2022MNRAS.510.2286N

Query : 2022MNRAS.510.2286N

2022MNRAS.510.2286N - Mon. Not. R. Astron. Soc., 510, 2286-2304 (2022/February-3)

Velocity monitoring of γ Cas stars reveals their binarity status.

NAZE Y., RAUW G., CZESLA S., SMITH M.A. and ROBRADE J.

Abstract (from CDS):

The binary status of γ Cas stars has been discussed while theoretically examining the origin of their peculiar X-ray emission. However, except in two cases, no systematic radial velocity monitoring of these stars had been undertaken yet to clarify their status. We now fill this gap using TIGRE, CARMENES, and UVES high-resolution spectroscopy. Velocities were determined for 16 stars, revealing shifts and/or changes in line profiles. The orbit of six new binaries could be determined: the long periods (80-120 d) and small velocity amplitudes (5-7 km s–1) suggest low mass companions (0.6-1 M☉). The properties of the known γ Cas binaries appear similar to those of other Be systems, with no clear-cut separation between them. One of the new systems is a candidate for a rare case of quadruple system involving a Be star. Five additional γ Cas stars display velocity variations compatible with the presence of companions, but no orbital solution could yet be formally established for them hence they only receive the status of 'binary candidate'.

Abstract Copyright: © 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): binaries: general - stars: early-type - stars: emission-line, Be - stars: massive - stars: variables: general

