Título
Submm/mm Galaxy Counterpart Identification Using a Characteristic Density Distribution
Autor
Itziar Aretxaga
David Hughes
Nivel de Acceso
Acceso Abierto
Materias
Submillimetre: galaxies - (INSPEC) Radio continuum: galaxies - (INSPEC) Infrared: galaxies - (INSPEC) Galaxies: high redshift - (INSPEC) Techniques: photometric - (INSPEC) Methods: data analysis - (INSPEC) CIENCIAS FÍSICO MATEMÁTICAS Y CIENCIAS DE LA TIERRA - (CTI) ASTRONOMÍA Y ASTROFÍSICA - (CTI) RADIOASTRONOMÍA - (CTI) RADIOASTRONOMÍA - (CTI)
Resumen o descripción
We present a new submm/mm galaxy counterpart identification technique whichbuilds on the use of Spitzer IRAC colors as discriminators between likely counter-parts and the general IRAC galaxy population. Using 102 radio- and SMA-confirmedcounterparts to AzTEC sources across three fields (GOODS-N, GOODS-S, and COSMOS), we develop a non-parametric IRAC color-color characteristic density distribution (CDD), which, when combined with positional uncertainty information vialikelihood ratios, allows us to rank all potential IRAC counterparts around SMGsand calculate the significance of each ranking via the reliability factor. We reportall robust and tentative radio counterparts to SMGs, the first such list available forAzTEC/COSMOS, as well as the highest ranked IRAC counterparts for all AzTECSMGs in these fields as determined by our technique. We demonstrate that the technique is free of radio bias and thus applicable regardless of radio detections. For observations made with a moderate beamsize (∼18′′), this technique identifies ∼85 percent of SMG counterparts. For much larger beamsizes (≳30′′), we report identificationrates of 33-49 per cent. Using simulations, we demonstrate that this technique is animprovement over using positional information alone for observations with facilities such as AzTEC on the LMT and SCUBA-2 on JCMT.
Editor
Monthly Notices of the Royal Astronomical Society
Fecha de publicación
25 de enero de 2013
Tipo de publicación
Artículo
Versión de la publicación
Versión aceptada
Recurso de información
Formato
application/pdf
Idioma
Inglés
Audiencia
Estudiantes
Investigadores
Público en general
Sugerencia de citación
Alberts, Stacey., et al., (2013). Submm/mm galaxy counterpart identification using a characteristic density distribution, Monthly Notices of the Royal Astronomical Society, Vol. 431(1):1-30
Repositorio Orígen
Repositorio Institucional del INAOE
Descargas
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