J/AJ/121/182 Photometry of Clusters in IC2163 and NGC2207 (Elmegreen+, 2001)
Hubble space telescope observations of dust and star-forming regions in the
ocular galaxy IC 2163 and its spiral companion NGC 2207.
Elmegreen D.M., Kaufman M., Elmegreen B.G., Brinks E., Struck C.,
Klaric M., Thomasson M.
<Astron. J., 121, 182-197 (2001)>
=2001AJ....121..182E 2001AJ....121..182E (SIMBAD/NED BibCode)
ADC_Keywords: Interstellar medium ; Extinction ; Galaxies, optical
Mission_Name: HST
Keywords: ISM: Dust, Extinction, Galaxies: Individual: Alphanumeric: IC 2163,
Galaxies: Individual: NGC Number: NGC 2207, Galaxies: Interactions,
Galaxies: Star Clusters
Abstract:
Hubble Space Telescope observations in U, B, V, and I passbands of the
interacting spiral galaxies IC2163 and NGC2207 are used to measure
extinctions in the cloud and intercloud regions and ages and
luminosities of the star-forming regions. The extinction in the part
of NGC2207 seen in projection against IC2163 was determined by using
the method of White & Keel (1992Natur.359..129W 1992Natur.359..129W). The extinctions
there and elsewhere were also determined from radiative transfer
models of the magnitude differences between clouds and their
surroundings. The intercloud extinction in V band ranges from 0.5 to
1mag on the line of sight, and the cloud extinction ranges from 1 to
2mag. The measured star-forming regions in these galaxies have a
power-law relation between size and luminosity and a power-law
luminosity distribution function. These power laws are consistent with
a fractal dimension for the star formation that is the same as that
for interstellar gas, D∼2.2, extending over scales ranging from 20 to
1000pc. Fifteen compact massive star clusters that are analogous to
super-star clusters found in starburst regions are in the spiral arms
of NGC2207. Nothing is peculiar about these regions except for a high
H I velocity dispersion (∼50km.s-1). Two more super-star clusters are
in the tidally compressed oval of IC2163. These clusters have masses
ranging from ∼104 to 2x105 Msolar and ages of a few times 106
yr.
Objects:
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RA (2000) DE Designation(s)
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06 16 27.7 -21 22 31 IC 2163
06 16 22.1 -21 22 20 NGC 2207
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 28 17 UVBI for Super star clusters
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Num Super star cluster number
4- 8 F5.1 mag VMag Absolute V band magnitude
10- 13 F4.1 mag U-B The (U-B) color
15- 18 F4.1 mag B-V The (B-V) color
20- 23 F4.1 mag V-I The (V-I) color
25- 28 F4.1 10-4.solMass Mass Cluster mass
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Laurent Cambresy [CDS] 23-Jul-2004