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J/BaltA/11/231      Extinction in MBM12                (Straizys+, 2002)

Photometric investigation of the MBM 12 molecular cloud area in Aries. II. Cloud distance. Straizys V., Cernis K., Kazlauskas A., Laugalys V. <Baltic Astron., 11, 231 (2002)> =2002BaltA..11..231S
ADC_Keywords: Molecular clouds ; Photometry, Vilnius ; Stars, distances ; Extinction Keywords: stars: fundamental parameters, classification - ISM: dust, extinction, clouds - ISM: individual objects: MBM 12, L1454, L1457 Abstract: Photoelectric magnitudes and color indices in the Vilnius seven-color system for 152 stars are used to investigate the interstellar extinction in the area of the Aries molecular cloud MBM 12, coinciding with the L1454 and L1457 dust clouds. Spectral types, absolute magnitudes, color excesses, interstellar extinctions and distances of the stars are determined. The plot of interstellar extinction Av versus distance shows that the dust cloud is situated at a distance of 325pc, at 180pc from the Galactic plane, and its true diameter is about 11pc. The interstellar extinction law in the area is found to be normal, typical for the diffuse dust. Ten peculiar or unresolved binary stars and some heavily reddened stars are detected. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 95 152 Results of photometric quantification, determination of color excesses, extinctions, and distances of the stars. notes.dat 80 47 Individual notes
See also: J/BaltA/11/219 : MBM 12 Vilnius photometry (Kazlauskas+, 2002) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Seq Sequential number 4 A1 --- n_Seq [*] indicates a note in notes.dat file 6- 14 A9 --- GSC GSC number 17 I1 h RAh Right ascension (J2000) 19- 20 I2 min RAm Right ascension (J2000) 22- 23 I2 s RAs Right ascension (J2000) 25 A1 --- DE- Declination sign (J2000) 26- 27 I2 deg DEd Declination (J2000) 29- 32 F4.1 arcmin DEm Declination (J2000) 34- 46 A13 --- SpType MK Spectral type determined photometrically 49- 56 A8 --- SpType2 MK Spectral type form other sources (HD, AGK, PPM catalogs) 59- 63 F5.2 mag Vmag Vilnius V magnitude 65- 68 F4.1 mag VMAG ? Absolute V magnitude 69 A1 --- u_VMAG Uncertainty flag on VMAG 71- 74 F4.2 mag E(Y-V) ? Vilnius Y-V colour excess 75 A1 --- u_E(Y-V) Uncertainty flag on E(Y-V) 77- 80 F4.2 mag AV ? Extinction in V band 81 A1 --- u_AV Uncertainty flag on AV 83- 86 I4 pc Dist ? Distance 87 A1 --- u_Dist Uncertainty flag on Dist 89- 92 F4.2 mag sQ ? Classification accuracy 93- 95 A3 --- n_sQ Q,Q when the star was classified by the Q,Q diagram, not by the sQ method
Byte-by-byte Description of file: notes.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Seq Sequential number 5- 80 A76 --- Note Text of the note
History: Prepared via OCR at CDS. References: Straizys et al., Paper I, 2002BaltA..11..219S, Cat. J/BaltA/11/219
(End) James Marcout, Patricia Bauer [CDS] 04-Feb-2003
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