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Hα and UV imaging of Low Surface Brightness Galaxies and Extended UV Disks

Wyder, Ted K. and Treyer, Marie A. (2011) Hα and UV imaging of Low Surface Brightness Galaxies and Extended UV Disks. In: Up2010: Have Observations Revealed a Variable Upper End of the Initial Mass Function? ASP Conference Series. No.440. Astronomical Society of the Pacific , San Francisco, CA, pp. 235-239. ISBN 978-1-58381-760-5.

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GALEX observations have revealed UV emission extending far beyond the optical and H-alpha disks of several nearby spiral galaxies, raising the question of possible massive star deficiency, i.e., deviations from the standard 'universal' stellar initial mass function (IMF) at the upper end, in certain low density environments. We have undertaken an Hα imaging survey of low surface brightness galaxies observed by GALEX and with existing HI maps with the aim of investigating the variation of the Hα/UV ratio with the local density. Here we present preliminary results for 14 such galaxies observed with the Large Format Camera on the Palomar 200 inch telescope using custom narrow band filters.

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Additional Information:© 2011 Astronomical Society of the Pacific. GALEX is a NASA Small Explorer, launched in 2003 April. We gratefully acknowledge NASA's support for construction, operation, and science analysis for the GALEX mission, developed in cooperation with the Centre National d'Etudes Spatiales of France and the Korean Ministry of Science and Technology.
Group:Space Astrophysics Laboratory
Series Name:ASP Conference Series
Issue or Number:440
Record Number:CaltechAUTHORS:20110622-152009146
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:24170
Deposited By: Jason Perez
Deposited On:22 Jun 2011 22:37
Last Modified:03 Oct 2019 02:53

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