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 - 2026 		#notes
1 * omi Cas Be* 00 44 43.5186007265 +48 17 03.731037403 3.91 4.44 4.50 4.45 4.50 B5IIIe 291 0
2 * gam Cas HXB 00 56 42.5310945 +60 43 00.264089 1.18 2.29 2.39 2.32 2.40 B0.5IVpe 1253 0
3 HD 5408 ** 00 56 46.97166 +60 21 46.2192   5.500 5.566     B7Vn+B9VHgMn+A1V 133 1
4 * phi Per Be* 01 43 39.6379691568 +50 41 19.433124998 3.10 4.02 4.06 3.90 3.88 B1.5V:e-shell 594 0
5 HD 12882 Be* 02 08 45.4368570096 +65 02 14.726502060 7.36 7.940 7.618     B2.5III:[n]e+ 75 0
6 * zet Tau Be* 05 37 38.6854231 +21 08 33.158804 2.22 2.84 3.03 3.06 3.15 B1IVe_shell 751 0
7 HD 41335 Be* 06 04 13.5003372120 -06 42 32.225392980 4.31 5.14 5.21 5.13 5.09 B1V 314 0
8 LS V +22 25 Be* 06 11 49.0761116160 +22 49 32.686712760 11.5 11.788 11.468 11.451   B3V 96 0
9 HD 44458 Be* 06 21 24.7165403448 -11 46 23.666159604 4.74 5.56 5.55 5.38 5.34 B1.5IVe 165 0
10 HD 45314 Be* 06 27 15.7784072112 +14 53 21.212913660 5.91 6.79 6.64     O9:npe 183 0
11 * nu. Gem Be* 06 28 57.7861342 +20 12 43.685624 3.51 4.00 4.14 4.17 4.28 B6IVe 269 0
12 HD 45910 Be* 06 30 32.9373877056 +05 52 01.204796244 6.64 7.18 6.85 6.31 5.81 B2IIIe 234 0
13 HD 45995 Be* 06 31 09.5621343984 +11 15 04.953226644 5.20 6.06 6.14     B1.5Vne 164 0
14 HD 51480 Be* 06 57 09.3836145600 -10 49 28.065280368 6.66 7.24 6.93 7.78   B3/5Ibe 97 0
15 HD 55606 Be* 07 13 34.1003415384 -02 04 39.100526796 8.28 9.01 9.04     B0.5Vnnpe 66 0
16 HD 58978 Be* 07 26 59.4826856664 -23 05 09.689679528 4.51 5.45 5.56 7.05   B0.5IVe 248 0
17 * omi Pup Be* 07 48 05.1686329933 -25 56 13.810593657 3.42 4.43 4.49 4.37 4.37 B1IVe 228 0
18 * r Pup Be* 08 13 29.5172754003 -35 53 58.265647773 3.68 4.66 4.77 4.68 4.77 B1V 199 0
19 HD 90563 Em* 10 25 52.4600540400 -58 47 07.130161932 9.98 10.29 9.86 10.12   OB 32 0
20 HD 93683 Be* 10 47 38.8785531792 -60 37 04.271539296 7.20 8.12 7.87 8.78   O9V+B0V 51 0
21 HD 110432 HXB 12 42 50.2663572384 -63 03 31.052981412 4.79 5.58 5.31     B0.5IVpe 334 0
22 HD 119682 HXB 13 46 32.5709610312 -62 55 24.156893676 7.26 7.978 7.901 8.72   B0Ve 76 0
23 HD 120991 Be* 13 53 57.2397645360 -47 07 41.390612184 5.11 6.03 6.10 6.24 6.34 B2Ve 145 0
24 HD 130437 Be* 14 50 50.2529109240 -60 17 10.355677188 10.20 10.66 10.04 9.93   B1Ve 71 0
25 * del Sco SB* 16 00 20.00528 -22 37 18.1431 1.30 2.20 2.32 2.36 2.49 B0.3IV 776 0
26 * chi Oph Be* 16 27 01.4355697915 -18 27 22.499961252 3.95 4.71 4.43 3.97 3.73 B2Vne 624 0
27 HD 157832 Be* 17 27 54.8113451976 -47 01 34.397043672 5.81 6.636 6.663     B2ne 75 0
28 HD 161103 HXB 17 44 45.7656635952 -27 13 44.478959340 8.44 9.23 9.13 9.12   B0.5III/IVe 95 0
29 HD 161306 Be* 17 45 07.7041298136 -09 48 54.445589568 8.35 8.78 8.30     B3/5Vnne 65 0
30 HD 162718 Be* 17 53 28.4430245688 -24 46 27.644544516 8.94 9.30 8.75 9.38   B3/5ne 61 0
31 HD 316568 Be* 17 54 42.7048988520 -29 43 47.633086740 9.39 9.86 9.66 9.91   B3 39 0
32 * 66 Oph Be* 18 00 15.7957050537 +04 22 07.122326765 3.77 4.58 4.60 4.47 4.49 B2Ve 358 0
33 HD 167128 Be* 18 17 07.5324253562 -56 01 24.057583523 4.62 5.30 5.36 5.32 5.36 B3IIIe 175 0
34 HD 174237 Be* 18 46 43.0891606728 +52 59 16.654686648 5.06 5.80 5.90     B3+F5III 212 0
35 HD 183362 Be* 19 27 36.3966416760 +37 56 28.307118120 5.46 6.20 6.34     B3Ve 119 0
36 HD 194335 Be* 20 23 44.3690462664 +37 28 35.209455780 4.82 5.70 5.90     B2IIIe 161 0
37 BD+47 3129 HXB 20 30 30.8452150680 +47 51 50.717123784 8.95 9.594 9.273 9.273   B0.5V-IIIe 51 0
38 * f01 Cyg Be* 20 59 49.5541247496 +47 31 15.363746436 3.77 4.71 4.75 4.62 4.63 B1.5Vnne 514 0
39 * 60 Cyg Be* 21 01 10.9277453472 +46 09 20.795190696 4.23 5.226 5.432     B1Ve 217 0
40 BD+43 3913 Be* 21 25 02.4437067432 +44 27 06.376740300 9.07 9.33 8.91     B1.5V:nnep 63 0
41 * pi. Aqr Be* 22 25 16.6230017410 +01 22 38.634449478 3.64 4.60 4.64 4.48 4.48 B1III-IVe 436 0
42 * 14 Lac EB* 22 50 21.7785565224 +41 57 12.221400240 5.49 5.961 5.910     B4III 155 0
43 HD 218066 Be* 23 04 02.2270838832 +63 23 48.722060508 7.50 7.97 7.6     B1.5Vn 290 0
44 HD 220058 Be* 23 20 19.0150387584 +55 48 28.075999176 8.05 8.76 8.59     B2 51 0

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