J/A+A/357/437 Photometry of young star groupings in spirals (Battinelli+, 2000)
Large scale star formation in galaxies.
I. The spirals NGC 7217, NGC 1058 and UGC 12732. Young star groupings in spirals
Battinelli P., Capuzzo-Dolcetta R., Hodge P.W., Vicari A., Wyder T.K.
<Astron. Astrophys. 357, 437 (2000)>
=2000A&A...357..437B 2000A&A...357..437B (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, photometry ; Populations, stellar ; YSOs
Keywords: galaxies: individual: NGC 7217 - galaxies: individual: NGC 1058 -
galaxies: individual: UGC 12732 - galaxies: stellar content -
stars: formation - methods: statistical
Abstract:
We present multiband photometric observations of three spiral galaxies
selected in a sample suited for the study of young stellar groupings
and their relationship with the parent galaxy and the galactic
environment. Star forming regions have been identified using an
objective technique based on a multivariate statistical analysis. Maps
of young star groupings are given for each galaxy. The luminosity
functions of the young star group populations show a remarkable
similarity with a slope in the range -1.52 to -1.33. The size
distributions peak around the classical 100pc value of the Local Group
associations for two out of the three galaxies. NGC 1058 shows smaller
associations (peak at ∼50pc). The total number of young groups per
unit B absolute luminosity of the galaxy is significantly greater in
UGC 12732. The activity of star formation is in all three galaxies
clearly stronger in the central regions.
Objects:
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RA (2000) DE Designation(s)
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22 07 52.5 +31 21 32 NGC 7217 = UGC 11914
02 43 30.0 +37 20 27 NGC 1058 = UGC 2193
23 40 39.9 +26 14 08 UGC 12732
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 35 149 Young star groupings in NGC 7217
table2.dat 35 35 Young star groupings in NGC 1058
table3.dat 35 108 Young star groupings in UGC 12732
tables.tex 137 211 LaTeX version of the tables
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See also:
J/AJ/116/1626 : Spiral & lenticular galaxy brightness profiles (Baggett+, 1998
J/A+A/309/749 : Fundamental plane of early type galaxies (Prugniel+ 1996)
Byte-by-byte Description of file: table?.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq Identification number
5- 8 I4 arcsec X Offset from the galactic centre (1)
10- 13 I4 arcsec Y Offset from the galactic centre (1)
15- 19 F5.2 kpc Dist Distance to the centre
21- 25 F5.2 mag Bmag ? Integrated B magnitude (2)
27- 31 F5.2 mag/arcsec+2 SuBr ? B-surface brightness (2)
33- 35 I3 pc D Size
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Note (1): North up and East to the left.
Note (2): When no values, data not available (see text).
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Acknowledgements: Paolo Battinelli
(End) Patricia Bauer [CDS] 25-May-2000