2022A&A...666A.136H

Query : 2022A&A...666A.136H

2022A&A...666A.136H - Astronomy and Astrophysics, volume 666A136 (2022/10-1)

V1294 Aql = HD 184279: A bad boy among Be stars or an important clue to the Be phenomenon?

HARMANEC P., BOZIC H., KOUBSKY P., YANG S., RUZDJAK D., SUDAR D., SLECHTA M., WOLF M., KORCAKOVA D., ZASCHE P., OPLISTILOVA A., VRSNAK D., AK H., EENENS P., BAKIS H., BAKIS V., OTERO S., CHINI R., DEMSKY T., BARLOW B.N., SVOBODA P., JONAK J., VITOVSKY K. and HARMANEC A.

Abstract (from CDS):

A reliable determination of the basic physical properties and variability patterns of hot emission-line stars is important for understanding the Be phenomenon and ultimately, the evolutionary stage of Be stars. This study is devoted to one of the most remarkable Be stars, V1294 Aql = HD 184279. We collected and analysed spectroscopic and photometric observations covering a time interval of about 25 000 d (68 yr). We present evidence that the object is a single-line 192.9 d spectroscopic binary and estimate that the secondary probably is a hot compact object with a mass of about 1.1-1.2 M⊙. We found and documented very complicated orbital and long-term spectral, light, and colour variations, which must arise from a combination of several distinct variability patterns. Attempts at modelling them are planned for a follow-up study. We place the time behaviour of V1294 Aql into context with variations known for some other systematically studied Be stars and discuss the current ideas about the nature of the Be phenomenon.

Abstract Copyright: © P. Harmanec et al. 2022

Journal keyword(s): binaries: spectroscopic - stars: emission-line, Be - stars: fundamental parameters

VizieR on-line data: <Available at CDS (J/A+A/666/A136): table3.dat table4.dat table5a.dat table5b.dat table5c.dat table5d.dat>

Simbad objects: 36

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Number of rows : 36
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 * 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
2 * phi And Be* 01 09 30.12562 +47 14 30.4594 3.84 4.18 4.25 4.22 4.27 B5IIIe 244 0
3 HD 7397 * 01 14 03.8259229776 -11 49 55.672072320   9.23 8.68     G1V 21 0
4 HD 7577 * 01 16 32.8541935344 +44 26 41.248161384   8.44 8.49     B9 5 0
5 * 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
6 V* KP Per bC* 03 32 38.9776919424 +44 51 20.734775568 5.7 6.44 6.41     B2IV 133 0
7 * o Per * 03 42 22.6459308614 +33 57 54.093701142 4.13 4.912 4.972     B0.5V 315 0
8 HD 23478 Be* 03 46 40.8712236312 +32 17 24.675566784 6.17 6.708 6.671     B3IV 168 0
9 HD 23887 PM* 03 48 38.9537305296 +00 13 40.298333520   7.143 5.901     K2III 32 0
10 * 28 Tau Be* 03 49 11.2165977912 +24 08 12.156712008 4.73 5.01 5.09   5.08 B8Vne 494 0
11 HD 23675 BS? 03 49 27.5698156680 +52 39 19.453394520 8.265 7.12 6.82     B0.5III 93 0
12 HD 23800 Be* 03 50 25.0719539112 +52 28 54.850298196 8.403 7.20 6.98     B1IV 81 0
13 HD 24431 ** 03 55 38.4221692944 +52 38 28.747965948 6.50 7.11 6.74 6.36 6.10 O9III+B1.5V 173 0
14 HD 41335 Be* 06 04 13.5003372120 -06 42 32.225392980 4.31 5.14 5.21 5.13 5.09 B1V 314 0
15 * ome CMa Be* 07 14 48.6540133346 -26 46 21.603204215 2.90 3.64 3.82 3.80 3.90 B2.5Ve 373 0
16 * lam Boo dS* 14 16 23.0184083839 +46 05 17.895459693 4.31 4.26 4.18 4.16 4.13 A0Va_lB 362 0
17 * 4 Her Be* 15 55 30.5919435384 +42 33 58.291421364 5.23 5.64 5.75   5.82 B9pe 184 0
18 V* V773 Her a2* 16 36 42.9385265832 +15 29 50.827223688   6.296 6.355     A2VpSiSrCr 114 0
19 V* V600 Her SB* 16 36 58.2040305408 +14 28 30.910523016 5.87 6.845 7.028     B0.5III 165 0
20 V* V439 Her RR* 17 42 04.8007374984 +23 48 36.281478456     14.25     ~ 18 0
21 * z Her Be* 17 50 03.3345672768 +48 23 38.948985636 6.380 6.790 6.890     B6IIInp_sh 168 0
22 * 66 Oph Be* 18 00 15.7957050537 +04 22 07.122326765 3.77 4.58 4.60 4.47 4.49 B2Ve 358 0
23 * 68 Oph ** 18 01 45.1974936313 +01 18 18.306278873   4.453 4.429     A0.5Van 153 0
24 V* V986 Oph bC* 18 04 37.3575698448 +01 55 08.375650428 5.23 6.082 6.147     O9.7IIn 121 0
25 HD 180889 * 19 17 31.8630777744 +21 48 49.859962092   7.053 6.887     A3 22 0
26 * 2 Vul Pu* 19 17 43.6353905520 +23 01 31.941802308 4.64 5.43 5.43     B1IIIn 146 0
27 HD 183227 * 19 28 20.7982649208 +02 55 48.118590048 5.45 5.827 5.839     B7III 59 0
28 * c Aql dS* 19 29 00.9869402808 +01 57 01.616825124   5.865 5.783     A0IVp 188 0
29 HD 184279 Be* 19 33 36.9185843448 +03 45 40.793081472 6.63 7.00 7.00     B0V 153 0
30 HD 184663 PM* 19 35 25.1318853336 +02 54 48.983368176   6.770 6.368     F5V 75 0
31 HD 188074 ** 19 51 19.3789612248 +47 22 38.050618692   6.591 6.215     F2V 46 0
32 HD 188252 Pu* 19 52 07.1662436976 +47 55 54.461806320 4.87 5.722 5.897     B2III 84 0
33 HD 188439 Pu* 19 53 01.2463552968 +47 48 27.793662768 5.24 6.147 6.279     B0.5IIIn 111 1
34 HD 217050 Be* 22 57 04.5020619144 +48 41 02.645623680 4.81 5.34 5.43     B4IIIpe 340 1
35 V* V373 Cas SB* 23 55 33.8386958472 +57 24 43.807358448 5.49 6.21 6.00     B0.5II+B3.5/4III/V 157 0
36 HD 224624 * 23 59 27.9023436000 +57 40 15.121330788   7.324 7.205     A0 23 0

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