     O7fk 125 0
37 PN K 1-16 PN 18 21 52.1081781582 +64 21 53.413814961   14.44 14.96 15.26   PG1159 233 0
38 SH 2-68 PN 18 24 58.4294144035 +00 51 36.016896875   16.0 16.5     DAOZ.6 122 1
39 MWP 1 PN 21 17 08.2817539788 +34 12 27.415871206     12.33     PG1159 173 0
40 V* IR Peg WD* 21 34 08.2124719240 +06 50 57.662044329   16.15       PG1159 112 0
41 NGC 7094 PN 21 36 52.9688055651 +12 47 19.100520826     13.35     ~ 177 0
42 HS 2209+8229 WD? 22 08 25.8770882750 +82 44 51.412639578   16.0       DO/sdO 12 0
43 V* V409 And WD* 23 27 15.9352164958 +40 01 23.428438900   14.1 15.41     DO 69 0
44 PN Jn 1 PN 23 35 53.3216004369 +30 28 06.337286579   15.52 15.62     DOZ 94 0

    Equat.    Gal    SGal    Ecl

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2020.11.25-07:08:25

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