J/ApJ/595/1206 ROSAT view of Hipparcos F stars (Suchkov+, 2003)
ROSAT view of Hipparcos F stars.
Suchkov A.A., Makarov V.V., Voges W.
<Astrophys. J. 595, 1206 (2003)>
=2003ApJ...595.1206S 2003ApJ...595.1206S
ADC_Keywords: Stars, F-type ; X-ray sources ; Cross identifications
Keywords: binaries: general - stars: activity - stars: evolution -
stars: kinematics - stars: pre-main-sequence - X-rays: stars
Abstract:
For a set of 11900 F stars that have uvby photometry and are in the
Hipparcos (Cat. I/239) catalog, we have found 1980 X-ray
counterparts (∼17%) in the ROSAT All-Sky Surveys (RASS, Cat. IX/10
and IX/29). In this paper we analyze X-ray properties of these ROSAT
F stars and compare that sample with the entire set of our F stars.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 101 1980 HIPPARCOS F stars with ROSAT counterparts
table4.dat 40 32 Strong X-Ray Emitters, logLX>29.5,
among Metal-poor F Stars, [Fe/H]≤-0.4
table5.dat 157 56 Stars with Extreme X-Ray Luminosity, logLX>30.4
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See also:
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999)
IX/29 : ROSAT All-Sky Survey Faint Source Catalog (Voges+ 2000)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HIP HIPPARCOS identification number
8- 11 A4 --- --- [RSX-]
12- 27 A16 --- RSX ROSAT All-Sky Surveys identification
29- 33 F5.1 arcsec Offset ROSAT source offset from HIPPARCOS position
35- 39 F5.3 ct/s CRT ROSAT source X-ray count rate
41- 45 F5.3 ct/s e_CRT Error in CRT
47- 51 F5.2 --- HR1 Hardness ratio (G1)
53- 56 F4.2 --- e_HR1 Error in HR1
58- 62 F5.2 [10-7W] logLX Log of the X-ray luminosity in units of erg/s
64- 68 F5.2 mag VMag Absolute V band magnitude (2)
70- 74 F5.2 mag DelMc0 The overluminosity parameter
76- 79 I4 K Teff Effective temperature
81- 85 F5.2 [Sun] [Fe/H] ? Metallicity
87 A1 --- u_[Fe/H] [?] Indicates an unknown [Fe/H]
89- 94 F6.3 mag E(b-y) The Stromgren (b-y) excess
96-100 F5.1 pc Dist Distance
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Note (2): Corrected for reddening using E(b-y)
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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- 6 I6 --- HIP HIP number
8- 12 F5.2 [10-7W] logLX X-ray luminosity
14- 18 F5.2 --- HR1 Hardness ratio (G1)
20- 23 F4.2 mag VMAG Absolute V magnitude
25- 29 F5.2 mag DelMc0 Overluminosity parameter, ΔMc0
31- 34 I4 K Teff Effective temperature
36- 40 F5.2 [Sun] [Fe/H] Metallicity
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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- 6 I6 --- HIP HIP number
8- 16 A9 --- Name Name
18- 33 A16 --- ROSAT ROSAT designation (JHHMMSS.s+DDMMSS)
35- 40 A6 --- Type Type of activity (1)
42- 47 F6.2 pc Dist Distance
49- 54 F6.2 deg RAdeg Right ascension in decimal degrees (J2000)
56- 61 F6.2 deg DEdeg Declination in decimal degrees (J2000)
63- 67 F5.2 [10-7W] logLX X-ray luminosity
69- 73 F5.2 --- HR1 Hardness ratio (G1)
75- 79 F5.2 mag DelMc0 Overluminosity parameter, ΔMc0
81- 85 F5.2 [Sun] [Fe/H] ? Metallicity
86 A1 --- u_[Fe/H] [?] Uncertainty flag on [Fe/H]
88- 92 F5.2 mag VMag Absolute V magnitude
94-157 A64 --- Com Comments
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Note (1): Type of activity is abbreviated as follows:
RS = RS CVn type stars
XO = other types of short-period active binaries
XG = active evolved stars without spectroscopic binarity
Y = young stars
BY = apparently single BY Dratype variable stars
WU = WU UMatype binaries
? = question mark (?) for unknown type
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Global notes:
Note (G1): HR1 = (H-S)/(H+S) where H and S are source counts in the hard
(0.5 to 2.0keV) and soft (0.1 to 0.4keV) passbands.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 21-Nov-2003