H alpha 3: an H alpha imaging survey of HI selected galaxies from ALFALFA: I. Catalogue in the Local Supercluster
The authors present H alpha 3, an H alpha narrow-band imaging survey of similar to 400 galaxies selected from the H I Arecibo Legacy Fast ALFA Survey in the Local Supercluster, including the Virgo cluster. By using hydrogen recombination lines as a tracer of recent star formation, the authors aim to...
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Published in | Astronomy and astrophysics (Berlin) Vol. 545; p. 1 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
01.09.2012
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Subjects | |
Online Access | Get full text |
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Summary: | The authors present H alpha 3, an H alpha narrow-band imaging survey of similar to 400 galaxies selected from the H I Arecibo Legacy Fast ALFA Survey in the Local Supercluster, including the Virgo cluster. By using hydrogen recombination lines as a tracer of recent star formation, the authors aim to investigate the relationships between atomic neutral gas and newly formed stars in different environments, morphological types, and over a wide range of stellar masses. This survey provides a complete census of the star formation in H I rich galaxies of the local universe. The authors present the properties of the galaxy sample, together with H alpha fluxes and equivalent widths. They find an excellent agreement between the fluxes determined from our images in apertures of 3 arcsec diameter and the fluxes derived from the SDSS spectral database. From the H alpha fluxes corrected for galactic and internal extinction and for N II contamination they derive the global star formation rates. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 ObjectType-Article-1 ObjectType-Feature-2 |
ISSN: | 0004-6361 1432-0746 |