J/A+AS/102/251 Objective-prism survey of em. objects in M31 (Meyssonnier+ 1993)
An objective-prism survey of emission-line objects in M 31.
Meyssonnier N., Lequeux J., Azzopardi M.
<Astron. Astrophys. Suppl. Ser. 102, 251 (1993)>
=1993A&AS..102..251M 1993A&AS..102..251M
ADC_Keywords: Surveys; Galaxies, nearby; Nebulae; Planetary nebulae
Keywords: galaxies,individual: M 31 - HII regions - planetary nebulae -
Wolf-Rayet stars - galaxies: stellar content - surveys
Abstract:
Using GRENS plates taken at the Canada-France-Hawaii telescope, we
have searched almost the whole extent of M31 for small-diameter
objects with strong emission lines. Most are planetary nebulae
candidates, but there are also many Wolf-Rayet star candidates and
small HII regions or compact parts of large HII regions. A catalogue
is presented with a cross-identification with previous catalogues.
Many new planetary nebulae and Wolf-Rayet candidates are found. Their
distribution is compared with those of other tracers in M31. In
particular the distribution of planetary nebulae candidates is
compared with that of the integrated blue light and we confirm the
result obtained by Jacoby ( 1980ApJS...42....1J 1980ApJS...42....1J) and Ciardullo et al.
(1989ApJ...339...53C 1989ApJ...339...53C): the number of planetary nebulae per unit total
luminosity is a constant throughout the disk of M31. The Wolf- Rayet
star candidates are concentrated in the well-known ring of star
formation; their total number is estimated as 300 within the limit of
detection of the deepest existing surveys, but this may still be an
underestimate of the true number.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 62 1312 catalogue of 1312 emission-line objects in M31
table4.dat 62 203 doubtful candidates emission-line objects
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Byte-by-byte Description of file: table3.dat table4.dat
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Bytes Format Units Label Explanations
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2- 5 I4 --- Seq Running number
6- 7 A2 --- u_Seq [: ] existence flag, as:
blank sure
: doubtful
:: very doubtful
9- 10 I2 h RAh Right Ascension 1950 (hours)
12- 13 I2 min RAm Right Ascension 1950 (minutes)
15- 18 F4.1 s RAs Right Ascension 1950 (seconds)
20 A1 --- DE- Declination 1950 (sign)
21- 22 I2 deg DEd Declination 1950 (degrees)
24- 25 I2 arcmin DEm Declination 1950 (minutes)
27- 28 I2 arcsec DEs Declination 1950 (seconds)
31 I1 --- Npos number of position measurements
32 A1 --- u_Npos Uncertainty flag on Npos, as
blank coherent measurements
: one measurement doubtful or impossible
34- 53 A20 --- Names other identifications (1)
55- 74 A20 --- Nature possible nature of the objects
(if followed by "?", doubtful nature) (2)
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Note (1): the following acronyms are used:
BA = Baade W., Arp H.: 1964ApJ...139.1027B 1964ApJ...139.1027B
D = Crampton D., Cowley A.P., Schade D., Chayer P.: 1985ApJ...288..494C 1985ApJ...288..494C
DDB = d'Odorico S., Dopita M.A., Benvenuti P.: 1980A&AS...40...67D 1980A&AS...40...67D
F = Ford H.C., Jenner D.C.: 1975ApJ...202..365F 1975ApJ...202..365F
Ford H.C., Jacoby G.H.: 1978ApJS...38..351F 1978ApJS...38..351F
Lawrie D.G., Ford H.C.: 1982ApJ...256..120L 1982ApJ...256..120L
Nolthenius R., Ford H.C.: 1987ApJ...317...62N 1987ApJ...317...62N
Ciardullo R., Jacoby G.H., Ford H.C., Neill J.D.: 1989ApJ...339...53C 1989ApJ...339...53C
H = Crampton D., Cowley A.P., Schade D., Chayer P.: 1985ApJ...288..494C 1985ApJ...288..494C
IT = Moffat A.F.J., Shara M.M.: 1987ApJ...320..266M 1987ApJ...320..266M
MS = Moffat A.F.J., Shara M.M.: 1983ApJ...273..544M 1983ApJ...273..544M
OB = Massey P., Armandroff T.E., Conti P.S.: 1986AJ.....92.1303M 1986AJ.....92.1303M
WB = Walterbos R.A.M., Braun R.: 1992A&AS...92..625W 1992A&AS...92..625W
Note (2): the abbreviations for the nature are:
*M: M star
CL: globular cluster
GAL: galaxy
HII: compact HII region
L+C: line + continuum
QSO: quasi stellar object
SNR: supernova remnant
WR: Wolf-Rayet star
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History:
* 31-Jul-2001: added bibcodes
(End) [CDS] 07-Jun-1993