A follow-up survey using the Submillimetre High-Angular Resolution Camera (SHARC-II) at 350 μm has been carried out to map the regions around several 850-μm-selected sources from the Submillimetre HAlf Degree Extragalactic Survey (SHADES). These observations probe the infrared (IR) luminosities and hence star formation rates in the largest existing, most robust sample of submillimetre galaxies (SMGs).We measure 350-μm flux densities for 24 850-μm sources, seven of which are detected at ≥2.5σ within a 10 arcsec search radius of the 850-μm positions. When results from the literature are included the total number of 350-μmflux density constraints of SHADES SMGs is 31, with 15 detections.We fit a modified blackbody to the far-IR (FIR) photometry of each SMG, and confirm that typical SMGs are dust-rich (Mdust = 9 × 10^8Ms), luminous (LFIR = 2 × 10^12 Ls) star-forming galaxies with intrinsic dust temperatures of 35K and star formation rates of 400Myr−1. We have measured the temperature distribution of SMGs and find that the underlying distribution is slightly broader than implied by the error bars, and that most SMGs are at 28K with a few hotter. We also place new constraints on the 350-μm source counts, N350(>25 mJy) ∼ 200–500 deg−2.
The SCUBA HAlf Degree Extragalactic Survey (SHADES) VI. 350 $mu$m mapping of submillimetre galaxies / K., Coppin; M., Halpern; D., Scott; C., Borys; J., Dunlop; L., Dunne; R., Ivison; J., Wagg; I., Aretxaga; Battistelli, Elia Stefano; A., Benson; A., Blain; S., Chapman; D., Clements; S, Dye; D., Farrah; D., Hughes; T., Jenness; E., VAN KAMPEN; C., Lacey; A, Mortier; A., Pope; R., Priddey; S., Serjeant; I., Smail; J., Stevens; M., Vaccari. - In: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. - ISSN 0035-8711. - STAMPA. - 384:(2008), pp. 1597-1610. [10.1111/j.1365-2966.2007.12808.x]
The SCUBA HAlf Degree Extragalactic Survey (SHADES) VI. 350 $mu$m mapping of submillimetre galaxies
BATTISTELLI, Elia Stefano;
2008
Abstract
A follow-up survey using the Submillimetre High-Angular Resolution Camera (SHARC-II) at 350 μm has been carried out to map the regions around several 850-μm-selected sources from the Submillimetre HAlf Degree Extragalactic Survey (SHADES). These observations probe the infrared (IR) luminosities and hence star formation rates in the largest existing, most robust sample of submillimetre galaxies (SMGs).We measure 350-μm flux densities for 24 850-μm sources, seven of which are detected at ≥2.5σ within a 10 arcsec search radius of the 850-μm positions. When results from the literature are included the total number of 350-μmflux density constraints of SHADES SMGs is 31, with 15 detections.We fit a modified blackbody to the far-IR (FIR) photometry of each SMG, and confirm that typical SMGs are dust-rich (Mdust = 9 × 10^8Ms), luminous (LFIR = 2 × 10^12 Ls) star-forming galaxies with intrinsic dust temperatures of 35K and star formation rates of 400Myr−1. We have measured the temperature distribution of SMGs and find that the underlying distribution is slightly broader than implied by the error bars, and that most SMGs are at 28K with a few hotter. We also place new constraints on the 350-μm source counts, N350(>25 mJy) ∼ 200–500 deg−2.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
