J/AJ/133/715 Dwarf galaxies of the Local Group (Whiting+, 2007)
An observational limit on the dwarf galaxy population of the Local Group.
Whiting A.B., Hau G.K.T., Irwin M., Verdugo M.
<Astron. J., 133, 715-733 (2007)>
=2007AJ....133..715W 2007AJ....133..715W
ADC_Keywords: Surveys ; Galaxies, nearby ; Galaxies, photometry
Keywords: galaxies: dwarf - Local Group - surveys
Abstract:
We present the results of an all-sky, deep optical survey for faint
Local Group dwarf galaxies. Candidate objects were selected from the
second Palomar Observatory Sky Survey and ESO/Science Research Council
survey plates, and follow-up observations were performed to determine
whether they were indeed overlooked members of the Local Group. Only
two galaxies (Antlia and Cetus) were discovered this way out of 206
candidates. Based on internal and external comparisons, we estimate
that our visual survey is more than 77% complete for objects larger
than 1' in size and with a surface brightness greater than an
extremely faint limit over the 72% of the sky not obstructed by the
Milky Way.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 88 127 Northern Sky Local Group dwarf galaxy candidates
table2.dat 83 67 Southern Sky Local Group dwarf galaxy candidates
table3.dat 88 92 Northern Sky Local Group dwarf non-candidates
table4.dat 88 40 Southern Sky Local Group dwarf non-candidates
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See also:
J/AJ/133/2393 : UBVRI phot. in 7 Local Group dwarfs galaxies (Massey+, 2007)
J/PAZh/33/577 : New dwarf galaxies in northern groups (Karachentsev+, 2007)
Byte-by-byte Description of file: table[12].dat
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Bytes Format Units Label Explanations
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1 A1 ---- n_Name [*] * for Object names not included in
our previous paper
2- 19 A18 --- Name Source name (1)
21- 22 I2 h RAh Hour of Right Ascension (J2000) (2)
24- 25 I2 min RAm Minute of Right Ascension (J2000) (2)
27- 31 F5.2 s RAs Second of Right Ascension (J2000) (2)
33 A1 --- DE- Sign of the Declination (J2000)(2)
34- 35 I2 deg DEd Degree of Declination (J2000) (2)
37- 38 I2 arcmin DEm Arcminute of Declination (J2000) (2)
40- 43 F4.1 arcsec DEs Arcsecond of Declination (J2000) (2)
45- 49 F5.2 mag/arcsec+2 SB ? The R band surface brightness (2)
51- 54 F4.2 mag/arcsec+2 e_SB ? Uncertainty in SB
56- 75 A20 --- Type Source type (3)
77- 88 A12 arcmin Size Angular size (2)
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Note (1): Observational data on Local Group dwarf galaxy candidates in the
northern (table1) or southern (table2) sky. The list was produced
through visual examination of POSS-II (table1) or SRC/ESO (table2)
survey plates.
Note (2): Measurements were obtained during follow-up observations with the
Kitt Peak 2.1m (table1) or CTIO 1.5m and INT 2.5m (table2) telescopes.
Note (3): The identification as Galactic nebulosity, etc., is based on the
morphology of the follow-up image, supplemented by other information
as available.
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Byte-by-byte Description of file: table[34].dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- Name Source name (1)
20- 21 I2 h RAh Hour of Right Ascension (J2000)
23- 24 I2 min RAm Minute of Right Ascension (J2000)
26- 29 F4.1 s RAs Second of Right Ascension (J2000)
31 A1 --- DE- Sign of the Declination (J2000)
32- 33 I2 deg DEd Degree of Declination (J2000)
35- 36 I2 arcmin DEm Arcminute of Declination (J2000)
38- 39 I2 arcsec DEs Arcsecond of Declination (J2000)
41- 52 A12 --- Type Source type
54- 83 A30 --- AName Alternate source name(s)
85- 88 I4 km/s HRV ? NED-derived heliocentric radial velocity
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Note (1): Objects selected as possible Local Group dwarf galaxies based
on their morphology on POSS-II (table3) or ESO/SRC (table4) survey
plates, but rejected for various reasons.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 12-Dec-2008