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 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 2002BaltA..11..219S, Cat. J/BaltA/11/219
(End) James Marcout, Patricia Bauer [CDS] 04-Feb-2003