J/ApJS/199/36 Hα survey of nearby clusters of galaxies (Sakai+, 2012)
A deep, wide-field Hα survey of nearby clusters of galaxies: data.
Sakai S., Kennicutt R.C.Jr, Moss C.
<Astrophys. J. Suppl. Ser., 199, 36 (2012)>
=2012ApJS..199...36S 2012ApJS..199...36S
ADC_Keywords: Clusters, galaxy ; Radial velocities ; Equivalent widths
Keywords: galaxies: clusters: general - galaxies: evolution - galaxies: ISM -
H II regions - stars: formation - surveys
Abstract:
We present the results of a wide-field Hα imaging survey of
eight nearby (z=0.02-0.03) Abell clusters. We have measured Hα
fluxes and equivalent widths for 465 galaxies, of which 360 are new
detections. The survey was designed to obtain complete
emission-line-selected inventories of star-forming galaxies in the
inner regions of these clusters, extending to star formation rates
below 0.1M☉/yr. This paper describes the observations, data
processing, and source identification procedures, and presents an
Hα and R-band catalog of detected cluster members and other
candidates. Future papers in the series will use these data to study
the completeness of spectroscopically based star formation surveys,
and to quantify the effects of cluster environment on the present-day
populations of star-forming galaxies. The data will also provide a
valuable foundation for imaging surveys of redshifted Hα
emission in more distant clusters.
Description:
Our survey required a CCD imager with a wide field of view (∼1°)
and equipped with narrowband filters covering the wavelength range
corresponding to Hα redshifted by 3000-9000km/s. This
requirement was met by the MOSAIC-1 Imager on the Kitt Peak National
Observatory (KPNO) 0.9m telescope. Observations were made over three
observing runs in 1999-2001. The instrument was equipped with a
standard set of Kron-Cousins UBVRI broadband filters along with a set
of five narrowband filters (∼80Å FWHM) with central wavelengths of
6569, 6609, 6650, 6689, and 6730Å (or the wavelength of rest
Hα redshifted by roughly 0, 40, 80, 120, and 160Å). These are
referred to in the instrument documentation as Ha, Ha4, Ha8, Ha12, and
Ha16.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 44 8 Observed clusters of galaxies
table3.dat 26 97 New velocities from spectroscopic observing runs
table4.dat 110 367 Sample data. Galaxies with (S/N)(EW)>3 and
measured velocities.
table5.dat 101 98 Sample data. Galaxies with (S/N)(EW)>3 but no
measured velocities.
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See also:
III/116 : Spectrophotometric Standards (Massey+ 1988)
J/ApJS/178/247 : Hα and [NII] survey in local 11 Mpc (Kennicutt+, 2008)
J/A+A/486/755 : Parameters of galaxies in 8 Abell clusters (Thomas+, 2008)
J/A+A/446/839 : Hα surface photometry in nearby clusters (Gavazzi+,
2006)
J/AJ/130/2571 : KISS Hα-selected survey list 3 (Jangren+, 2005)
J/MNRAS/357/1337 : Hα survey of cluster galaxies (Moss+, 2005)
J/MNRAS/359/930 : CUYS survey of Ha+NII ELG galaxies (Bongiovanni+, 2005)
J/A+A/414/23 : CCD Hα and R photometry of 334 galaxies (James+, 2004)
J/AJ/127/1943 : KISS Hα survey list 2 (Gronwall+, 2004)
J/ApJ/604/141 : Hα fluxes in Cl J0023+0423B galaxies (Finn+, 2004)
J/A+A/384/383 : Hα galaxies in Abell 1367 and Coma (Iglesias-Paramo+,
2002)
J/AJ/121/66 : KISS Hα survey list 1 (Salzer+, 2001)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1 A1 --- --- [A]
2- 5 I4 --- A Abell cluster number
7- 8 I2 h RAh Hour of right ascension (J2000)
10- 11 I2 min RAm Minute of right ascension (J2000)
13- 16 F4.1 s RAs Second of right ascension (J2000)
18 A1 --- DE- Sign of declination (J2000)
19- 20 I2 deg DEd Degree of declination (J2000)
22- 23 I2 arcmin DEm Arcminute of declination (J2000)
25- 26 I2 arcsec DEs Arcsecond of declination (J2000)
28- 31 I4 km/s RVel Radial velocity
33 I1 --- Nobs Number of fields observed
35- 39 F5.3 mag AB Foreground Galactic extinction
41- 44 F4.1 Mpc Dist Distance (1)
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Note (1): For the distance to each cluster, we adopted the value determined by
the Tully-Fisher relation in Sakai et al. (2000ApJ...529..698S 2000ApJ...529..698S) when
available. If not, then H0=72km/s/Mpc was used to estimate the
distance.
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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 A1 --- --- [A]
2- 5 I4 --- A Abell cluster number
7- 9 I3 --- ID Galaxy ID number
11- 15 I5 km/s RVel Radial velocity
17 I1 km/s e_RVel Error on RVel
19- 22 I4 yr Obs.Y Year of observation (2001 or 2003)
24- 26 A3 "month" Obs.M Month of the observation
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Byte-by-byte Description of file: table[45].dat
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Bytes Format Units Label Explanations
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1 A1 --- --- [A]
2- 5 I4 --- A Abell cluster number
7- 9 I3 --- ID Galaxy ID number
11- 34 A24 --- Name Name of the galaxy
36- 37 I2 h RAh Hour of Right Ascension (J2000)
39- 40 I2 min RAm Minute of Right Ascension (J2000)
42- 45 F4.1 s RAs Second of Right Ascension (J2000)
47 A1 --- DE- Sign of declination (J2000)
48- 49 I2 deg DEd Degree of Declination (J2000)
51- 52 I2 arcmin DEm Arcminute of Declination (J2000)
54- 55 I2 arcsec DEs Arcsecond of Declination (J2000)
57- 61 I5 km/s RVel ? Radial Velocity (only for table 4)
63- 69 F7.2 0.1nm EWHa Hα equivalent width; in Angstroms
71- 75 F5.2 0.1nm e_EWHa Error in EWHa; in Angstroms
77- 84 F8.3 [mW/m2] logFHa Logarithmic of Hα flux
86- 89 F4.2 Msun/yr SFR Star formation rates
91- 95 F5.3 --- [NII]/Ha Ratio of [NII] to Hα lines
97-101 F5.1 kpc RadHa Hα radius
103-110 A8 --- MType Morphological type (only for table 4)
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 25-Jun-2012