J/MNRAS/398/91 2D kinematic structure of early-type galaxies (Proctor+, 2009)
Probing the 2D kinematic structure of early-type galaxies out to three effective
radii.
Proctor R.N., Forbes D.A., Romanowsky A.J., Brodie J.P., Strader J.,
Spolaor M., Mendel J.T., Spitler L.
<Mon. Not. R. Astron. Soc., 398, 91-108 (2009)>
=2009MNRAS.398...91P 2009MNRAS.398...91P
ADC_Keywords: Galaxies, rotation ; Velocity dispersion
Keywords: stellar dynamics - techniques: spectroscopic - galaxies: general -
galaxies: kinematics and dynamics - galaxies: structure
Abstract:
We detail an innovative new technique for measuring the
two-dimensional (2D) velocity moments (rotation velocity, velocity
dispersion and Gauss-Hermite coefficients h3 and h4) of the stellar
populations of galaxy haloes using spectra from Keck DEIMOS (Deep
Imaging Multi-Object Spectrograph) multi-object spectroscopic
observations. The data are used to reconstruct 2D rotation velocity
maps.
Here we present data for five nearby early-type galaxies to ∼three
effective radii.
Description:
The data used in this work are from three observing runs using DEIMOS
on the Keck-2 telescope. The first observing run was carried out in
2006 November using the 1200l/mm grating centred at ∼7500Å and a
1-arcsec slit. This allows coverage of the calcium triplet at 8498,
8542 and 8662Å at a resolution of ∼1.5Å. The second run was
carried out in 2007 November and the third in 2008 April, both using
the same instrument set-up as the first run.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 61 5 Properties of galaxies featured in this work
table3.dat 82 271 Velocity moment data
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See also:
J/MNRAS/326/473 : Low-luminosity E gal. velocity distribution (Halliday+ 2001)
J/MNRAS/387/1099 : Spectroscopic study of 10 high SB galaxies (Pizzella+, 2008)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Gal Galaxy name
9- 13 A5 --- MType Hubble type
15- 18 F4.1 Mpc Dist Distance
20- 21 I2 arcsec Reff Effective radius
23- 27 F5.1 mag KMAG Absolute K magnitude
29- 31 I3 deg PA Photometric position angle
33- 36 F4.2 --- Kb/a K-band photometric axis ratio
38- 41 I4 km/s Vsys Systemic velocity
43- 44 I2 --- N1 Number of slits in first radial bin
46- 47 I2 arcsec Average radius of first radial bin
49- 50 I2 --- N2 Number of slits in second radial bin
52- 54 I3 arcsec Average radius of second radial bin
56- 57 I2 --- N3 ? Number of slits in third radial bin
59- 61 I3 arcsec ? Average radius of third radial bin
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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- 7 A7 --- Gal Galaxy name
9- 10 I2 h RAh Line of sight Right ascension (J2000)
12- 13 I2 min RAm Line of sight Right ascension (J2000)
15- 20 F6.3 s RAs Line of sight Right ascension (J2000)
22 A1 --- DE- Line of sight Declination sign (J2000)
23- 24 I2 deg DEd Line of sight Declination (J2000)
26- 27 I2 arcmin DEm Line of sight Declination (J2000)
29- 34 F6.3 arcsec DEs Line of sight Declination (J2000)
36- 41 F6.1 km/s Vobs Observed recession velocity
43- 47 F5.1 km/s e_Vobs rms uncertainty on Vobs
49- 54 F6.1 km/s sigma ?=9999.9 Velocity dispersion
56- 60 F5.1 km/s e_sigma ?=999.9 rms uncertainty on sigma
62- 66 F5.2 --- h3 ?=- Gauss-Hermite coefficient h3
68- 71 F4.2 --- e_h3 ?=- rms uncertainty on h3
73- 77 F5.2 --- h4 ?=- Gauss-Hermite coefficient h4
79- 82 F4.2 --- e_h4 ?=- rms uncertainty on h4
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 07-Jun-2010