Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
The Astrophysical Journal, 734:13 (7pp), 2011 June 10 doi:10.1088/0004-637X/734/1/13 C 2011. The American Astronomical Society. All rights reserved. Printed in the U.S.A.
 

Summary: The Astrophysical Journal, 734:13 (7pp), 2011 June 10 doi:10.1088/0004-637X/734/1/13
C 2011. The American Astronomical Society. All rights reserved. Printed in the U.S.A.
DUST-SCATTERED ULTRAVIOLET HALOS AROUND BRIGHT STARS
Jayant Murthy1
and Richard Conn Henry2
1 Indian Institute of Astrophysics, Bengaluru 560 034, India; jmurthy@yahoo.com
2 Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, MD 21218, USA
Received 2010 November 26; accepted 2011 March 17; published 2011 May 20
ABSTRACT
We have discovered ultraviolet (UV) halos extending as far as 5
around four (of six) bright UV stars using data
from the Galaxy Evolution Explorer satellite. These halos are due to scattering of the starlight from nearby thin,
foreground dust clouds. We have placed limits of 0.58 0.12 and 0.72 0.06 on the phase function asymmetry
factor (g) in the FUV (1521 ) and NUV (2320 ) bands, respectively. We suggest that these halos are a common
feature around bright stars and may be used to explore the scattering function of interstellar grains at small angles.
Key words: dust, extinction ISM: clouds ultraviolet: ISM
Online-only material: machine-readable table
1. INTRODUCTION
A single bright star may illuminate the interstellar dust to
a considerable distance and, in point of fact, halos around

  

Source: Henry, Richard C.- Department of Physics and Astronomy, Johns Hopkins University

 

Collections: Physics