J/AJ/164/194 UBVRI photometry of the eclipsing system V490 Sct (Volkov+, 2022)
Apsidal Motion and Physical Parameters in the Eclipsing System V490 Sct.
Volkov I.M., Kravtsova A.S.
<Astron. J., 164, 194 (2022)>
=2022AJ....164..194V 2022AJ....164..194V
ADC_Keywords: Binaries, eclipsing; Photometry, UBVRI
Keywords: Apsidal motion ; Stellar masses ; Eclipsing binary stars ;
Stellar radii ; Stellar effective temperatures
Abstract:
We report long-term UBVRIRcIc photometry of the highly eccentric 12.04
day detached eclipsing binary V490Sct (V=13.1, B9.5+A0,e=0.40), which
we use to determine its relative and absolute parameters. The absolute
masses, radii, and temperatures are MA=2.33±0.07M☉,
RA=1.90±0.04R☉, and TA=9960±60K for the primary and
MB=2.23±0.07M☉, RB=1.86±0.04R☉, and TB=9700±80K
for the secondary. The system displays a slow periastron advance that
is dominated by General Relativity (GR). Our measurement,
ω=0.86deg/century, is 32% less then the expected rate,
ω=1.24deg/century, which has an 83% contribution from GR. A
comparison with current stellar evolution models shows a good match to
the measured properties at an age of about 130Myr and Solar abundance.
The photometric parallax of the system π=0.73±0.04mas, matches
the GAIA DR2 value, π=0.76± 0.04mas.
Description:
The details of observations are given in Table 1.
Objects:
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RA (2000) DE Designation(s)
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18 58 27.39 -13 51 59.7 V490 Sct = TIC 310752204
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 105 11 Observation log
table7.dat 24 4748 UBVRRcIIc photometry
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See also:
B/gcvs : General Catalogue of Variable Stars (Samus+, 2007-2017)
J/ApJ/469/355 : Teff, B-V and BC relation (Flower, 1996)
J/A+AS/141/371 : Low-mass stars evolut. tracks & isochrones (Girardi+, 2000)
J/A+A/424/919 : Stellar models grids. Z=0.02, M=0.8 to 125 (Claret, 2004)
J/ApJ/836/177 : RVs and R-band obs. of the EB* V541 Cyg (Torres+, 2017)
J/ApJS/235/41 : Galactic EB stars eccentric orbits based on ETDs (Kim+, 2018)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 57 A57 --- ObsID Observatory identifier
59- 72 A14 --- Tel Telescope used
74- 79 A6 --- Band Photometric passband
81-105 A25 --- Equip Receiving equipment
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- Filt Filter used (UBVRI)
4- 16 F13.5 d HJD [2453239/2459394] Heliocentric Julian Date
18- 24 F7.4 mag mag [12.1/14.7] Apparent magnitude in Filter
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 29-Nov-2022