J/AJ/127/105 Nuclear star clusters in late-type spiral galaxies (Boker+, 2004)
A Hubble Space Telescope census of nuclear star clusters in late-type spiral
galaxies. II. Cluster sizes and structural parameter correlations.
Boker T., Sarzi M., Mclaughlin D.E., Van Der Marel R.P., Rix H.-W.,
Ho L.C., Shields J.C.
<Astron. J., 127, 105-118 (2004)>
=2004AJ....127..105B 2004AJ....127..105B
ADC_Keywords: Associations, stellar ; Magnitudes
Keywords: galaxies: nuclei - galaxies: spiral - galaxies: star clusters
Abstract:
We investigate the structural properties of nuclear star clusters in
late-type spiral galaxies. More specifically, we fit analytical models
to Hubble Space Telescope images of 39 nuclear clusters in order to
determine their effective radii after correction for the instrumental
point-spread function. We use the results of this analysis to compare
the luminosities and sizes of nuclear star clusters to those of other
ellipsoidal stellar systems, in particular the Milky Way globular
clusters.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 68 59 Summary of Cluster Properties
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Galaxy name
11- 14 F4.1 Mpc Dist Distance from Paper I (2002AJ....123.1389B 2002AJ....123.1389B),
assuming Ho=70km/s/Mpc
16- 20 F5.2 mag/arcsec2 SB Observed peak disk surface brightness (1)
22- 26 F5.2 mag Imag Nuclear cluster apparent I-band magnitude
28- 33 F6.2 mag IMAG Nuclear cluster absolute I-band magnitude (2)
35- 42 A8 --- BMod Name of best-fitting ISHAPE model (3)
44 A1 --- f_BMod Flag on BMod (4)
46- 50 F5.3 arcsec ARad ? Angular effective radius as discussed
in section 2
52- 56 F5.3 arcsec e_ARad ? Uncertainty in ARad
58- 62 F5.2 pc Rad ? Physical effective radius
64- 67 F4.2 [solLum/pc2] logI ? Logarithm of the nuclear cluster effective
I-band intensity (5)
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Note (1): Not inclination-corrected.
Note (2): Corrected for foreground reddening.
Note (3): ngf = No good fit was possible.
Note (4): Flag on BMod:
1 = Low signal-to-noise data;
2 = Complex morphology.
Note (5): Defined as logI = 0.4(4.08-IMAG) - log(2π*Rad2).
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History:
From electronic version of the journal
References:
Boker et al., Paper I 2002AJ....123.1389B 2002AJ....123.1389B
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 13-Feb-2004