2008A&A...478...57S


Query : 2008A&A...478...57S

2008A&A...478...57S - Astronomy and Astrophysics, volume 478, 57-69 (2008/1-4)

Geometrical tests of cosmological models. II. Calibration of rotational widths and disc scaling relations.

SAINTONGE A., MASTERS K.L., MARINONI C., SPEKKENS K., GIOVANELLI R. and HAYNES M.P.

Abstract (from CDS):

This is the second in a series of three papers dedicated to a new technique to select galaxies that can act as standard rods and standard candles in order to perform geometrical tests on large samples of high redshift galaxies to constrain different cosmological parameters. The goals of this paper are (1) to compare different rotation indicators in order to understand the relation between rotation velocities extracted from observations of the Hα λ6563Å line and the [OII]λ3727Å line; and (2) to determine the scaling relations between physical size, surface brightness and magnitude of disc galaxies and their rotation velocity using the SFI++, a large catalog of nearby galaxies observed at I-band. A good correlation is observed between the rotation curve-derived velocities of the Hα and [OII] observations, as well as between those calculated from velocity histograms, justifying the direct comparison of velocities measured from Hα rotation curves in nearby galaxies and from [OII] line widths at higher redshifts. To provide calibration for the geometrical tests, we give expressions for the different scaling relations between properties of galaxies (size, surface brightness, magnitude) and their rotation speeds. We use Malmquist bias-corrected distances from the SFI++ template Tully-Fisher relation to generate a size-rotation velocity relation with unprecedentedly small scatter. We show how the best size-rotation velocity relation is derived when size is estimated not from disc scale lengths but from the isophotal diameter r23.5, once these have been corrected for inclination and extinction effects.

Abstract Copyright:

Journal keyword(s): galaxies: fundamental parameters - galaxies: evolution - cosmology: cosmological parameters - cosmology: observations - galaxies: high-redshift

Simbad objects: 32

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Number of rows : 32
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 SDSSCGB 59063.2 Sy1 00 11 07.762 +00 35 51.84     19.51     ~ 3 0
2 AGC 101701 G 00 31 23.8957967400 +14 13 13.933653780           ~ 3 0
3 AGC 112393 G 01 44 51.508 +13 36 17.05           ~ 3 0
4 AGC 130796 Sy1 03 18 18.8677322376 +01 07 50.357074116     19.48     ~ 3 0
5 SDSS J032434.87-071050.6 G 03 24 34.876 -07 10 50.61           ~ 3 0
6 AGC 130826 G 03 33 31.861 +01 07 16.93           ~ 4 0
7 AGC 431418 BiC 04 00 00.2505681936 -05 38 52.390993740           ~ 4 0
8 2MASX J07323502+3747343 Sy1 07 32 35.0246274768 +37 47 34.333700316   20.55 19.58     ~ 3 0
9 AGC 171389 G 07 46 08.646 +39 56 58.48           ~ 3 0
10 SDSS J075555.06+364057.7 Sy2 07 55 55.06 +36 40 57.7   20.20 19.37     ~ 3 0
11 2MASX J08043862+4635371 EmG 08 04 38.6530853280 +46 35 36.708564660           ~ 3 0
12 GSC2 N23023322310 Sy1 08 13 45.8459219640 +47 35 52.712137644     19.50     ~ 3 0
13 AGC 181490 G 08 17 50.4107931312 +48 15 11.411810676           ~ 2 0
14 AGC 181488 G 08 43 04.243 -00 07 37.61           ~ 4 0
15 GAMA 378002 G 09 19 57.0031499016 +01 38 51.664392888           ~ 12 0
16 2MASX J09205092+5757588 G 09 20 50.9392969800 +57 57 58.562370720           ~ 2 0
17 SDSS J094412.52+020206.5 G 09 44 12.525 +02 02 06.55           ~ 3 0
18 2dFGRS TGN420Z079 Sy2 10 00 47.6681637048 +02 04 06.702452076 21.07 19.91 18.83 17.374 16.922 ~ 15 0
19 2dFGRS TGN287Z116 rG 10 07 57.334 -00 56 12.61   18.871   17.521   ~ 4 0
20 2dFGRS TGN431Z243 G 10 42 15.527 +01 05 08.35   18.889   17.872   ~ 2 0
21 2dFGRS TGN299Z068 G 11 01 17.785 -01 00 14.94   18.734   17.701   ~ 2 0
22 2dFGRS TGN436Z068 G 11 09 36.971 +01 09 57.89   18.602   17.692   ~ 3 0
23 2dFGRS TGN376Z130 G 11 40 01.246 -00 46 24.38   18.658   17.716   ~ 4 0
24 AGC 212862 G 11 49 19.0329604944 +00 18 06.286595220           ~ 5 0
25 2dFGRS TGN312Z098 G 11 56 40.041 -00 51 28.67   18.377   17.353   ~ 5 0
26 2dFGRS TGN251Z148 rG 12 38 24.6290958576 -01 33 39.557705364   18.351   17.387   ~ 5 0
27 AGC 224090 G 12 48 19.36 +67 23 12.2           ~ 3 0
28 AGC 224092 G 12 55 22.820 +67 23 06.80           ~ 3 0
29 AGC 242064 G 14 10 54.129 +01 37 14.33           ~ 6 0
30 SDSS J141322.75+644404.7 G 14 13 22.7525783808 +64 44 04.752053844           ~ 2 0
31 2dFGRS TGN345Z214 G 14 28 46.2720413136 -00 02 45.699195804   18.68       ~ 6 0
32 AGC 332257 G 23 43 25.98 +00 56 05.2           ~ 1 0

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2022.08.10-07:16:23

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