J/AJ/133/2669 Velocity and Hα width of 22 Vul (Eaton+, 2007)
Properties of the ζ Aur-type binary system 22 Vul = QS Vul.
Eaton J.A., Shaw F.G.
<Astron. J., 133, 2669-2678 (2007)>
=2007AJ....133.2669E 2007AJ....133.2669E
ADC_Keywords: Binaries, eclipsing ; Equivalent widths ; Radial velocities
Keywords: binaries: eclipsing - stars: late-type - stars: winds, outflows
Abstract:
The 22 Vul system is important for studying the winds and
chromospheres of cool evolved stars because the G4 I component is
rotating rapidly and probably faster than synchronously. We discuss
the system's physical properties in the context of a wide range of
constraints on them and propose values that may be marginally better
than previous ones. We use Hα spectroscopy to assess the
variability of the cool star's wind, and archival IUE observations to
measure variation of density in the wind and rotation of the
chromosphere.
Description:
We collected two sets of high-dispersion spectra over the years.
First, we have data from the stellar spectrograph of the McMath-Pierce
Solar Telescope at the National Solar Observatory (NSO).
Second, we have obtained 3 years' worth of red observations with the
echelle spectrograph on the Tennessee State University (TSU) Automatic
Spectroscopic Telescope at Fairborn Observatory in southern Arizona.
Objects:
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RA (2000) DE Designation(s)
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20 15 30.2 +23 30 32 22 Vul = V* QS Vul
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
rv.dat 22 153 22 Vul radial velocity from AST and NSO
ew.dat 28 153 22 Vul Halpha equivalent widths AST and NSO
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Byte-by-byte Description of file: rv.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJD Heliocentric Julian Date
14- 18 F5.1 km/s HRV The G supergiant primary radial velocity (1)
20- 22 A3 --- Inst [NSO AST] Intrument used
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Note (1): Heliocentric but not corrected to the IAU system.
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Byte-by-byte Description of file: ew.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJD Heliocentric Julian Date
14- 18 F5.3 0.1nm EW1 ? Hα 6560.90-6564.75 equivalent width (1)
20- 24 F5.3 0.1nm EW2 ? Hα 6559.80-6560.90 equivalent width (1)
26- 28 A3 --- Inst [NSO AST] Intrument used
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Note (1): Equvialent widths are reported in units of Angstroms where the
wavelengths of the profile are in the rest frame of the star.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 27-May-2009