J/ApJS/115/59 Cepheus flare molecular clouds (Kun, 1998)
Star formation in the Cepheus flare molecular clouds.
I. Distance determination and the young stellar object candidates.
Kun M.
<Astrophys. J. Suppl. Ser. 115, 59 (1998)>
=1998ApJS..115...59K 1998ApJS..115...59K
ADC_Keywords: Molecular clouds ; YSOs ; Infrared sources ; Stars, distances
Keywords: ISM: clouds - ISM: individual (Cepheus Flare) -
stars: pre-main-sequence - surveys
Abstract:
Results of an objective prism Schmidt survey are combined with IRAS
survey data in order to assess the star-forming activity in the
Cepheus Flare, a nearby giant molecular cloud complex at ∼15°
above the Galactic equator. The distribution of absorbing matter along
the line of sight was also studied. The Wolf diagrams, displaying the
cumulative distribution of field star distance moduli, show that the
interstellar matter in this region is concentrated at three
characteristic distances: 200, 300, and 450pc. The three components,
though partly overlapping, can be separated along the Galactic
latitude. Within the area of the Cepheus Flare, distances are
determined for 14 Lynds dark clouds and for some other clouds.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 65 32 IRAS Point Sources adopted as uncataloged
galaxies based on their optical appearance
table2.dat 122 122 IRAS Point Sources adopted as YSO candidates
in the Cepheus flare region
table3.dat 97 142 Hα emission stars in the Cepheus flare region
table5.dat 134 107 Dense cores found in the IRAS 100µm optical
depth image
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See also:
II/125 : IRAS catalogue of Point Sources, Version 2.0 (IPAC 1986)
V/73 : Emission-Line Stars of the Orion Population (Herbig+ 1988)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- IRAS IRAS Name (Cat. II/125)
12 A1 --- n_IRAS [a] Individual note (1)
14- 15 I2 h RAh Right ascension (1950)
17- 18 I2 min RAm Right ascension (1950)
20- 23 F4.1 s RAs Right ascension (1950)
25 A1 --- DE- Declination sign (1950)
26- 27 I2 deg DEd Declination (1950)
29- 30 I2 arcmin DEm Declination (1950)
32- 33 I2 arcsec DEs Declination (1950)
35 A1 --- l_F12um Limit flag on F12um
36- 40 F5.3 Jy F12um Flux at 12µm
42 A1 --- l_F25um Limit flag on F25um
43- 47 F5.3 Jy F25um Flux at 25µm
48 A1 --- u_F25um rms uncertainty on F25um
51- 55 F5.3 Jy F60um Flux at 60µm
56 A1 --- u_F60um rms uncertainty on F60um
58 A1 --- l_F100um Limit flag on F100um
59- 64 F6.3 Jy F100um Flux at 100µm
65 A1 --- u_F100um rms uncertainty on F100um
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Note (1): a: The optical source coinciding with IRAS 21358+7020 is
very faint. It is not possible, based on the DSS image, to decide
whether it is a galaxy or a star.
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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- 11 A11 --- IRAS IRAS name (Cat. II/125) or IRAS Faint (II/156)
12 A1 --- n_IRAS [a] a: This source may be identical with the
preceding PSC source
14- 15 I2 h RAh Right ascension (1950)
17- 18 I2 min RAm Right ascension (1950)
20- 23 F4.1 s RAs Right ascension (1950)
25 A1 --- DE- Declination sign (1950)
26- 27 I2 deg DEd Declination (1950)
29- 30 I2 arcmin DEm Declination (1950)
32- 33 I2 arcsec DEs Declination (1950)
35 A1 --- l_F12um Limit flag on F12um
36- 41 F6.3 Jy F12um ? Flux at 12µm
42 A1 --- n_F12um [c] Note on F12um (1)
44 A1 --- l_F25um Limit flag on F25um
45- 50 F6.3 Jy F25um ? Flux at 25µm
51 A1 --- n_F25um [c] Note on F25um (1)
53 A1 --- l_F60um Limit flag on F60um
54- 60 F7.3 Jy F60um ? Flux at 60µm
61 A1 --- u_F60um rms uncertainty on F60um
63 A1 --- l_F100um Limit flag on F1060um
64- 71 F8.3 Jy F100um ? Flux at 100µm
72 A1 --- u_F100um Uncertainty flag on F100um
74 A1 --- l_LIRAS Limit flag on LIRAS
75- 80 F6.2 solLum LIRAS IRAS luminosity
82- 93 A12 --- Name Name of associated object (2)
95-109 A15 --- Type Type of associated object (3)
110 A1 ---- n_Type [b] Note on Type (4)
112-116 F5.2 mag Vmag ? V magnitude
118-122 A5 --- Ref Reference (5)
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Note (1): c: The source is a part of an extended or multiple structure at
this IRAS band.
Note (2): G stands for GSC, and OS is for Ogura & Sato, 1990PASJ...42..583O 1990PASJ...42..583O.
Note (3): This column indicates the optical appearance of the IRAS sources.
