J/AJ/144/63 Spectroscopic and photometric observations of V335 Ser (Lacy+, 2012)
Absolute properties of the eclipsing binary star V335 Serpentis.
Lacy C.H.S., Fekel F.C., Claret A.
<Astron. J., 144, 63 (2012)>
=2012AJ....144...63L 2012AJ....144...63L
ADC_Keywords: Binaries, eclipsing ; Photometry, UBV ; Radial velocities ;
Photometry, CCD
Keywords: binaries: eclipsing - binaries: spectroscopic -
stars: fundamental parameters - stars: individual (V335 Ser)
Abstract:
V335 Ser is now known to be an eccentric double-lined A1+A3 binary
star with fairly deep (0.5mag) partial eclipses. Previous studies of
the system are improved with 7456 differential photometric
observations from the URSA WebScope and 5666 from the NFO WebScope,
and 67 high-resolution spectroscopic observations from the Tennessee
State University 2m automatic spectroscopic telescope. From dates of
minima, the apsidal period is about 880 years. Accurate (better than
2%) masses and radii are determined from analysis of the two new light
curves and the radial velocity curve. Theoretical models match the
absolute properties of the stars at an age of about 380Myr, though the
age agreement for the two components is poor. Tidal theory correctly
confirms that the orbit should still be eccentric, but we find that
standard tidal theory is unable to match the observed asynchronous
rotation rates of the components' surface layers.
Description:
At Fairborn Observatory from 2010 February through 2011 June we
acquired 67 double-lined spectra with the Tennessee State University
(TSU) 2m automatic spectroscopic telescope, a fiber-fed echelle
spectrograph, and a CCD camera. The echelle spectrograms cover the
wavelength range 4920-7100Å. The resolution was either 0.24 or
0.4Å. In 2010 June, a single spectrum was obtained with the Kitt
Peak National Observatory (KPNO) coude feed telescope, coude
spectrograph, and a CCD camera. That spectrum is centered at 6430Å,
covers a wavelength range of 84Å, and has a resolution of 0.21Å
or a resolving power of just over 30000.
One of the telescopes used to obtain the differential photometry is
the URSA WebScope, which consists of a Meade 10 inch f/6.3 LX-200
telescope with a CCD camera inside a Technical Innovations Robo-Dome.
The observatory is located on top of Kimpel Hall on the Fayetteville
campus. V335 Ser was observed by URSA on 60 nights during parts of
three observing seasons from 2008 April 28 to 2012 January 29. The
other telescope we used is the NFO WebScope, a refurbished 24 inch
Group 128 cassegrain reflector with a CCD camera located near Silver
City, NM. V335 Ser was observed by the NFO on 101 nights during parts
of three observing seasons from 2008 April 11 to 2012 February 5.
Objects:
------------------------------------------------------------------------
RA (2000) DE Designation(s) (Period)
------------------------------------------------------------------------
15 59 05.76 +00 35 44.5 V335 SERPENTIS = HD 143213 (P=3.4498837)
------------------------------------------------------------------------
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table3.dat 39 67 Radial velocity observations from the TSU and
residuals from the fitted orbit
table5.dat 25 7456 URSA differential V magnitudes of V335 Ser
table6.dat 25 5666 NFO differential V magnitudes of V335 Ser
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See also:
B/gcvs : General Catalogue of Variable Stars (Samus+ 2007-2012)
B/sb9 : 9th Catalogue of Spectroscopic Binary Orbits (Pourbaix+ 2004-2013)
III/249 : Stellar radial velocities bibliographic catalog (Malaroda+, 2006)
J/AJ/143/129 : BF Dra photometric & spectroscopic obs. (Lacy+, 2012)
J/A+A/537/A117 : Velocity curves of SW CMa and HW CMa (Torres+, 2012)
J/A+A/546/A61 : Radial velocities for XHIP catalogue (de Bruijne+, 2012)
J/AJ/142/185 : Properties of the EB stars HY Vir (Lacy+, 2011)
J/other/A+ARV/18.67 : Accurate masses and radii of normal stars (Torres+, 2010)
J/other/IBVS/5918 : Minima and maxima of 452 variables (Hubscher+, 2010)
J/other/IBVS/5941 : Minima and maxima of 292 variables (Hubscher+, 2010)
J/AJ/138/1622 : Absolute properties of LV Her (Torres+, 2009)
J/other/IBVS/5830 : Minima and maxima of 292 variables (Hubscher+, 2008)
J/A+A/446/785 : Catalogue of eclipsing variables (Malkov+, 2006)
J/AJ/130/2838 : Velocity and light curves of RW Lac (Lacy+, 2005)
J/AcA/54/207 : Ephemerids of eclipsing binaries (Kreiner, 2004)
J/AJ/128/1340 : Properties of the EB star V459 Cas (Lacy+, 2004)
J/A+A/417/263 : Catalogue of Algol type binary stars (Budding+, 2004)
J/A+A/373/625 : Photometry of lambda Bootis stars (Paunzen+, 2001)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.3 d HJD Heliocentric Julian Date (HJD-2400000)
11- 15 F5.3 --- Phase Phase after periastron
17- 22 F6.1 km/s RVA [-104.7/108.7] Radial velocity for A component
24- 27 F4.1 km/s (O-C)A Radial velocity residual for A component
29- 34 F6.1 km/s RVB [-134.5/112] Radial velocity for B component
36- 39 F4.1 km/s (O-C)B Radial velocity residual for B component
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Byte-by-byte Description of file: table[56].dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 F7.5 --- Phase Orbital phase
9- 13 F5.3 mag DVmag [0.201/0.963] Differential Bessel V band magnitude
15- 25 F11.5 d HJD Heliocentric Julian Date of the observation
(HJD-2400000)
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Sylvain Guehenneux [CDS] 11-Oct-2013