Dust properties in the far-ultraviolet in Ophiuchus

N. V. Sujatha; P. Shalima; Jayant Murthy; Richard Conn Henry

doi:10.1086/444532

Dust properties in the far-ultraviolet in Ophiuchus

N. V. Sujatha^*, P. Shalima, Jayant Murthy, Richard Conn Henry

^*Corresponding author for this work

Manipal Centre for Natural Sciences, Manipal

Research output: Contribution to journal › Article › peer-review

25 Citations (Scopus)

Abstract

We have derived the albedo (a) and phase function asymmetry factor (g) of interstellar dust grains at 1100 Å using archival Voyager observations of diffuse radiation in Ophiuchus. We have found that the grains are highly forward-scattering, with g = 0.55 ± 0.25 and a = 0.40 ± 0.10. Even though most of the gas in this direction is in the Ophiuchus molecular cloud, the diffuse FUV radiation is almost entirely due to scattering in a relatively thin foreground cloud. This suggests that one cannot assume that the UV background is directly correlated with the total amount of gas in any direction.

Original language	English
Pages (from-to)	257-261
Number of pages	5
Journal	Astrophysical Journal
Volume	633
Issue number	1 I
DOIs	https://doi.org/10.1086/444532
Publication status	Published - 01-11-2005

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/444532

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title = "Dust properties in the far-ultraviolet in Ophiuchus",

abstract = "We have derived the albedo (a) and phase function asymmetry factor (g) of interstellar dust grains at 1100 {\AA} using archival Voyager observations of diffuse radiation in Ophiuchus. We have found that the grains are highly forward-scattering, with g = 0.55 ± 0.25 and a = 0.40 ± 0.10. Even though most of the gas in this direction is in the Ophiuchus molecular cloud, the diffuse FUV radiation is almost entirely due to scattering in a relatively thin foreground cloud. This suggests that one cannot assume that the UV background is directly correlated with the total amount of gas in any direction.",

author = "Sujatha, \{N. V.\} and P. Shalima and Jayant Murthy and Henry, \{Richard Conn\}",

year = "2005",

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T1 - Dust properties in the far-ultraviolet in Ophiuchus

AU - Sujatha, N. V.

AU - Shalima, P.

AU - Murthy, Jayant

AU - Henry, Richard Conn

PY - 2005/11/1

Y1 - 2005/11/1

N2 - We have derived the albedo (a) and phase function asymmetry factor (g) of interstellar dust grains at 1100 Å using archival Voyager observations of diffuse radiation in Ophiuchus. We have found that the grains are highly forward-scattering, with g = 0.55 ± 0.25 and a = 0.40 ± 0.10. Even though most of the gas in this direction is in the Ophiuchus molecular cloud, the diffuse FUV radiation is almost entirely due to scattering in a relatively thin foreground cloud. This suggests that one cannot assume that the UV background is directly correlated with the total amount of gas in any direction.

AB - We have derived the albedo (a) and phase function asymmetry factor (g) of interstellar dust grains at 1100 Å using archival Voyager observations of diffuse radiation in Ophiuchus. We have found that the grains are highly forward-scattering, with g = 0.55 ± 0.25 and a = 0.40 ± 0.10. Even though most of the gas in this direction is in the Ophiuchus molecular cloud, the diffuse FUV radiation is almost entirely due to scattering in a relatively thin foreground cloud. This suggests that one cannot assume that the UV background is directly correlated with the total amount of gas in any direction.

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DO - 10.1086/444532

M3 - Article

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SN - 0004-637X

VL - 633

SP - 257

EP - 261

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 I

ER -

Dust properties in the far-ultraviolet in Ophiuchus

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