J/AJ/148/71 Spectroscopy and photometry of V501 Her (Lacy+, 2014)
Absolute properties of the eclipsing binary star V501 Herculis.
Lacy C.H.S., Fekel F.C.
<Astron. J., 148, 71 (2014)>
=2014AJ....148...71L 2014AJ....148...71L
ADC_Keywords: Binaries, eclipsing ; Photometry, UBV ; Radial velocities
Keywords: binaries: eclipsing - binaries: spectroscopic -
stars: fundamental parameters - stars: individual: V501 Her
Abstract:
V501 Her is a well detached G3 eclipsing binary star with a period of
8.597687days for which we have determined very accurate light and
radial-velocity curves using robotic telescopes. Results of these data
indicate that the component stars have masses of 1.269±0.004 and
1.211±0.003 solar masses, radii of 2.001±0.003 and 1.511±0.003
solar radii, and temperatures of 5683±100 K and 5720±100K,
respectively. Comparison with the Yonsei-Yale series of evolutionary
models results in good agreement at an age of about 5.1Gyr for a
somewhat metal-rich composition. Those models indicate that the more
massive, larger, slightly cooler star is just beyond core hydrogen
exhaustion while the less massive, smaller, slightly hotter star has
not quite reached core hydrogen exhaustion. The orbit is not yet
circularized, and the components are rotating at or near their
pseudosynchronous velocities. The distance to the system is
420±30pc.
Description:
Differential photometry in the V filter was performed with the URSA
and NFO WebScopes, as described by Lacy et al. 2012 (cat.
J/AJ/144/167) and Grauer et al. (2008PASP..120..992G 2008PASP..120..992G). A total of
2939mag was obtained from the URSA WebScope from 2010 February 18 to
2012 July 18, and a total of 7267mag was obtained from the NFO
WebScope from 2009 April 24 to 2014 April 1. The differential
photometry is given in Tables 2 and 3.
From 2010 March through 2014 April we obtained 63 spectrograms of V501
Her at two different observatories (Table5).
The vast majority of our spectra, 58 of them, were acquired at
Fairborn Observatory in southeast Arizona with the Tennessee State
University 2m Automatic Spectroscopic Telescope (AST) and a fiber-fed
echelle spectrograph.
In 2010 we acquired an additional five spectra with the Kitt Peak
National Observatory (KPNO) coude feed telescope, coude spectrograph,
and a TI CCD. Those spectrograms were centered at 6430Å, have a
wavelength range of 84Å, and a resolution of 0.21Å or a
resolving power of over 30000.
Objects:
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RA (ICRS) DE Designation(s) (Period)
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17 35 43.46 +30 38 35.1 V501 Herculis = BD+30 3029 (P=8.597687)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 17 2939 URSA differential photometry of V501 Her
(URSA WebScope at Kimpel Observatory, Arkansas)
table3.dat 17 7360 NFO differential photometry of V501 Her
(NFO WebScope near Silver City, New Mexico)
table5.dat 48 63 Radial velocity observations and residuals from
the fitted orbit
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See also:
B/sb9 : 9th Catalogue of Spectroscopic Binary Orbits (Pourbaix+ 2004-2014)
B/gcvs : General Catalogue of Variable Stars (Samus+ 2007-2013)
J/AJ/147/148 : Spectroscopy and photometry of AP And (Lacy+, 2014)
J/AJ/147/1 : Spectroscopy and photometry of HP Aur (Lacy+, 2014)
J/AJ/144/167 : Photometry and spectroscopy of CF Tauri (Lacy+, 2012)
J/AJ/142/185 : Properties of the eclipsing binary stars HY Vir (Lacy+, 2011)
Byte-by-byte Description of file: table[23].dat
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Bytes Format Units Label Explanations
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1- 11 F11.5 d HJD Heliocentric Julian Date (HJD-2400000)
13- 17 F5.3 mag DVmag Differential V band magnitude
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 9 F9.3 d HJD Heliocentric Julian Date (HJD-2400000)
11- 15 F5.3 --- Phase Phase from periastron
17- 22 F6.1 km/s RV1 Primary radial velocity
24- 27 F4.1 km/s O-C1 Primary (O-C) residual
29- 34 F6.1 km/s RV2 Secondary radial velocity
36- 39 F4.1 km/s O-C2 Secondary (O-C) residual
41- 48 A8 --- Obs Observatory (Fairborn or KPNO) (1)
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Note (1): The two different observatories are:
Fairborn = Fairborn Observatory in southeast Arizona;
KPNO = Kitt Peak National Observatory.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Sylvain Guehenneux [CDS] 28-Nov-2014