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

Tolga Güver; Feryal Özel

doi:10.1111/j.1365-2966.2009.15598.x

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

Tolga Güver, Feryal Özel

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516 Scopus citations

Abstract

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 andor reddening measurements have been performed and find N_H (cm ^-2) = (2.21 ± 0.09) × 10²¹ A_V (mag). We compare our result with the previous studies and assess any systematic uncertainties that may affect these results.

Original language	English (US)
Pages (from-to)	2050-2053
Number of pages	4
Journal	Monthly Notices of the Royal Astronomical Society
Volume	400
Issue number	4
DOIs	https://doi.org/10.1111/j.1365-2966.2009.15598.x
State	Published - Dec 2009

Keywords

Dust, extinction
Supernova remnants
X-rays: ISM

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1111/j.1365-2966.2009.15598.x

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title = "The relation between optical extinction and hydrogen column density in the Galaxy",

abstract = "A linear relation between the hydrogen column density (NH) and optical extinction (AV) 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 andor reddening measurements have been performed and find NH (cm -2) = (2.21 ± 0.09) × 1021 AV (mag). We compare our result with the previous studies and assess any systematic uncertainties that may affect these results.",

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AU - Özel, Feryal

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AB - A linear relation between the hydrogen column density (NH) and optical extinction (AV) 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 andor reddening measurements have been performed and find NH (cm -2) = (2.21 ± 0.09) × 1021 AV (mag). We compare our result with the previous studies and assess any systematic uncertainties that may affect these results.

KW - Dust, extinction

KW - Supernova remnants

KW - X-rays: ISM

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

Abstract

Keywords

ASJC Scopus subject areas

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