J/MNRAS/345/1 Shape of CL 1358+62 galaxies (Moller+, 2003)
Discs in early-type lensing galaxies: effects on magnification ratios and
measurements of H0.
Moller O., Hewett P., Blain A.W.
<Mon. Not. R. Astron. Soc. 345, 1 (2003)>
=2003MNRAS.345....1M 2003MNRAS.345....1M
ADC_Keywords: Clusters, galaxy ; Morphology
Keywords: methods: numerical - gravitational lensing -
galaxies: elliptical and lenticular, cD - galaxies: formation -
dark matter - distance scale
Abstract:
Observations of early-type galaxies, both in the local Universe and in
clusters at medium redshifts, suggest that these galaxies often
contain discs or disc-like structures. Using the results of Kelson et
al. (2000ApJ...531..137K 2000ApJ...531..137K) for the incidence of disc-components among
the galaxies in the redshift z=0.33 cluster CL 1358+62, we investigate
the effect of disc structures on the lensing properties of early-type
galaxies. Statistical properties, like magnification cross-sections
and the expected number of quad (four-image) lens systems, are not
affected greatly by the inclusion of discs that contain less than ∼10
per cent of the total stellar mass.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 88 53 Galaxies in CL 1358+62.
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See also:
J/ApJ/498/195 : Spectroscopic survey of CL 1358+62 (Fisher+ 1998)
J/ApJ/500/714 : Color-magnitude relation in CL 1358+62 (Van Dokkum+ 1998)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [FFF98] Sequential number
5- 9 A5 --- MType Morphological type
11- 15 F5.2 mag/arcsec2 <Ih>B Mean surface brightness at the half-light
radius of the bulge (1)
17- 21 F5.3 arcsec rhB Half-light radius of the bulge (1)
23- 27 F5.3 mag/arcsec2 SbB Central surface mass density of the bulge
29- 33 F5.3 arcsec ReB Einstein radius of the bulge
35- 40 F6.3 mag/arcsec2 <Ih> Mean surface brightness at the half-light
radius of bulge and disc (1)
41- 45 F5.3 arcsec rh Half-light radius of the bulge and disc (1)
47- 51 F5.3 mag/arcsec2 Sb Central surface mass density of the bulge
and disc
53- 57 F5.2 mag/arcsec2 <Ihd> Mean surface brightness within the
half-light radius of the bulge and disc (1)
59- 63 F5.3 arcsec rd Disc scalelength (2)
65- 70 F6.3 10+11solMass/arcsec2 Sd Central surface mass density of disc
72- 75 F4.2 arcsec Re Einstein radius of the bulge and disc
77- 81 F5.3 --- fe Bulge fraction (B/T) mass ratio as measured
at the Einstein radius Re (Bulge and disc)
83- 87 F5.3 --- ft B/T mass ratio as measured at R->{infinity)
(Bulge and disc) (3)
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Note (1): The values for <Ih>, rh and <Ihd> are taken directly from
Kelson et al. (2000ApJ...531..137K 2000ApJ...531..137K).
Note (2): The disc scalelength rd is related to the half-light radius
as given in Kelson et al. (2000ApJ...531..137K 2000ApJ...531..137K) by rd=1.688rhd.
In a cosmology with ΩΛ=0.7, ΩM=0.3 and
H0=50km/s/Mpc, 1 arcsec corresponds to 6.6kpc at a redshift of
z=0.33
Note (3): R is the radius of the circular region contained the
projected mass directly measured with gravitational lensing.
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History:
* 07-Nov-2003: From electronic version of the journal
* 09-Oct-2004: Galaxy numbered [FFF98] 423 was a typo, the correct
galaxy number is 433.
(End) James Marcout, Patricia Vannier [CDS] 07-Nov-2003