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J/ApJ/554/L129 X-ray luminosity-velocity dispersion relation (Mahdavi+, 2001)
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The L_X_-{sigma} relation for galaxies and clusters of galaxies.
Mahdavi A., Geller M.J.
<Astrophys. J. 554, L129 (2001)>
=2001ApJ...554L.129M
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ADC_Keywords: Clusters, galaxy ; X-ray sources ; Velocity dispersion
Keywords: galaxies: clusters: general - X-rays: galaxies
Abstract:
We demonstrate that individual elliptical galaxies and clusters of
galaxies form a continuous X-ray luminosity-velocity dispersion
(L_X_-{sigma}) relation. Our samples of 280 clusters and 57 galaxies
have L_X_ {prop.to}{sigma}^4.4^ and L_X_{prop.to}{sigma}^10^,
respectively. This unified L_X_-{sigma} relation spans 8 orders of
magnitude in L_X_ and is fully consistent with the observed and
theoretical luminosity-temperature scaling laws. Our results support
the notion that galaxies and clusters of galaxies are the luminous
tracers of similar dark matter halos.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
galaxy.dat 90 84 Catalog of galaxies
system.dat 88 280 Catalog of clusters and groups
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See also:
J/ApJS/97/141 : Einstein sample multiparametric analysis. I. (Eskridge+ 1995)
J/ApJ/518/69 : Deep Optical Catalog of galaxy systems (Mahdavi+, 1999)
J/ApJ/534/114 : RASSCALS: X-ray and optical study (Mahdavi+, 2000)
Byte-by-byte Description of file: galaxy.dat system.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- Name Object name conforming to NED standard
19- 20 I2 h RAh Righ ascension (J2000)
22- 23 I2 min RAm Righ ascension (J2000)
25- 28 F4.1 s RAs Righ ascension (J2000)
30 A1 --- DE- Declination sign (J2000)
31- 32 I2 deg DEd Declination (J2000)
34- 35 I2 arcmin DEm Declination (J2000)
37- 38 I2 arcsec DEs Declination (J2000)
40- 45 F6.3 --- z redshift
47- 50 F4.2 [km/s] logsigma log of velocity dispersion
52- 55 F4.2 [km/s] e_logsigma rms uncertainty on logsigma
57- 61 F5.2 [solLum] logLXbol log of bolometric X-ray luminosity
(H_0_=50km/s/Mpc)
63- 66 F4.2 [solLum] e_logLXbol rms uncertainty on logLXbol
68- 69 A2 --- r_logLXbol [BFHR ] Reference for LXbol and sigma (1)
71- 90 A20 --- Com Other identifications / Comments (2)
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Note (1): bolometric X-ray luminosity reference:
F: X-ray luminosity is from Eskridge, Fabbiano, & Kim
(1995, Cat. <J/ApJS/97/141>)
B: X-ray luminosity is from Beuing et al. (1999MNRAS.302..209B)
H: X-ray luminosity is from Helsdon & Ponman (2000MNRAS.315..356H)
R: X-ray luminosity is from Mahdavi et al.
(2000, Cat. <J/ApJ/534/114>);
velocity dispersion is from ongoing survey described in Mahdavi
et al. (1999, Cat. <J/ApJ/518/69>).
HR: Luminosity is from Helsdon & Ponman (2000MNRAS.315..356H);
velocity dispersion is from Mahdavi et al. (1999, Cat. <J/ApJ/518/69>)
Note (2): Comments:
AGN: Galaxy contains an active galactic nucleus (rejected)
GR: Galaxy X-ray emission is continuous with larger group or
cluster emission (rejected)
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History:
Copied at http://tdc-www.harvard.edu/lxsigma
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(End) James Marcout, Patricia Bauer [CDS] 25-Sep-2001