J/MNRAS/465/2820 NGC 6951 & NGC 1512 clusters HST photometry (de Grijs+, 2017)
Young star clusters in circumnuclear starburst rings.
de Grijs R., Ma C., Jia S., Ho L.C., Anders P.
<Mon. Not. R. Astron. Soc., 465, 2820-2832 (2017)>
=2017MNRAS.465.2820D 2017MNRAS.465.2820D (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, nearby ; Clusters, open ; Photometry, HST
Keywords: globular clusters: general - galaxies: evolution -
galaxies: individual: NGC 1512 - galaxies: individual: NGC 6951 -
galaxies: star clusters: general - galaxies: star formation
Abstract:
We analyse the cluster luminosity functions (CLFs) of the youngest
star clusters in two galaxies exhibiting prominent circumnuclear
starburst rings. We focus specifically on NGC 1512 and NGC 6951, for
which we have access to Hα data that allow us to unambiguously
identify the youngest sample clusters. To place our results on a firm
statistical footing, we first explore in detail a number of important
technical issues affecting the process from converting the
observational data into the spectral energy distributions of the
objects in our final catalogues. The CLFs of the young clusters in
both galaxies exhibit approximate power-law behaviour down to the 90
per cent observational completeness limits, thus showing that star
cluster formation in the violent environments of starburst rings
appears to proceed similarly as that elsewhere in the local Universe.
We discuss this result in the context of the density of the
interstellar medium in our starburst-ring galaxies.
Description:
Our perusal of the HST Data Archive showed that NGC 6951 has been
observed by a number of investigators using a range of cameras.
We obtained the broad-band SEDs for all 104 clusters identified
in the NGC 6951 central galaxy field.
We also selected pre-processed, high-resolution images of NGC 1512
from the HLA.
We obtained photometric measurements for the 275 sample clusters with
good-quality measurements.
Objects:
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RA (2000) DE Designation(s)
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20 37 14.12 +66 06 20.1 NGC 6951 = LEDA 65086
04 03 54.28 -43 20 55.9 NGC 1512 = LEDA 14391
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 98 104 Aperture-corrected medium- and broad-band
photometry of the 104 NGC 6951 cluster candidates
using fixed apertures
table3.dat 81 104 Variable-aperture medium- and broad-band
photometry of the 104 NGC 6951 cluster candidates
table4.dat 105 275 Photometry of the 275 NGC 1512 cluster
candidates with good-quality measurements
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See also:
J/AJ/121/3048 : Multicolor photometry in NGC 1512 and NGC 5248 (Maoz+, 2001)
J/A+A/566/A115 : XMM sources in NGC1512/1510 (Ducci+, 2014)
J/A+A/551/A81 : NGC 6951 intensity and velocity maps (van der Laan+, 2013)
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 -- ID ID number (this paper)
5- 10 F6.2 arcsec oRA Delta Right Ascension (1)
12- 17 F6.2 arcsec oDE Delta Declination (1)
19- 24 F6.3 mag Umag ?=99.999 Integrated apparent F330W magnitude
26- 30 F5.3 mag e_Umag ?=9.999 Uncertainty in the F330W magnitude
32- 37 F6.3 mag Vmag ?=99.999 Integrated apparent F547M magnitude
39- 43 F5.3 mag e_Vmag ?=9.999 Uncertainty in the F547M magnitude
45- 50 F6.3 mag Rmag ?=99.999 Integrated apparent F606W magnitude
52- 56 F5.3 mag e_Rmag ?=9.999 Uncertainty in the F606W magnitude
58- 63 F6.3 mag Imag ?=99.999 Integrated apparent F814W magnitude
65- 69 F5.3 mag e_Imag ?=9.999 Uncertainty in the F814W magnitude
71- 76 F6.3 mag Jmag ?=99.999 Integrated apparent F110W magnitude
78- 82 F5.3 mag e_Jmag ?=9.999 Uncertainty in the F110W magnitude
84- 89 F6.3 mag Hmag ?=99.999 Integrated apparent F160W magnitude
91- 95 F5.3 mag e_Hmag ?=9.999 Uncertainty in the F160W magnitude
97- 98 I2 -- [VSE2013] ? ID number from van der Laan et al.,
2013A&A...551A..81V 2013A&A...551A..81V, Cat. J/A+A/551/A81
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Note (1): Offsets form NGC 6951 galaxy center,
RA=20:37:14.13, DE=66:06:20.2 (J2000).
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Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 -- ID ID number (this paper), as in table2
5- 10 F6.3 mag Umag ?=99.999 Integrated apparent F330W magnitude
12- 16 F5.3 mag e_Umag ?=9.999 Uncertainty in the F330W magnitude
18- 23 F6.3 mag Vmag ?=99.999 Integrated apparent F547M magnitude
25- 29 F5.3 mag e_Vmag ?=9.999 Uncertainty in the F547M magnitude
31- 36 F6.3 mag Rmag ?=99.999 Integrated apparent F606W magnitude
38- 42 F5.3 mag e_Rmag ?=9.999 Uncertainty in the F606W magnitude
44- 49 F6.3 mag Imag ?=99.999 Integrated apparent F814W magnitude
51- 55 F5.3 mag e_Imag ?=9.999 Uncertainty in the F814W magnitude
57- 62 F6.3 mag Jmag ?=99.999 Integrated apparent F110W magnitude
64- 68 F5.3 mag e_Jmag ?=9.999 Uncertainty in the F110W magnitude
70- 75 F6.3 mag Hmag ?=99.999 Integrated apparent F160W magnitude
77- 81 F5.3 mag e_Hmag ?=9.999 Uncertainty in the F160W magnitude
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 -- ID ID number
5- 14 F10.7 deg RAdeg Right ascension in decimal degrees (J2000)
16- 17 I2 h RAh Right ascension (J2000)
19- 20 I2 min RAm Right ascension (J2000)
22- 28 F7.4 s RAs Right ascension (J2000)
30- 40 F11.7 deg DEdeg Declination in decimal degrees (J2000)
41 A1 --- DE- Declination sign (J2000)
42- 43 I2 deg DEd Declination (J2000)
45- 46 I2 arcmin DEm Declination (J2000)
48- 54 F7.4 arcsec DEs Declination (J2000)
55- 60 F6.3 mag Umag ?=99.999 Integrated apparent F336W magnitude
62- 66 F5.3 mag e_Umag ?=9.999 Uncertainty in the F336W magnitude
68- 73 F6.3 mag Bmag Integrated apparent F438W magnitude
75- 79 F5.3 mag e_Bmag Uncertainty in the F438W magnitude
81- 86 F6.3 mag Vmag Integrated apparent F555W magnitude
88- 92 F5.3 mag e_Vmag Uncertainty in the F555W magnitude
94- 99 F6.3 mag Imag ?=99.999 Integrated apparent F814W magnitude
101-105 F5.3 mag e_Imag ?=9.999 Uncertainty in the F814W magnitude
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 21-Nov-2018