Type is not given, where the source is in a nebulous background,
especially in NGC 7023.
Note (4): b: Objective prism spectral type obtained during this work.
Note (5): References are numbered as follows:
1 = Herbig & Bell, 1988LicOB1111....1H 1988LicOB1111....1H, Cat. V/73
2 = Fukui et al., 1993, in Protostars and Planets III,
ed. E.H. Levy & J.I. Lunine (Tucson: Univ. Arizona Press), 603
3 = Myers et al., 1987ApJ...319..340M 1987ApJ...319..340M
4 = Cohen, 1980AJ.....85...29C 1980AJ.....85...29C
5 = Ogura & Sato, 1990PASJ...42..583O 1990PASJ...42..583O
6 = Oudmaijer et al., 1992A&AS...96..625O 1992A&AS...96..625O
7 = Yun, 1996AJ....111..930Y 1996AJ....111..930Y
8 = Racine, 1968AJ.....73..233R 1968AJ.....73..233R
9 = Benson & Myers, 1989ApJS...71...89B 1989ApJS...71...89B
10 = Kun & Prusti, 1993, Cat. J/A+A/272/235
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [K98c]Em* Sequential number, [K98c] Em* NNN in Simbad
5- 6 I2 h RAh Right ascension (1950)
8- 9 I2 min RAm Right ascension (1950)
11- 14 F4.1 s RAs Right ascension (1950)
16 A1 --- DE- Declination sign (1950)
17- 18 I2 deg DEd Declination (1950)
20- 21 I2 arcmin DEm Declination (1950)
23- 24 I2 arcsec DEs Declination (1950)
26- 27 A2 --- IHalpha Visual estimate of the intensity of the
Hα line (1)
29- 33 F5.2 mag Vmag ? V magnitude for Guide Star Catalog
35 A1 --- l_F12um Limit flag on F12um
36- 41 F6.3 Jy F12um ? Flux at 12µm
42 A1 --- u_F12um rms uncertainty on F12um
44 A1 --- l_F25um Limit flag on F25um
45- 50 F6.3 Jy F25um ? Flux at 25µm
51 A1 --- u_F25um rms uncertainty on F25um
52 A1 --- l_F60um Limit flag on F60um
53- 58 F6.3 Jy F60um ? Flux at 60µm
59 A1 --- u_F60um rms uncertainty on F60um
62- 66 F5.2 Jy F100um ? Flux at 100µm
69- 79 A11 --- IRAS IRAS name (Cat. II/125)
81- 87 A7 --- OName Other name
89- 97 F9.4 --- GSC ? GSC number (Cat. I/254)
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Note (1): Visual estimate of Hα intensity line is classified as follows:
vs: very strong
s: strong
m: medium
w: weak
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [K98c]Core Sequential number, [K98c] Core NNN in Simbad
5- 6 I2 h RAh Peak optical depth Right ascension (1950)
8- 9 I2 min RAm Peak optical depth Right ascension (1950)
11- 14 F4.1 s RAs Peak optical depth Right ascension (1950)
16 A1 --- DE- Peak optical depth Declination sign (1950)
17- 18 I2 deg DEd Peak optical depth Declination (1950)
20- 21 I2 arcmin DEm Peak optical depth Declination (1950)
23- 24 I2 arcsec DEs Peak optical depth Declination (1950)
26- 32 F7.3 deg GLON Peak optical depth Galactic longitude
34- 39 F6.3 deg GLAT Peak optical depth Galactic latitude
41- 44 F4.1 K Td Peak optical depth Temperature
46- 48 I3 10+6 Tau100 Peak optical depth
50- 53 F4.1 mag AV Peak optical depth Absorption in V band
55- 56 I2 h RAEh Ellipse Right ascension (1950)
58- 59 I2 min RAEm Ellipse Right ascension (1950)
61- 64 F4.1 s RAEs Ellipse Right ascension (1950)
66 A1 --- DEE- Ellipse Declination sign (1950)
67- 68 I2 deg DEEd Ellipse Declination (1950)
70- 71 I2 arcmin DEEm Ellipse Declination (1950)
73- 74 I2 arcsec DEEs Ellipse Declination (1950)
76- 79 F4.2 pc rMaj Ellipse major axis
81- 84 F4.2 pc rMin Ellipse minor axis
86- 88 I3 deg PA Position angle
90- 94 F5.2 pc+2 Area Core Area
96- 99 I4 solMass Mass Core mass
101-103 I3 pc Dist Core distance
105-117 A13 --- Cloud Associated cloud names (1)
119-134 A16 --- Star Associated star names
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Note (1): N refers to the 13CO clouds of the Nagoya survey
(Yonekura et al., 1997, Cat. J/ApJS/110/21),
[YDM97] CO NNN in Simbad
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History:
* 22-Sep-2003: From electronic version of the journal
* 19-Jul-2005: table1: IRAS names checked against IRAS and
IRAS Faint Sources; 8 names corrected.
(End) James Marcout, Patricia Bauer [CDS] 22-Sep-2003