J/ApJ/656/437 LS I +61 303 radial velocities and Halpha EW (Grundstrom+, 2007)
Joint Hα and X-ray observations of massive X-ray binaries.
II. The Be X-ray binary and microquasar LS I +61 303.
Grundstrom E.D., Caballero-Nieves S.M., Gies D.R., Huang W., McSwain M.V.,
Rafter S.E., Riddle R.L., Williams S.J., Wingert D.W.
<Astrophys. J., 656, 437-443 (2007)>
=2007ApJ...656..437G 2007ApJ...656..437G
ADC_Keywords: Binaries, spectroscopic ; Binaries, X-ray ; Radial velocities ;
Equivalent widths
Keywords: binaries: spectroscopic - stars: early-type -
stars: emission-line, Be - stars: individual (LS I +61 303) -
stars: neutron - stars: winds, outflows
Abstract:
We present the results of an Halpha monitoring campaign on the BeXRB and
microquasar system LS I +61 303. We use radial velocity measurements
of HeI lines in our spectra to reevaluate the orbital elements and to
better establish the time of periastron. We list equivalent widths and
other parameters for the Halpha emission line and discuss the orbital
phase related variations observed.
Objects:
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RA (2000) DE Designation(s)
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02 40 31.7 +61 13 46 LS I +61 303 = V* V615 Cas
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 83 100 Radial Velocity and Hα Measurements
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See also:
J/ApJ/656/431 : LS I +65 10 radial velocities and Halpha EW (Grundstrom+, 2007)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 11 F11.3 d HJD Mid-exposure Heliocentric Julian Date
13- 17 F5.3 --- Phase Orbital phase (Taylor & Gregory,
1982ApJ...255..210T 1982ApJ...255..210T)
19- 23 F5.1 km/s RV Radial velocity
25 A1 --- f_RV [a] Flag on RVel (1)
27- 31 F5.1 km/s (O-C) Observed minus calculated residual from the fit
33- 37 F5.1 km/s VISM Interstellar line offset
39- 44 F6.2 0.1nm EWHa Hα equivalent width in Angstroms (2)
46- 50 F5.1 km/s RV(W) Radial velocity from cross-correlating
Gaussians with Hα profile wings
52- 57 F6.1 km/s RV(V) Radial velocity of violet Hα peak
59- 63 F5.1 km/s RV(R) Radial velocity of red Hα peak
65- 68 F4.2 --- Ratio Ratio of violet to red equivalent widths
70- 73 F4.2 --- V/R The peak violet to red peak intensity ratio
75- 78 F4.2 0.1nm FWHM(V) Full-Width at Half-Maximum of violet Hα
peak
80- 83 F4.2 0.1nm FWHM(R) Full-Width at Half-Maximum of red Hα peak
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Note (1): a = Assigned zero weight.
Note (2): Includes the full extent of the line wings.
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History:
From electronic version of the journal
References:
Grundstrom et al., Paper I 2007ApJ...656..431G 2007ApJ...656..431G, Cat. J/ApJ/656/431
Grundstrom et al., Paper III 2007ApJ...660.1398G 2007ApJ...660.1398G, Cat. J/ApJ/660/1398
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 10-Dec-2008