J/BaltA/17/125 Interstellar reddening in 3 HII regions (Straizys+, 2008)
2MASS two-color interstellar reddening line in the direction of the North
America and Pelican nebulae and the Cyg OB2 association.
Straizys V., Corbally C.J., Laugalys V.
<Baltic Astron., 17, 125-142 (2008)>
=2008BaltA..17..125S 2008BaltA..17..125S
ADC_Keywords: H II regions ; Photometry, infrared
Keywords: ISM: extinction, clouds: individual (L 935) -
ISM: H II regions: individual (North America Nebula, Pelican Nebula) -
associations: individual (Cyg OB2) - stars: fundamental parameters
Abstract:
The slope of the interstellar reddening line in the J-H vs.
H-Ks diagram of the 2MASS survey in the direction of the North America
and Pelican nebulae, the L 935 dust cloud and the Cyg OB2 association
is determined. The MK types were either classified by C.J. Corbally or
collected from the literature. The ratio E(J-H)/E(H-Ks)=2.0 is
obtained by taking the average for the four groups of spectral classes:
O3-B1, B2-B6, B7-B9.5 and red clump giants. The obtained ratio is
among the largest values of E(J-H)/E(H-Ks) determined till now.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 83 206 O-B stars in the vicinity of the North America and
Pelican nebulae and in the Cyg OB2 association
notes.dat 79 31 Individual notes
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See also:
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1 A1 ---- r_Name [bMC] Reference for Cyg OB2 objects (1)
3- 13 A11 --- Name Star name (2)
14 A1 --- n_Name [*] * indicates a note in notes.dat file
16- 25 A10 --- BD/HD BD or HD name
27- 28 I2 h RAh Right ascension (J2000)
30- 31 I2 min RAm Right ascension (J2000)
33- 37 F5.2 s RAs Right ascension (J2000)
39 A1 --- DE- Declination sign (J2000)
40- 41 I2 deg DEd Declination (J2000)
43- 44 I2 arcmin DEm Declination (J2000)
46- 49 F4.1 arcsec DEs Declination (J2000)
51- 55 F5.2 mag Vmag ?=- V magnitude
57- 67 A11 --- SpType MK spectral type
68- 69 A2 --- r_SpType Reference for SpType (3)
71- 76 F6.3 mag J-H ?=- 2MASS J-H colour index
78- 83 F6.3 mag H-Ks ?=- 2MASS H_Ks colour index
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Note (1): Reference for Cyg OB2 objects as follows:
b = Cyg OB2 association: brightest stars
M = Cyg OB2 association: Massey & Thompson 1991, Cat. J/AJ/101/1408
C = Cyg OB2 association: Comeron et al. (2002A&A...389..874C 2002A&A...389..874C) stars
Note (2): Origin of names:
ALS = Reed (1998, Cat. J/ApJS/115/271; 2005, Cat. V/125)
CP05 = Comeron & Pasquali (2005A&A...430..541C 2005A&A...430..541C), [CP2005] NN in Simbad
CPR02 = Comeron et al. (2002A&A...389..874C 2002A&A...389..874C), [CPR2002] ANN in Simbad
MT91 = Massey & Thompson 1991, Cat. J/AJ/101/1408, [MT91] NNN in Simbad
SMV89 = Straizys et al. 1989VilOB..83....3S 1989VilOB..83....3S, [SMV89] NNN in Simbad
SKV-2 = Straizys et al. 1993, Cat. II/196, [SKV93] 2-NNN in Simbad
LS02 = Laugalys & Straizys (2002BaltA..11..205L 2002BaltA..11..205L)
LSV06-1 = Laugalys et al. (2006BaltA..15..327L 2006BaltA..15..327L)
LSV06-22 = Laugalys et al. 2006, Cat. J/BaltA/15/483, Table 2,
[LSV2006] Area II NNN in Simbad
LSV07 = Laugalys et al. (2007BaltA..16..349L 2007BaltA..16..349L),
Cl* Collinder 428 LSV NNN in Simbad
VI Cyg = numbers of the Cyg OB2 association stars from
Johnson & Morgan (1954ApJ...119..344J 1954ApJ...119..344J) and Morgan et al.
(1954PASP...66...85M 1954PASP...66...85M), Schulte NNA in Simbad.
VI Cyg is the former name of the Cyg OB2 association.
Note (3): References for SpType as follows:
* = published in Straizys et al. (1999BaltA...8..355S 1999BaltA...8..355S)
** = published in the present table
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name Star name
13- 79 A67 --- Note Text of the note (1)
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Note (1): Interstellar extinction values AV are from Laugalys & Straizys
(2002BaltA..11..205L 2002BaltA..11..205L)
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 07-Nov-2008