J/A+A/647/A97 HD 183656 Long-term variations (Wolf+, 2021)
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., K.Vitovsky.
<Astron. Astrophys. 647, A97 (2021)>
=2021A&A...647A..97W 2021A&A...647A..97W (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, spectroscopic ; Equivalent widths ; Radial velocities
Keywords: binaries: spectroscopic - stars: emission-line, Be -
stars: early-type - stars: individual: V923 Aql -
stars: fundamental parameters
Abstract:
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.
Description:
table1.dat: All RVs from the literature, edited and corrected for
misprints. Data sources are identified by spectrographs numbers
(Spg.No.) identical with those in Table D.2.
table2.dat: All RVs with their rms errors (in km/s) measured on
electronic spectra at our disposal. Data sources are identified by
letters identical to those from table D.1. Missing values are denoted
by 9999.99.
table3.dat: Spectrophotometry of Hα line from various published
papers. Whenever needed, we measured intensities on the enlarged plots
of published Figures with Hα profiles. Spectra published by
Catanzaro (2013A&A...550A..79C 2013A&A...550A..79C, Cat. J/A+A/550/A79) were downloaded
and re-measured by us.
table4?.dat: Spectrophotometric quantities measured on electronic
spectra at our disposal for all five considered spectral lines. No
meaningful FWHM values can be obtained for the double emission line
Hα and the blend of HeI 6678 / FeII 6677. Sources of spectra
are identified by letters in column "File", which correspond to those
in table D.1. Missing measurements are denoted by 9.9999.
Objects:
----------------------------------------------------
RA (2000) DE Designation(s)
----------------------------------------------------
19 30 33.12 +03 26 39.9 V923 Aql = HD 183656
----------------------------------------------------
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 24 171 All RVs from the literature, edited and
corrected for misprints
table2.dat 102 190 All RVs with their rms errors measured on
electronic spectra at our disposal
table3.dat 167 29 Spectrophotometry of Hα line from
various published papers
table4a.dat 56 188 Hα emission wings
table4b.dat 38 147 SiII 6371 spectrophotometric quantities measured
on electronic spectra at our disposal
table4c.dat 38 145 SiII 6347 spectrophotometric quantities measured
on electronic spectra at our disposal
table4d.dat 23 158 HeI 6678 wings
table4e.dat 23 155 FeII 6677 sharp core
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See also:
J/A+A/550/A79 : Hα & Hβ lines of northern Be stars (Catanzaro, 2013)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 F10.4 d RJD Reduced Julian date (JD-2400000)
13- 19 F7.3 km/s RV Radial velocity
23- 24 I2 --- SpgNo Spectrograph number (1)
--------------------------------------------------------------------------------
Note (1): Spectrograph number as follows:
-------------------------------------------------------------------------
SpgNo Time interval Nobs Source
(RJD)
-------------------------------------------------------------------------
01 25159.66-28076.68 24 Harper (1937PDAO....7....1H 1937PDAO....7....1H)
02 33103.32-33248.05 2 Bidelman (1950PASP...62...48B 1950PASP...62...48B)
03 33937.00-34107.00 2 Merrill (1952ApJ...116..501M 1952ApJ...116..501M)
04 33110.84-33861.68 5 Gulliver (1976, PhD thesis,
University of Toronto (Canada))
05 33199.70-33861.73 9 Koubsky et al. (1989BAICz..40...31K 1989BAICz..40...31K), file E
06 35743.52-36053.69 3 Koubsky et al. (1989BAICz..40...31K 1989BAICz..40...31K), file F
07 41581.56-43357.73 9 Koubsky et al. (1989BAICz..40...31K 1989BAICz..40...31K), file G
08 40412.84-46216.97 30 Koubsky et al. (1989BAICz..40...31K 1989BAICz..40...31K), file H
09 37486.51-37830.46 12 Palmer et al. (1968RGOB..135..385P 1968RGOB..135..385P)
10 44800.23-44803.21 2 Ringuelet et al. (1984A&A...131....9R 1984A&A...131....9R)
11 43690.39-47100.26 11 Koubsky et al. (1989), file K
12 44446.45-47052.50 12 Koubsky et al. (1989), file L
13 44745.54-47042.36 12 Koubsky et al. (1989), file M
14 46654.60-47111.46 18 Koubsky et al. (1989), file N
15 45610.70-45619.68 3 Ballereau et al. (1987RMxAA..15...29B 1987RMxAA..15...29B)
16 52461.84-58714.38 74 this paper
17 52080.56-59062.43 53 this paper; amateur spectra
18 44052.90-44054.90 2 Alduseva & Kolotilov (1980ATsir1111....2A 1980ATsir1111....2A)
10 44450.75 1 Ringuelet & Sahade (1981PASP...93..594R 1981PASP...93..594R)
19 46584.56-48799.61 9 Denizman et al. (1994Ap&SS.222..191D 1994Ap&SS.222..191D)
20 54653.60-55011.61 5 Catanzaro (2013A&A...550A..79C 2013A&A...550A..79C) and this paper
