J/AJ/153/248 Spectroscopy of V Tri (Ren+, 2017)
Photometric and spectroscopic observations of the Algol type binary V triangle.
Ren A.B., Zhang X.B., Fu J.N., Zhang Y.P., Cang T.Q., Fox-Machado L.,
Li C.Q., Khokhuntod P., Luo Y.P.
<Astron. J., 153, 248-248 (2017)>
=2017AJ....153..248R 2017AJ....153..248R (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, eclipsing ; Radial velocities
Keywords: binaries: eclipsing - stars: fundamental parameters -
stars: individual: V Tri
Abstract:
Time-series, multi-color photometry and high-resolution spectra of the
short-period eclipsing binary V Tri were obtained through observation.
The completely covered light and radial velocity (RV) curves of the
binary system are presented. All times of light minima derived from
both photoelectric and CCD photometry were used to calculate the
orbital period and new ephemerides of the eclipsing system. The
analysis of the O-C diagram reveals that the orbital period is
0.58520481 days, decreasing at a rate of dP/dt=-7.80x10-8 day/yr.
The mass transfer between the two components and the light-time-travel
effect due to a third body could be used to explain the period
decrease. However, a semi-detached configuration with the lower-mass
component filling and the primary nearly filling each of their Roche
lobes was derived from the synthesis of the light and RV curves by
using the 2015 version of the Wilson-Devinney code. We consider the
period decrease to be the nonconservative mass transfer from the
secondary component to the primary and the mass loss of the system,
which was thought to be an EB type, while it should be an EA type
(semi-detached Algol-type) from our study. The masses, radii, and
luminosities of the primary and secondary are 1.60±0.07M☉,
1.64±0.02R☉, and 14.14±0.73L☉ and 0.74±0.02M☉,
1.23±0.02R☉, and 1.65±0.05L☉, respectively.
Description:
The spectroscopic observations for V Tri were carried out with the
2.12m telescope at the Observatorio Astronemico Nacional on the
Sierra San Pedro Martir (OAN-SPM) in Mexico on 2015 November 03 and
05. We used a 2048*2048 E2V CCD-4240 to collect the high-resolution
(the maximum resolution is R=18000 at 5000Å) echelle spectra at the
slit size 1''. The spectral range coverage was from 3800 to 7100Å
Objects:
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RA (ICRS) DE Designation(s) (Period)
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01 31 47.10 +30 22 01.7 V* V Tri = GSC 02293-01403 (P=0.58520481)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 56 3 Main feature parameters of the variable,
comparison, and check stars
table3.dat 25 10 Heliocentric radial velocities of the primary
component for V Tri
table4.dat 51 81 Photoelectric and CCD times of light minima of
V Tri along with the residuals computed from
the quadratic ephemerides
refs.dat 69 34 References
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See also:
J/other/IBVS/5984 : Minima and maxima of 503 variables (Hubscher, 2011)
J/other/IBVS/5918 : Minima and maxima of 452 variables (Hubscher+, 2010)
J/other/JAVSO/38.183 : Time of minima of eclipsing binaries (Samolyk+, 2010)
J/other/IBVS/5830 : Minima and maxima of 292 variables (Hubscher+, 2008)
J/other/IBVS/5761 : Minima and maxima of 389 variables (Hubscher+, 2007)
J/other/IBVS/5731 : Minima and maxima of 816 variables (Hubscher+, 2006)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Star Star
12- 13 I2 h RAh Hour of Right Ascension (J2000)
15- 16 I2 min RAm Minute of Right Ascension (J2000)
18- 23 F6.3 s RAs Second of Right Ascension (J2000)
25 A1 --- DE- Sign of the Declination (J2000)
26- 27 I2 deg DEd Degree of Declination (J2000)
29- 30 I2 arcmin DEm Arcminute of Declination (J2000)
32- 36 F5.2 arcsec DEs Arcsecond of Declination (J2000)
38- 42 F5.2 mag Bmag The B-band magnitude
44- 48 F5.2 mag Vmag ? The V-band magnitude
50- 53 F4.2 mag B-V ? The B-V color index
55- 56 A2 --- SpT Spectral type
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 10 F10.4 d HJD Heliocentric Julian Date (HJD-2400000)
12- 17 F6.4 --- Phase Phase
19- 22 I4 km/s RV Radial velocity
24- 25 I2 km/s e_RV Error in RV
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 10 F10.4 d HJD Heliocentric Julian Date (HJD-2400000) of
light minimum time
12- 17 F6.4 d e_HJD ? Error in HJD
19- 21 A3 --- Meth Method (CCD or pe=photoelectric)
23- 24 A2 --- Min Minimum type (I or II)
26- 32 F7.1 --- E Epoch number
34- 40 F7.4 d L(O-C) The (O-C) linear residual for the time of
light minimum
42- 48 F7.4 d LQ(O-C) The (O-C) quadratic residual for the time of
light minimum
50- 51 I2 --- Ref [1/34] Reference; in refs.dat file
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Ref Reference code
4- 22 A19 --- BibCode Bibliographic code
24- 43 A20 --- Auth Author's name
45- 69 A25 --- Cat Catalog in VizieR database
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History:
From electronic version of the journal
(End) Sylvain Guehenneux [CDS] 09-Aug-2017