J/MNRAS/422/885 Ultracompact dwarf galaxies in Perseus (Penny+, 2012)
Hubble Space Telescope survey of the Perseus cluster.
IV. Compact stellar systems in the Perseus cluster core and ultracompact dwarf
formation in star-forming filaments.
Penny S.J., Forbes D.A., Conselice C.J.
<Mon. Not. R. Astron. Soc., 422, 885-901 (2012)>
=2012MNRAS.422..885P 2012MNRAS.422..885P
ADC_Keywords: Galaxies, nearby ; Stars, dwarfs ; Photometry, HST
Keywords: galaxies: clusters: general -
galaxies: clusters: individual: Perseus cluster - galaxies: dwarf -
galaxies: star clusters: general
Abstract:
We present the results of the first search for ultracompact dwarfs
(UCDs) in the Perseus cluster core, including the region of the
cluster around the unusual brightest cluster galaxy NGC 1275.
Utilizing Hubble Space Telescope Advanced Camera for Surveys imaging,
we identify a sample of 84 UCD candidates with half-light radii
10<re<57pc out to a distance of 250kpc from the cluster centre,
covering a total survey area of ∼70arcmin2.
Description:
We have obtained HST ACS WFC imaging in the F555W and F814W bands for
five fields in the core of the Perseus cluster. The exposure times
were one orbit (∼2200s) per band per field.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 61 40 UCDs in the vicinity of NGC 1275 identified
from F435W and F625W imaging
table3.dat 61 44 UCDs identified from our F555W and F814W band
imaging covering five fields of the Perseus core
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See also:
J/A+AS/139/141 : Galaxies in the Perseus Cluster (Brunzendorf+, 1999)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [UCD]
4- 5 I2 --- UCD [1/40] Ultracompact dwarf (UCD) sequential
number, <[PFC2012] UCDNN> in Simbad
8- 9 I2 h RAh Right ascension (J2000)
11- 12 I2 min RAm Right ascension (J2000)
14- 18 F5.2 s RAs Right ascension (J2000)
20 A1 --- DE- Declination sign (J2000)
21- 22 I2 deg DEd Declination (J2000)
24- 25 I2 arcmin DEm Declination (J2000)
27- 30 F4.1 arcsec DEs Declination (J2000)
32- 36 F5.2 mag Rmag R magnitude (F625W)
38- 41 F4.2 mag e_Rmag rms uncertainty on Rmag
43- 46 F4.2 mag (B-R)0 Deredenned B-R colour index
48- 51 F4.2 mag e_(B-R)0 rms uncertainty on (B-R)0
53- 56 F4.1 pc re Effective radius, from F625W band
58- 61 F4.2 --- b/a [0/1] Axis ratio
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- --- [UCD]
4- 5 I2 --- UCD [41/84] Ultracompact dwarf (UCD) sequential
number, <[PFC2012] UCDNN> in Simbad
8- 9 I2 h RAh Right ascension (J2000)
11- 12 I2 min RAm Right ascension (J2000)
14- 18 F5.2 s RAs Right ascension (J2000)
20 A1 --- DE- Declination sign (J2000)
21- 22 I2 deg DEd Declination (J2000)
24- 25 I2 arcmin DEm Declination (J2000)
27- 30 F4.1 arcsec DEs Declination (J2000)
32- 36 F5.2 mag Imag I magnitude (F814W)
38- 41 F4.2 mag e_Imag rms uncertainty on Imag
43- 46 F4.2 mag (V-I)0 Deredenned V-I colour index
48- 51 F4.2 mag e_(V-I)0 rms uncertainty on (V-I)0
53- 56 F4.1 pc re Effective radius, from F814W band
58- 61 F4.2 --- b/a [0/1] Axis ratio
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History:
From electronic version of the journal
References:
Penny et al., Paper I 2009MNRAS.393.1054P 2009MNRAS.393.1054P
de Rijcke et al., Paper II 2009MNRAS.393..798D 2009MNRAS.393..798D
Penny et al., Paper III 2011MNRAS.410.1076P 2011MNRAS.410.1076P
(End) Patricia Vannier [CDS] 08-Dec-2012