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http://hdl.handle.net/20.500.12386/24969| Title: | Gray Extinction in the Orion Trapezium | Authors: | Krełowski, J. Galazutdinov, G. A. Strobel, A. MULAS, Giacomo |
Issue Date: | 2016 | Journal: | ACTA ASTRONOMICA | Number: | 66 | Issue: | 4 | First Page: | 469 | Abstract: | We estimated distances to several Orion Trapezium stars using our CaII-method and confirm the distance recommended by Menten et al. However, we found that in the case of HD 37020 both individual distances (based on the trigonometric VLBI parallax and/or CaII-method) differ from the spectrophotometric distance by a factor of 2.5. We interpret this fact as a result of presence of gray (neutral) extinction of about 1.8 mag in front of this star. The correctness of the applied spectral type/ luminosity class, Sp/L, (based on new original spectra from HARPS-N) and measurements of color indices is discussed. <P /> | URI: | http://hdl.handle.net/20.500.12386/24969 | URL: | http://acta.astrouw.edu.pl/Vol66/n4/a_66_4_5.html | ISSN: | 0001-5237 | Bibcode ADS: | 2016AcA....66..469K | Fulltext: | open |
| Appears in Collections: | 1.01 Articoli in rivista |
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|---|---|---|---|---|
| pap_66_4_5.pdf | 385.94 kB | Adobe PDF | View/Open |
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