-------------------------------------------------------------------------
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 F10.4 d RJD Reduced Julian date (JD-2400000)
14- 19 F6.2 km/s HaweRV Hα wings of emission radial velocity
25- 28 F4.2 km/s e_HaweRV Hα wings of emission radial velocity
rms error
32- 37 F6.2 km/s HaacRV Hα absorption core radial velocity
43- 46 F4.2 km/s e_HaacRV Hα absorption core radial velocity
rms error
49- 55 F7.2 km/s HeIIawRV ?=9999.99 HeII 6678 absorption wings radial
velocity
60- 64 F5.2 km/s e_HeIIawRV ?=0 HeII 6678 absorption wings radial velocity
rms error
67- 73 F7.2 km/s FeIIacRV ?=9999.99 FeII 6677 absorption core radial
velocity
78- 82 F5.2 km/s e_FeIIacRV ?=0 FeII 6677 absorption core radial velocity
rms error
85- 91 F7.2 km/s SiIIacRV ?=9999.99 SiII 6347&6371 absorption cores
radial velocity
96-100 F5.2 km/s e_SiIIacRV ?=0 SiII 6347&6371 absorption cores radial
velocity rms error
102 A1 --- Obs Data sources (G1)
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 F10.4 d RJD Reduced Julian date (JD-2400000)
12- 16 F5.3 --- V Peak intensity of the double emission IV
18- 22 F5.3 --- R Peak intensity of the double emission IR
24- 29 F6.4 --- (V+R)/2 Peak intensity of the double emission
(IV+IR)/2
31- 36 F6.4 --- V/R Peak intensity ratio IV/IR
38- 42 F5.3 --- Ic ?=- Central intensity of the shell
absorption line Ic
44- 49 F6.3 0.1nm EWHa ?=- Hα equivalent width
50- 53 F4.2 0.1nm e_EWHa ? rms error on EWHa
55-167 A113 --- Ref References
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Byte-by-byte Description of file: table4a.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 F10.4 d RJD Reduced Julian date (JD-2400000)
12- 18 F7.4 0.1nm EW Hα equivalent width
20- 25 F6.4 --- V Peak intensity of the double emission IV
27- 32 F6.4 --- R Peak intensity of the double emission IR
34- 39 F6.4 --- Ic Central intensity of the shell absorption
line Ic
41- 46 F6.4 --- V/R Peak intensity ratio IV/IR
48- 53 F6.4 --- (V+R)/2 Peak intensity of the double emission
(IV+IR)/2
56 A1 --- Obs Data sources (G1)
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Byte-by-byte Description of file: table4b.dat table4c.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 F10.4 d RJD Reduced Julian date (JD-2400000)
13- 18 F6.4 0.1nm EW SiII equivalent width
21- 26 F6.4 0.1nm FWHM ?=9.9999 SiII FWHM
29- 34 F6.4 --- Ic ?=9.9999 Central intensity of the shell
absorption line Ic
38 A1 --- Obs Data sources (G1)
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Byte-by-byte Description of file: table4d.dat table4e.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 F10.4 d RJD Reduced Julian date (JD-2400000)
13- 18 F6.4 --- Ic ?=9.9999 Central intensity of the shell
absorption line Ic
23 A1 --- Obs Data sources (G1)
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Global notes:
Note (G1): Data sources as follows:
A = ESO 1.52 m reflector, FEROS spectrograph, EEV 2kx2k detector
B = OHP 1.93-m reflector, Elodie spectrograph, CCD Tektronix 1024x1024,
observer C. Catala
C = DAO 1.22 m reflector, McKellar spectrograph, 4Kx2K SITe CCD detector
D = OND 2.00 m reflector, coude grating spg., CCD SITe5 2030x800 pixel
detector
E = Trieste 0.91-m telescope, REOSC echelle spg., observer G. Catanzaro
F = OND 2.00 m reflector, coude grating spg.,
CCD Pylon Excelon 2048x512 pixel detector
G = Castanet CN212 or C11 LHIRES1 Audine KAF-402ME, observer Ch. Buil
H = Atalaia C14 LHIES3 SBIG ST7 XME, observer J. Ribeiro
I = Paris Saint-Charles C8 or C9 LHIRES3 2400 ATIK460EX, observer V. Desnoux
J = Piera MEADE SC16 LHIRES-B ATIK314L+, observer J. Guarro Flo
K = Fontcaude CN212 LHIRES3-2400 Atik314L+, observer T. Garrel
L = Dijon C8 LHIRES3 ATIK314L+, observer A. Favaro
M = Grande Vallee TSC225 LHIRES3 ST8XMe, observer E. Barbotin
N = C.A.L.C. C11 LHIRES-2400 QSI683ws, observer J. Montier
O = Bellavista C9 LHIRES3 1200 SXVR-H694, observer P. Berardi
P = St Maurice C11 LHIRES3 2400 QSI583, observer G. Martineau
Q = Canigou SCT LHIRES3-2400 ST8, observer P. Lailly
R = Verny C11 LHIRES3 194-2400t35-QSI516S, observer F. Houpert
S = Chelles C14 eShel ATIK460, observer T. Lemoult
T = Bussum C11 L200 ATIK 314L+, observer A. de Bruin
U = Alpha 0.51 m Cassegrain, LHIRESIII-2400, observer C. Sawicki
V = Manhattan LX200 12" LHIRES 2400 35u ATIK460EX, obsever K. Graham
W = Tourbiere RC400 Astrosib-Eshel-ATIK460EX, observer O. Garde
X = Revel C11 eShel ATIK460, observer O. Thizy
Y = Desert Wing, C11 LHIRES3-2400 ATIK460EX, observer A. Stiewing
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Acknowledgements:
Marek Wolf, marekwolf(at)seznam.cz
(End) Patricia Vannier [CDS] 01-Feb-2021