VII/191 Catalogue of Southern Dark Clouds (Hartley+ 1986)
A catalogue of southern dark clouds
Hartley M., Manchester R.N., Smith R.M., Tritton S.B., Goss W.M.
<Astron. Astrophys. Suppl. Ser. 63, 27 (1986)>
=1986A&AS...63...27H 1986A&AS...63...27H
ADC_Keywords: Nebulae
Keywords: dark clouds - interstellar matter - star formation - Gould's Belt
Description (Abstract):
A catalogue of 1101 dark clouds has been compiled from visual
inspection of ESO/SERC Southern J survey plates for declinations south
of -33deg. This catalogue complements that of Lynds
(1962ApJS....7....1L 1962ApJS....7....1L) which is based on the Palomar Sky Survey.
Equatorial positions of accuracy 10 arcsec or better are listed for
each cloud along with size (major axis x minor axis), density class
and ESO/SERC field number. Galactic coordinates, derived from the
equatorial positions, are used to define a name for each cloud.
Complexes, consisting of several separately identifiable
concentrations, are listed and identified by a trailing C on the name.
The conclusions of Lynds, that clouds are concentrated along the
galactic equator and toward the galactic centre, are reinforced. No
clear connection with Gould's Belt is evident in the distribution of
southern clouds.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 88 1101 The catalogue of Southern Dark Clouds (DCld)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- DCld *[0-9.±] Dark Cloud name
11 A1 --- n_DCld [C] 'C' indicates a complex structure
13- 14 I2 h RAh Right Ascension 1950 (hours)
16- 17 I2 min RAm Right Ascension 1950 (minutes)
19- 20 I2 s RAs Right Ascension 1950 (seconds)
22 A1 --- DE- Declination 1950 (sign)
23- 24 I2 deg DEd Declination 1950 (degrees)
26- 29 F4.1 arcmin DEm Declination 1950 (minutes)
31- 35 F5.1 arcmin Size1 *Largest angular size
36 A1 --- --- [x] separator
37- 41 F5.1 arcmin Size2 *Second angular size
43 A1 --- Density *[ABC] Density class
45- 47 I3 --- Field Field or Plate number of ESO/SERC survey
49- 88 A40 --- Comments *Text of Comments
--------------------------------------------------------------------------------
Note on DCld:
The name is made from galactic longitude and latitude of the centroid.
Note on Size1, Size2:
In the case of some curved and elongated clouds, Size1 represents
the total length of the cloud rather than the overall dimension;
therefore the product of Size1 x Size2 approximates the area
of the cloud.
Note on Density: densities are represented by a 3-letter scale
with A being the most dense and C the least dense.
Statistics and comparison with Lynds (1962ApJS....7....1L 1962ApJS....7....1L)
opacity classes:
------------------------------------------------------------
Density No. of Mean Size Median Size Lynds'
Class Clouds (sq. arc min.) (sq. arc min.) opacity
------------------------------------------------------------
A 432 100 22 6
B 493 560 65 4 or 5
C 176 420 105 ≤ 3
------------------------------------------------------------
All 1101 355 50
------------------------------------------------------------
Note on Comments: the following abbreviations are used:
CG = cometary globule
DC = dark cloud
RN = reflection nebula
S-O = Sco-Oph complex which extends into the Sct region.
Designations preceded by S refer to Sandqvist and Lindroos
(1976A&A....53..179S 1976A&A....53..179S) and Sandqvist (1977A&A....57..467S 1977A&A....57..467S)
--------------------------------------------------------------------------------
Nomenclature Notes:
Sources from this catalogue are preferably designated
≪DCld LLL.l+BB.b≫ rather than ≪DC LLL.l+BB.b≫
See also:
VII/7 : Lynds' Catalogue of Dark Nebulae (LDN)
Historical Notes:
* 21-Feb-1996: The catalogue was keypunched at CDS.
* 13-Jul-2004: A few (keypunching) errors on names and positions corrected.
(End) James Marcout, Francois Ochsenbein [CDS] 21-Feb-1996