2021A&A...647A..97W


Query : 2021A&A...647A..97W

2021A&A...647A..97W - Astronomy and Astrophysics, volume 647A, 97-97 (2021/3-1)

Long-term, orbital, and rapid variations of the Be star V923 Aql = HD 183656.

WOLF M., HARMANEC P., BOZIC H., KOUBSKY P., YANG S., RUZDJAK D., SLECHTA M., AK H., BAKIS H., BAKIS V., OPLISTILOVA A. and VITOVSKY K.

Abstract (from CDS):

We present the latest results of a long-term observational project aimed at observing, collecting from the literature, and homogenising the light, colour, and spectral variations of the well-known emission-line Be star V923 Aql. Our analysis of these parameters confirms that all of the observables exhibit cyclic changes with variable cycle length between about 1800 and 3000 days, so far documented for seven consecutive cycles. We show that these variations can be qualitatively understood within the framework of the model of one-armed oscillation of the circumstellar disk, with a wave of increased density and prograde revolution in space. We confirm the binary nature of the object with a 214.716 day period and estimate the probable system properties. We also confirm the presence of rapid light, and likely also spectral changes. However, we cannot provide any firm conclusions regarding their nature. A quantitative modelling study of long-term changes is planned as a follow-up to this work.

Abstract Copyright: © ESO 2021

Journal keyword(s): binaries: spectroscopic - stars: emission-line, Be - stars: early-type - stars: individual: V923 Aql - stars: fundamental parameters

VizieR on-line data: <Available at CDS (J/A+A/647/A97): table1.dat table2.dat table3.dat table4a.dat-table4e.dat>

Simbad objects: 12

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Number of rows : 12
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 * gam Cas Be* 00 56 42.5310945 +60 43 00.264089 1.18 2.29 2.39 2.32 2.40 B0.5IVpe 1189 2
2 HD 20336 Be* 03 19 59.2693390128 +65 39 08.285606820 3.93 4.70 4.85 4.88 5.01 B2.5Vn(e) 219 0
3 * 105 Tau Be* 05 07 55.4349577176 +21 42 17.349368184 5.51 6.08 5.92     B2Ve 174 0
4 * ome CMa Be* 07 14 48.6538664 -26 46 21.609714 2.90 3.64 3.82 3.80 3.90 B2.5Ve 350 0
5 * z Her Be* 17 50 03.3345672768 +48 23 38.948985636 6.380 6.790 6.890     B6IIInp_sh 160 0
6 * bet Lyr EB* 18 50 04.7952472 +33 21 45.609978 2.85 3.42 3.42 3.31 3.29 B8.5Ib-II 920 0
7 HD 183227 * 19 28 20.7982649208 +02 55 48.118590048 5.45 5.827 5.839     B7III 55 0
8 * c Aql dS* 19 29 00.9869402808 +01 57 01.616825124   5.865 5.783     A0IVp 179 0
9 HD 183387 * 19 29 18.0225976176 +00 14 45.867845796   7.541 6.245     K2III 19 0
10 HD 183656 Be* 19 30 33.1219108488 +03 26 39.860267784 5.69 6.064 6.082     B7III 128 0
11 HD 184663 PM* 19 35 25.1318853336 +02 54 48.983368176   6.770 6.368     F5V 72 0
12 * f01 Cyg Be* 20 59 49.5541247496 +47 31 15.363746436 3.77 4.71 4.75 4.62 4.63 B1.5Vnne 491 0

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2023.06.08-04:54:02

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