J/A+A/384/383 Hα galaxies in Abell 1367 and Coma (Iglesias-Paramo+, 2002)
A deep Hα survey of galaxies in the two nearby clusters Abell 1367 and
Coma. The Hα luminosity functions.
Iglesias-Paramo J., Boselli A., Cortese L., Vilchez J.M., Gavazzi G.
<Astron. Astrophys. 384, 383 (2002)>
=2002A&A...384..383I 2002A&A...384..383I
ADC_Keywords: Clusters, galaxy ; Photometry, H-alpha ; Radial velocities
Keywords: atlases - galaxies - ISM: HII regions -
galaxies: clusters: individual: Abell 1367; Coma; Virgo
Abstract:
We present a deep wide field Hα imaging survey of the central
regions of the two nearby clusters of galaxies Coma and Abell 1367,
taken with the WFC at the Prime Focus at the NT 2.5m telescope located
at Observatorio de El Roque de los Muchachos (La Palma), on April 26th
and 28th 2000. We determine for the first time the Schechter
parameters of the Hα luminosity function (LF) of cluster
galaxies.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 89 41 Some properties of the selected Hα
emitting galaxies in Abell 1367
table5.dat 89 22 Some properties of the selected Hα
emitting galaxies in Coma
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See also:
J/A+AS/137/495 : Halpha Catalogue of HCG Galaxies (Severgnini+, 1999)
Byte-by-byte Description of file: table4.dat table5.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- [IBC2002] Designation (HHMMSS+DDMMSS, J2000 position)
15- 22 A8 --- CGCG CGCG (Cat. VII/49) designation
24- 33 A10 --- Name Other name
35- 36 I2 h RAh Right ascension (J2000.0)
38- 39 I2 min RAm Right ascension (J2000.0)
41- 45 F5.2 s RAs Right ascension (J2000.0)
47 A1 --- DE- Declination sign (J2000.0)
48- 49 I2 deg DEd Declination (J2000.0)
51- 52 I2 arcmin DEm Declination (J2000.0)
54- 57 F4.1 arcsec DEs Declination (J2000.0)
59- 62 I4 km/s RV Radial velocity
63- 64 A2 --- n_RV [+ ] Note on RV (1)
66- 70 F5.2 mag r'mag r' Sloan-Gunn broad-band filter (6240Å)
magnitude
72- 77 F6.2 [mW/m2] logFlux Log of the Hα+[N II] flux
79- 82 F4.2 [mW/m2] e_logFlux rms uncertainty on logFlux (2)
84- 86 I3 --- EW Hα+[N II] equivalent width
88- 89 I2 --- e_EW rms uncertainty on EW (3)
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Note (1): Note on radial velocity:
+: Objects with unknown redshift but detected in the net Hα frames
++: Objects for which we have measured the redshift. It will appear in
a subsequent paper (Gavazzi et al. 2002, in prep.).
Note (2): The uncertainty includes three contributions:
the Poisson photon counts error, the uncertainty on the background and
the photometric uncertainty, which is assumed as 10% of the net flux.
These errors were determined separately on the ON and OFF-band frames,
and combined using the standard error propagation.
Note (3): Error, computed similarly to e_logFlux, except that the error
on the absolute flux scale does not affect the equivalent width.
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History:
From electronic version of the journal
(End) James Marcout, Patricia Bauer [CDS] 10-Apr-2002