J/ApJ/660/1398 Spectro. monitoring of HDE 245770 and X Per (Grundstrom+, 2007)
Joint Hα and X-ray observations of massive X-ray binaries.
III. The Be X-ray binaries HDE 245770 = A0535+26 and X Persei.
Grundstrom E.D., Boyajian T.S., Finch C., Gies D.R., Huang W.,
McSwain M.V., O'Brien D.P., Riddle R.L., Trippe M.L., Williams S.J.,
Wingert D.W., Zaballa R.A.
<Astrophys. J., 660, 1398-1408 (2007)>
=2007ApJ...660.1398G 2007ApJ...660.1398G
ADC_Keywords: Binaries, spectroscopic ; Binaries, X-ray ; Radial velocities ;
Equivalent widths
Keywords: stars: emission-line, Be -
stars: individual (A0535+26, HDE 245770, X Persei) -
stars: neutron - X-rays: binaries
Abstract:
We present results from an Hα monitoring campaign of the Be X-ray
binary systems HDE 245770 = A0535+26 and X Per. We use the Hα
equivalent widths together with adopted values of the Be star
effective temperature, disk inclination, and disk outer boundary to
determine the half-maximum emission radius of the disk as a function
of time.
Description:
We observed both HDE 245770 and X Per between 1998 August and 2000
December with the Kitt Peak National Observatory 0.9m coude feed
telescope.
Objects:
----------------------------------------------------------
RA (2000) DE Designation(s)
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05 38 54.6 +26 18 57 HDE 245770 = V* V725 Tau
03 55 23.1 +31 02 45 X Per = V* X Per
----------------------------------------------------------
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1a.dat 74 67 HDE 245770 Hα measurements
table1b.dat 74 49 X Per Hα measurements
table3.dat 23 43 X Per IUE radial velocity measurements
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See also:
J/ApJ/656/431 : LS I +65 010 radial velocities & Halpha EW (Grundstrom+, 2007)
J/ApJ/656/437 : LS I +61 303 radial velocities & Halpha EW (Grundstrom+, 2007)
Byte-by-byte Description of file: table1[ab].dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name Star name (HDE 245770 or X Per)
12- 22 F11.3 d HJD Mid-exposure Heliocentric Julian Date
24- 28 F5.3 --- Phase Orbital phase (1)
30- 35 F6.2 0.1nm EW Hα equivalent width (2)
37- 41 F5.1 km/s RV Radial velocity (3)
43- 48 F6.1 km/s RVv ? Violet component radial velocity (4)
50- 54 F5.1 km/s RVr ? Red component radial velocity (4)
56- 59 F4.2 --- EWv/EWr ? The Violet/Red equivalent width ratio
61- 64 F4.2 --- Iv/Ir ? The Violet/Red intensity ratio
66- 69 F4.2 0.1nm FWHMv ? Violet component Full-Width at Half-Maximum (5)
71- 74 F4.2 0.1nm FWHMRr ? Red component Full-Width at Half-Maximum (5)
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Note (1): From the ephemeris of Finger et al. (1994, in The Evolution of
X-Ray Binaries, ed. S.S. Holt & C.S. Day (New York: AIP), 459) for HDE
245770 and from Delgado-Marti et al. (2001ApJ...546..455D 2001ApJ...546..455D) for X Per.
Note (2): Determined by a numerical integration of the line flux over the
range 6536-6590 Angstroms.
Note (3): The radial velocity of the wings based upon a bisector position
determined using the method of Shafter, Szkody & Thorstensen
(1986ApJ...308..765S 1986ApJ...308..765S). This method samples the line wings using
oppositely signed Gaussian functions and determines the mid-point
position between the wings by cross-correlating these Gaussians with
the profile. We used Gaussian functions with FWHM=200 (100) km/s at
sample positions in the wings of ±320 (±190) km/s for HDE 245770
(X Per) respectively.
Note (4): Fits of double-peaked Hα profiles using Gaussian functions
to match the violet and red peaks. These double-Gaussian fits were
restricted to the inner part of the profile (|Δλ|<6Å
for HDE 245770 and <2-4Å for X Per) since the wings are much more
extended that those of Gaussian functions.
Note (5): In units of Angstroms. Note that Hα has only one peak in
the 2008 observations of X Per, so we fit a single Gaussian to the
profiles of these three spectra.
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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- 11 F11.3 d HJD Heliocentric Julian date
13- 17 F5.3 --- Phase Orbital phase
19- 23 F5.1 km/s RV Radial velocity
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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 II 2007ApJ...656..437G 2007ApJ...656..437G, Cat. J/ApJ/656/437
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 08-Mar-2009