MBM 12 and MBM 16 distances
J. Knude, H.E.P. Lindstr{\o}m

TL;DR
This study introduces a photometric method using SDSS data to determine distances and extinctions of molecular clouds MBM 12 and MBM 16 with about 20-26% precision, confirming their distances at approximately 160 and 100 parsecs.
Contribution
The paper presents a novel photometric approach to estimate distances and extinctions of molecular clouds using SDSS color indices, with specific application to MBM 12 and MBM 16.
Findings
Distances to MBM 12 and MBM 16 are approximately 160 pc and 100 pc.
The method achieves 20-26% accuracy in stellar distance estimates.
Extinction estimates are accurate within 0.2 mag for most stars.
Abstract
Among the multitude of intrinsic SDSS index vs. index diagrams the diagram is characterized by showing only minor variation for the M dwarfs. The reddening vector has a slope almost identical to the slope of the main sequence earlier than M2, meaning that dwarfs later than M2 are not contaminated by reddened dwarfs of earlier type. Chemical composition, stellar activity and evolution have only minor effects on the location of the M2M7 dwarfs in the diagram implying that reddening may be isolated in a rather unique way. From , and we may construct distance vs. diagrams. This purely photometric method is applied on SDSS DR8 data in the MBM 12 region. We derive individual stellar distances with a precision %. For extinctions in the the…
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Taxonomy
TopicsAstronomy and Astrophysical Research · Stellar, planetary, and galactic studies · SAS software applications and methods
