Gray Extinction in the Orion Trapezium

• Autorzy: Krełowski J. , Galazutdinov G. A. , Strobel A. , Mulas G.
• Języki publikacji: EN

Abstrakty

EN

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

Słowa kluczowe

EN

ISM: clouds; dust; extinction

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 2016
• Tom: Vol. 66, No. 4
• Strony: 469--480
• Opis fizyczny: Bibliogr. 30 poz., tab., wykr.

Twórcy

autor

Krełowski J.

• Center for Astronomy, Nicholas Copernicus University, Gagarina 11, Pl-87-100 Toruń, Poland

autor

Galazutdinov G. A.

• Instituto de Astronomia, Universidad Catolica del Norte, Av. Angamos 0610, Antofagasta, Chile
• Pulkovo Observatory, Pulkovskoe Shosse 65, Saint-Petersburg
• Special Astrophysical Observatory, Nizhnij Arkhyz, 369167, Russia

autor

Strobel A.

• Center for Astronomy, Nicholas Copernicus University, Gagarina 11, Pl-87-100 Toruń, Poland

autor

Mulas G.

• INAF - Osservatorio Astronomico di Cagliari, Via della Scienza 5 - 09047, Selargius, Italy

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