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J/ApJS/124/127 Near IR Imaging of Early-Type Galaxies (Pahre, 1999)
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Near-infrared Imaging of Early-Type Galaxies. II. Global Photometric Parameters.
Pahre M. A.
<Astrophys. J. Suppl. Ser. 124, 127 (1999)>
=1999ApJS..124..127P (SIMBAD/NED BibCode)
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ADC_Keywords: Galaxies, IR ; Galaxy catalogs ; Photometry, infrared ;
Photometry, surface
Keywords: galaxies: elliptical and lenticular, cD -
galaxies: fundamental parameters - galaxies: photometry -
galaxies: stellar content - infrared: galaxies
Abstract:
An imaging survey of 341 nearby early-type galaxies in the
near-infrared K-band atmospheric window (2.2{micron}) is described.
The galaxies primarily reside in 13 nearby rich clusters (85%), while
some additional galaxies are drawn from loose groups (12%) and the
general field (3%). Surface photometry was measured for the entire
sample. Detailed corrections were derived from an extensive grid of
seeing-convolved r^1/4^ models and then applied to the isophotal
surface brightness, aperture magnitude, and ellipticity profiles.
Global photometric parameters were derived from this seeing-corrected
photometry. More than 25% of the sample has been observed at least
twice, and these repeat measurements demonstrate the small internal
uncertainties on the derived global photometric parameters. Extensive
comparisons with aperture photometry from the literature demonstrate
that the photometric system is fully consistent with other photometric
systems to <=0.01mag and confirm the estimates of internal random
uncertainties. Additional global parameters are drawn from the
literature in a homogeneous manner in order to construct a large
catalog of galaxy properties: 95% of the galaxies have a velocity
dispersion, 69% have a Mg_2_ index, 80% have an optical r_eff_ and
{mu}_eff_, 82% have a D_n_, and 81% have a derived optical - infrared
color measurement. This large data set provides excellent source
material for investigations of the physical origins of the global
scaling relations of early-type galaxies, velocity fields in the local
universe, and comparisons to higher redshift early-type galaxies.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 100 454 Global K-band photometric measurements
tablea2.dat 100 341 Catalog of parameters for program galaxies
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Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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2- 20 A19 --- Name Galaxy name (1)
23- 32 A10 --- Group Cluster group
34- 39 A6 --- Tel Telescope
41- 46 F6.3 [arcsec] Radeff Log effective radius
48- 53 F6.3 mag/arcsec2 SBeff Mean effective surface brightness
55- 60 F6.3 mag Keff Total circular aperture K magnitude
62- 66 F5.3 [arcsec] Kdia Log diameter (2)
68- 73 F6.3 mag K20 K magnitude within a 20" diameter
circular aperture
75- 80 F6.3 [arcsec] Radell Log effective radius (3)
82- 86 F5.3 --- Epsilon Ellipticity of the isophote ellipse
88- 93 F6.3 mag/arcsec2 SBell Mean elliptical isophote surface
brightness
95-100 F6.3 mag Kell Total elliptical isophote K magnitude
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Note (1): Galaxy names are given in a format suitable for searching in the
NASA Extragalactic Database (NED) an Simbad Database. For example,
the first galaxy in the table can be found using the search term
"Abell 0194:[D80] 022". In some cases, the Abell catalog
identification will have to be substituted for the common name of the
clustere.g., "Abell 1656" for "Coma"in identifying these galaxies in
NED; these alternative cluster names are cross-referenced in Table 1.
The references for the galaxy names appearing in brackets are
[D80]: Dressler 1984ApJ...281..512D
[DCL86]: Dickens, Currie, & Lucey 1986MNRAS.220..679D
[F89]: Faber et al. 1989ApJS...69..763F
[LGC91]: Lucey et al. 1991MNRAS.248..804L
[S96a]: Stein 1996A&AS..116..203S
[SLH97]: Smith et al. 1997MNRAS.291..461S
The PGC and [S96a] references for the Hydra Cluster are
cross-referenced to the list of Smyth 1980 (thesis) ("S").
The [F89] identifications for companion galaxies (i.e., "NCOM,"
"FCOM," etc.), refer directly back to that paper instead of NED.
Note (2): The circular aperture diameter at which the mean integrated surface
brightness-fully corrected for cosmological effects and Galactic
extinction-drops to 16.6mag/arcsec^2^.
Note (3): Effective radius of elliptical isophote. Equal to the
semimajor axis * (1 - ellipticity)^1/2^
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Byte-by-byte Description of file: tablea2.dat
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Bytes Format Units Label Explanations
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1- 20 A20 --- Name Galaxy name (as in tablea1.dat)
22- 31 A10 --- Group Cluster group membership
33- 38 A6 --- Type Galaxy type
39- 44 F6.3 [arcsec] KReff K band Log effective radius
46- 50 F5.2 mag/arcsec2 KSBeff Mean K band effective surface brightness
52- 56 F5.2 mag Ktot Total circular aperture K magnitude
58- 62 F5.3 [arcsec] Kdia Log diameter in the K band (1)
64- 69 F6.3 [arcsec] VReff ? V band Log effective radius
71- 75 F5.2 mag/arcsec2 VSBeff ? Mean V band effective surface brightness
77- 81 F5.3 [arcsec] Vdia ? Log diameter (2)
83- 86 F4.2 mag V-K ? V minus K color
87 A1 --- n_V-K [:] ":" color not calculated using matched
aperture magnitudes
89- 93 F5.3 km/s sigma ? Velocity dispersion
95- 99 F5.3 mag Mg2 ? Mg II index
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Note (1): The circular aperture diameter at which the mean integrated surface
brightness-fully corrected for cosmological effects and Galactic
extinction-drops to 16.6mag/arcsec^2^.
Note (2): Defined in Lucey & Carter, 1988MNRAS.235.1177L.
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History:
From ApJ electronic edition
References: Pahre+ 1988PASP..110..1249P and Pahre+ 1998AJ..116..1591P
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(End) Greg Schwarz (AAS) 28-Jan-2000