J/A+A/590/A72 Herschel counterparts of SDC (Peretto+, 2016)
The initial conditions for stellar protocluster formation.
III. The Herschel counterparts of the Spitzer Dark Cloud catalogue.
Peretto N., Lenfestey C., Fuller G.A., Traficante A., Molinari S.,
Thompson M.A., Ward-Thompson D.
<Astron. Astrophys. 590, A72 (2016)>
=2016A&A...590A..72P 2016A&A...590A..72P (SIMBAD/NED BibCode)
ADC_Keywords: Infrared sources ; Molecular clouds
Keywords: catalogs - star:formation - ISM: clouds - dust, extinction
Abstract:
The goal of this paper is to identify which of the clouds from the
Spitzer Dark Cloud catalogue (Peretto & Fuller, 2009, Cat.
J/A+A/505/405) are real, which are artefacts. For this we used
Herschel Hi-GAL (Molinari et al., 2010PASP..122..314M 2010PASP..122..314M) column density
maps and search for spatial associations between Spitzer Dark Cloud
and Herschel column density peaks.
Description: This table provides some of the key properties of the
Spitzer Dark Clouds that we estimated using the Herschel data and used
to disentangle between real and spurious clouds. For each cloud of the
Peretto & Fuller (2009, Cat. J/A+A/505/405) catalogue we give the
cloud name, the cloud equivalent radius, the average Herschel column
density within the boundaries of the SDCs, the average Herschel column
density immediately outside the boundary of the SDCs, the Herschel
column density noise at the position of the SDC, the Herschel column
density peak within the boundaries of the SDCs, the value for
criterion c1, the value for criterion c2, the value for criterion c3,
and a tag that indicates if the cloud has been identified as real by
our automated detection scheme based on the values of c1 and c2. This
tag can take a number of values. These are: 'y' for yes; n for no;
'sat' for a SDC entirely located in a saturated portion of the
Herschel images; 'ysat' for a cloud that is considered real despite
being partially saturated; 'out' for a SDC that is not covered by
Herschel images; 'yout' for a cloud that is considered real despite
being partially covered by Herschel images; 'nout' for a cloud
considered spurious despite being partially covered by Herschel
images. Also, note that the column referring to the equivalent radius
Req is the same quantity as the one quoted in Table 1 column 11 of
Peretto & Fuller (2009, Cat. J/A+A/505/405). However, these latter
values should be discarded since a mistake has been found in the
calculation of the equivalent radius. Only the new values, the ones
provided in Table 1 column 2 of this paper should be considered.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 87 11296 Herschel analysis of SDCs
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See also:
J/A+A/505/405 : A catalogue of Spitzer dark clouds (Peretto+, 2009)
J/MNRAS/451/3089 : Young clumps embedded in IRDC (Traficante+, 2015)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [SDC]
4- 16 A13 --- SDC SDC name (LLL.ll+B.bbb),
SDC GLLL.lll+B.bbb in Simbad
19- 23 F5.1 arcsec Req ? Equivalent radius of SDC
27- 31 F5.2 10+22cm-2 NH2-in ? Average Herschel column density in SDC
boundaries
35- 39 F5.2 10+22cm-2 NH2-out ? Average Herschel column density outside
SDC boundaries
42- 46 F5.2 10+22cm-2 e_NH2-in ? Average Herschel column density noise
in SDC boundaries
49- 54 F6.2 10+22cm-2 NH2-pk ? Peak Herschel column density in SDC
boundaries
58- 63 F6.2 --- c1 ? Criterion 1
66- 72 F7.2 --- c2 ? Criterion 2
75- 81 F7.2 --- c3 ? Criterion 3
84- 87 A4 --- Det? Detection flag (1)
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Note (1): Tag indicating if the cloud is identified as real (y) or not (n),
or if it is saturated (sat) or lying outside the Herschel coverage (out).
y = cloud has been identified as real by our automated detection scheme
based on the values of c1 and c2
n = cloud has been identified as not real by our automated detection scheme
based on the values of c1 and c2
sat = SDC entirely located in a saturated portion of the Herschel images
ysat = cloud that is considered real despite being partially saturated
out = SDC that is not covered by Herschel images
yout = cloud that is considered real despite being partially covered by
Herschel images
nout = cloud considered spurious despite being partially covered by
Herschel images
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Acknowledgements:
Nicolas Peretto, nicolas.peretto(at)astro.cf.ac.uk
References:
Peretto & Fuller, Paper I 2009A&A...505..405P 2009A&A...505..405P, Cat. J/A+A/505/405
Traficante et al., Paper II 2015MNRAS.451.3089T 2015MNRAS.451.3089T, Cat. J/MNRAS/451/3089
(End) Nicolas Peretto [Cardiff Univ., UK], Patricia Vannier [CDS] 25-Mar-2016