Astronomy and Astrophysics, volume 611A, 9-9 (2018/3-1)
High-latitude dust clouds LDN 183 and LDN 169: distances and extinctions.
STRAIZYS V., BOYLE R.P., ZDANAVICIUS J., JANUSZ R., CORBALLY C.J., MUNARI U., ANDERSSON B.-G., ZDANAVICIUS K., KAZLAUSKAS A., MASKOLIUNAS M., CERNIS K. and MACIJAUSKAS M.
Abstract (from CDS):
Interstellar extinction is investigated in a 2°x 2° area containing the dust and molecular clouds LDN 183 (MBM 37) and LDN 169, which are located at RA=15h54m,Dec=-3°. The study is based on a photometric classification in spectral and luminosity classes of 782 stars selected from the catalogs of 1299 stars down to V=20mag observed in the Vilnius seven-color system. For control, the MK types for the 18 brightest stars with V between 8.5 and 12.8mag were determined spectroscopically. For 14 stars, located closer than 200pc, distances were calculated from trigonometric parallaxes taken from the Gaia Data Release 1. For about 70% of the observed stars, two-dimensional spectral types, interstellar extinctions AV, and distances were determined. Using 57 stars closer than 200pc, we estimate that the front edge of the clouds begins at 105±8pc. The extinction layer in the vicinities of the clouds can be about 20pc thick. In the outer parts of the clouds and between the clouds, the extinction is 0.5-2.0mag. Behind the Serpens/Libra clouds, the extinction range does not increase; this means that the dust layer at 105pc is a single extinction source.
© ESO 2018
stars: fundamental parameters - ISM: clouds - dust, extinction - ISM: individual objects: LDN 169 - ISM: individual objects: LDN 183 (MBM 37)
VizieR on-line data:
<Available at CDS (J/A+A/611/A9): table1.dat table2.dat>
Table 1: [SBZ2018] NNN (Nos 1-830). Table 2: [SBZ2018] NNNN (Nos 1-001-1483).
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