The relation between optical extinction and hydrogen column density in the Galaxy

Guever T., Oezel F.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, cilt.400, sa.4, ss.2050-2053, 2009 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 400 Sayı: 4
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1111/j.1365-2966.2009.15598.x
  • Dergi Adı: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.2050-2053
  • Anahtar Kelimeler: dust, extinction, supernova remnants, X-rays: ISM, X-RAY SPECTROSCOPY, GALACTIC SUPERNOVA REMNANT, INTERSTELLAR-MEDIUM, XMM-NEWTON, ROSAT OBSERVATIONS, CHANDRA OBSERVATION, CRAB-NEBULA, CTB 1, EMISSION, ABSORPTION
  • İstanbul Üniversitesi Adresli: Hayır

Özet

A linear relation between the hydrogen column density (N-H) and optical extinction (A(V)) in the Galaxy has long been observed. A number of studies found differing results in the slope of this relation. Here, we utilize the data on 22 supernova remnants that have been observed with the latest generation X-ray observatories and for which optical extinction and/or reddening measurements have been performed and find N-H (cm-2) = (2.21 +/- 0.09) x 1021 A(V) (mag). We compare our result with the previous studies and assess any systematic uncertainties that may affect these results.