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Título:
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Near-infrared and star-forming properties of local luminous infrared galaxies
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Autores:
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Alonso Herrero, Almudena ;
Rieke, George H. ;
Rieke, Marcia J. ;
Colina, Luis ;
Pérez González, Pablo Guillermo ;
Ryder, Stuart D.
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Tipo de documento:
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texto impreso
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Editorial:
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American Astronomical Society, 2006-10-20
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Astrofísica
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Materia = Ciencias: Física: Astronomía
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Tipo = Artículo
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Resumen:
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We use Hubble Space Telescope (HST) NICMOS continuum and Pa? observations to study the near-infrared and star formation properties of a representative sample of 30 local (d ~ 35-75 Mpc) luminous infrared galaxies (LIRGs, infrared [8-1000 ?m] luminosities of log L_IR = 11-11.9 L_?). The data provide spatial resolutions of 25-50 pc and cover the central ~3.3-7.1 kpc regions of these galaxies. About half of the LIRGs show compact (~1-2 kpc) Pa? emission with a high surface brightness in the form of nuclear emission, rings, and minispirals. The rest of the sample show Pa? emission along the disk and the spiral arms extending over scales of 3-7 kpc and larger. About half of the sample contains H II regions with H? luminosities significantly higher than those observed in normal galaxies. There is a linear empirical relationship between the mid-IR 24 ?m and hydrogen recombination (extinction-corrected Pa?) luminosity for these LIRGs, and the H II regions in the central part of M51. This relation holds over more than four decades in luminosity, suggesting that the mid-IR emission is a good tracer of the star formation rate (SFR). Analogous to the widely used relation between the SFR and total IR luminosity of R. Kennicutt, we derive an empirical calibration of the SFR in terms of the monochromatic 24 ?m luminosity that can be used for luminous, dusty galaxies.
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En línea:
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https://eprints.ucm.es/38725/1/perezgonzalez95libre.pdf
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