J/AJ/136/1557 HD 46703 spectroscopy and photometry (Hrivnak+, 2008)
A spectroscopic and photometric study of the metal-poor, pulsating,
post-asymptotic giant branch binary HD 46703.
Hrivnak B.J., Van Winckel H., Reyniers M., Bohlender D., Waelkens C., Lu W.
<Astron. J., 136, 1557-1565 (2008)>
=2008AJ....136.1557H 2008AJ....136.1557H
ADC_Keywords: Binaries, spectroscopic ; Radial velocities ; Photometry, Geneva ;
Photometry, UBV ; Spectroscopy
Keywords: binaries: spectroscopic - stars: abundances -
stars: AGB and post-AGB - stars: chemically peculiar -
stars: individual (HD 46703)
Abstract:
The metal-poor post-asymptotic giant branch (AGB) star HD 46703 is
shown to be a single-line spectroscopic binary with a period of
600-days, a high velocity of -94km/s, and an orbital eccentricity of
0.3. Light-curve studies show that it also pulsates with a period of
29-days. High-resolution, high signal-to-noise spectra were used for a
new abundance study.
Description:
The monitoring of the radial velocity was performed at the
Observatoire de Haute-Provence (OHP) from 1989 to 1996 and at the
Dominion Astrophysical Observatory (DAO) from 1991 to 1995.
Photometric observations of HD 46703 were carried out from 1986
through 2006 at three different observatories with two different
photometric systems.
Objects:
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RA (2000) DE Designation(s)
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06 37 52.4 +53 31 02 HD 46703 = V* V382 Aur
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 22 72 List of radial velocity observations of HD 46703
table3.dat 40 84 Differential magnitudes of HD 46703 from VUO
(Valparaiso University Observatory)
table4.dat 68 107 Magnitudes of HD 46703 on the
Geneva seven-filter system
table5.dat 41 284 Measurements of individual lines of each ion
used in the abundance analysis of HD 46703
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJD Heliocentric Julian date
14- 20 F7.2 km/s RV Radial velocity
22 I1 --- Obs Observation reference (1)
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Note (1): Observation reference as follows:
1 = Luck & Bond (1984ApJ...279..729L 1984ApJ...279..729L), where we have estimated the
fractional JD based on the observing data and location
2 = OHP-CORAVEL
3 = DAO-RVS
4 = derived from our high-resolution spectra used for the abundance analysis
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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- 12 F12.4 d HJD-V Heliocentric Julian Date for V band
14- 19 F6.3 mag DVmag Differential Magnitude in V
22- 33 F12.4 d HJD-Rc ? Heliocentric Julian Date for Rc band
35- 40 F6.3 mag DRcmag ? Differential Magnitude in Rc
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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- 11 F11.3 d HJD Heliocentric Julian Date minus (1)
14- 20 F7.3 mag Umag Magnitude in Geneva U band
22- 28 F7.3 mag Bmag Magnitude in Geneva B band
30- 36 F7.3 mag Vmag Magnitude in Geneva V band
38- 44 F7.3 mag B1mag Magnitude in Geneva B1 band
46- 52 F7.3 mag B2mag Magnitude in Geneva B2 band
54- 60 F7.3 mag V1mag Magnitude in Geneva V1 band
62- 68 F7.3 mag Gmag Magnitude in Geneva G band
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Note (1): Observations from 2446742-2450101 were made with the Swiss 0.7-m
telescope and from 2452205-2453090 with the Flemish 1.2-m Mercator telescope.
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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- 5 A5 --- Ion Ion designation
7- 13 F7.2 0.1nm lambda Wavelength in Angstroms
15- 19 F5.2 eV ExPot Excitation potential
21- 26 F6.3 [-] log(gf) Log of oscillator strength
28- 30 I3 10-13m EW Equivalent width in milli-Angstroms
32- 35 F4.2 [-] log(e) Absolute abundance (log(N/H)+12) (1)
37- 41 F5.2 [-] Dlog(e) Abundance difference between this line
and the mean abundance (1)
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Note (1): The following model atmosphere was adopted: Teff=6250K,
log(g)=1.0, Vt=3.0km/s, [M/H]=-1.5.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 07-Apr-2011