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J/AJ/138/873   Galaxies with Hα emission in A2151         (Cedres+, 2009)

Star-forming galaxies in the Hercules cluster: Hα imaging of A2151. Cedres B., Iglesias-Paramo J., Vilchez J.M., Reverte D., Petropoulou V., Hernandez-Fernandez J. <Astron. J., 138, 873-888 (2009)> =2009AJ....138..873C
ADC_Keywords: Clusters, galaxy ; Spectroscopy ; Equivalent widths Keywords: galaxies: clusters: general Abstract: This paper presents the first results of an Hα imaging survey of galaxies in the central regions of the A2151 cluster. A total of 50 sources were detected in Hα, from which 41 were classified as secure members of the cluster and 2 as likely members based on spectroscopic and photometric redshift considerations. The remaining seven galaxies were classified as background contaminants and thus excluded from our study on the Hα properties of the cluster. Description: The data were obtained during two observational runs. The first one was from 2003 May 6 to 7 at the 256cm Nordic Optical Telescope (NOT) located at the Roque de los Muchachos Observatory. The second run was during 2003 June 4 and 5 at the 420cm William Herschel Telescope (WHT), located also at the Roque de los Muchachos Observatory. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 93 50 Detected galaxies with emission in our survey
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 2 I2 --- Seq [1/50] Identification number 4- 28 A25 --- Name Galaxy name 30- 31 I2 h RAh Right ascension (J2000) 33- 34 I2 min RAm Right ascension (J2000) 36- 39 F4.1 s RAs Right ascension (J2000) 41 A1 --- DE- Declination sign (J2000) 42- 43 I2 deg DEd Declination (J2000) 45- 46 I2 arcmin DEm Declination (J2000) 48- 51 F4.1 arcsec DEs Declination (J2000) 53- 58 F6.2 aW/m2 Flux Hα+[NII] flux (uncorrected for Galactic extinction) 60- 64 F5.2 aW/m2 e_Flux rms uncertainty on Flux 66- 68 I3 0.1nm EW Hα+[NII] equivalent width 70- 71 I2 0.1nm e_EW rms uncertainty on EW 73- 77 I5 km/s RV ?=- Radial (spectroscopic) velocity from NED 79- 84 F6.2 mag BMAG Absolute B magnitude (1) 86 I1 --- Mm [0/3] Cluster membership (0-1=secure) (2) 88 A1 --- AGN [Y] Flag for AGN candidates 90- 93 A4 --- Type Hubble type of the galaxies obtained from the LEDA database (3)
Note (1): from the SDSS g" magnitudes, assuming a distance to A2151 of 158.3Mpc and an average correction of g"-B~-0.3mag (Fukugita et al., 1995PASP..107..945F) Note (2): Membership flag as follows: 0 = secure members for galaxies with spectroscopic radial velocity 1 = secure members from the photo-z criterion 2 = likely members from the photo-z criterion 3 = background galaxies Note (3): Galaxies with no available Hubble type are classified as "Comp" (compact).
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 16-Jan-2012
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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