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Submillimetre galaxies reside in dark matter haloes with masses greater than 3 × 10 11 solar masses

Alexandre Amblard 1 Asantha Cooray 1, 2, * Paolo Serra 1 B. Altieri 3 V. Arumugam 4 H. Aussel 5 A. Blain 2 J. Bock 2, 6 A. Boselli 7 V. Buat 7 N. Castro-Rodríguez 8 A. Cava 8 P. Chanial 9 E. Chapin 10 D. L. Clements 9 A. Conley 11 L. Conversi 12 C. D. Dowell 6 E. Dwek 13 S. Eales 14 D. Elbaz 5 D. Farrah 15 A. Franceschini 16 W. Gear 14 J. Glenn 11 M. Griffin 14 M. Halpern 10 E. Hatziminaoglou 6 E. Ibar 17 K. Isaak 14 R. J. Ivison 17 A. A. Khostovan 1 Guilaine Lagache 18 L. Levenson 2 N. Lu 19 S. Madden 5 B. Maffei 20 G. Mainetti 16 L. Marchetti 16 G. Marsden 10 K. Mitchell-Wynne 1 H. T. Nguyen 21 B. O'Halloran 9 S. J. Oliver 15 A. Omont 22 M. J. Page 9 P. Panuzzo 5 A. Papageorgiou 6 C. P. Pearson 23 I. Pérez-Fournon 8 M. Pohlen 14 N. Rangwala 11 I. G. Roseboom 24 M. Rowan-Robinson 9 M. Sánchez Portal 3 B. Schulz 19 Douglas Scott 10 N. Seymour 25 D. L. Shupe 6 A. J. Smith 24 J. A. Stevens 26 M. Symeonidis 25 M. Trichas 9 K. Tugwell 27 M. Vaccari 16 E. Valiante 10 I. Valtchanov 3 J. D. Vieira 6 L. Vigroux 22 L. Wang 28 R. Ward 24 Gavin Wright 17 C. K. Xu 6 M. Zemcov 19
Abstract : The extragalactic background light at far-infrared wavelengths comes from optically faint, dusty, star-forming galaxies in the Universe with star formation rates of a few hundred solar masses per year. These faint, submillimetre galaxies are challenging to study individually because of the relatively poor spatial resolution of far-infrared telescopes. Instead, their average properties can be studied using statistics such as the angular power spectrum of the background intensity variations. A previous attempt at measuring this power spectrum resulted in the suggestion that the clustering amplitude is below the level computed with a simple ansatz based on a halo model. Here we report excess clustering over the linear prediction at arcminute angular scales in the power spectrum of brightness fluctuations at 250, 350 and 500 μm. From this excess, we find that submillimetre galaxies are located in dark matter haloes with a minimum mass, Mmin, such that log10[Mmin/M⊙] = at 350 μm, where M⊙ is the solar mass. This minimum dark matter halo mass corresponds to the most efficient mass scale for star formation in the Universe, and is lower than that predicted by semi-analytical models for galaxy formation
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Submitted on : Wednesday, November 13, 2013 - 3:29:28 PM
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Alexandre Amblard, Asantha Cooray, Paolo Serra, B. Altieri, V. Arumugam, et al.. Submillimetre galaxies reside in dark matter haloes with masses greater than 3 × 10 11 solar masses. Nature, Nature Publishing Group, 2011, 470 (7335), pp.510-512. ⟨10.1038/nature09771⟩. ⟨cea-00904021⟩

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