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

Amblard, Alexandre, Cooray, Asantha, Serra, Paolo, Altieri, B., Arumugam, V., Aussel, H., Blain, A., Bock, J., Boselli, A., Buat, V., Castro-Rodríguez, N., Cava, A., Chanial, P., Chapin, E., Clements, D. L., Conley, A., Conversi, L., Dowell, C. D., Dwek, E., Eales, Stephen Anthony, Elbaz, D., Farrah, D., Franceschini, A., Gear, Walter Kieran, Glenn, J., Griffin, Matthew Joseph, Halpern, M., Hatziminaoglou, E., Ibar, E., Isaak, Kate Gudrun, Ivison, R. J., Khostovan, A. A., Lagache, G., Levenson, L., Lu, N., Madden, S., Maffei, B., Mainetti, G., Marchetti, L., Marsden, G., Mitchell-Wynne, K., Nguyen, H. T., O'Halloran, B., Oliver, S. J., Omont, A., Page, M. J., Panuzzo, P., Papageorgiou, Andreas, Pearson, C. P., Pérez-Fournon, I., Pohlen, Michael, Rangwala, N., Roseboom, I. G., Rowan-Robinson, M., Portal, M. Sánchez, Schulz, B., Scott, Douglas, Seymour, N., Shupe, D. L., Smith, A. J., Stevens, J. A., Symeonidis, M., Trichas, M., Tugwell, K., Vaccari, M., Valiante, Elisabetta, Valtchanov, I., Vieira, J. D., Vigroux, L., Wang, L., Ward, R., Wright, G., Xu, C. K. and Zemcov, M. 2011. Submillimetre galaxies reside in dark matter haloes with masses greater than 3×10 (11) solar masses. Nature 470 (7335) , pp. 510-512. 10.1038/nature09771

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Abstract

The extragalactic background light at far-infrared wavelengths1, 2, 3 comes from optically faint, dusty, star-forming galaxies in the Universe with star formation rates of a few hundred solar masses per year4. These faint, submillimetre galaxies are challenging to study individually because of the relatively poor spatial resolution of far-infrared telescopes5, 6. Instead, their average properties can be studied using statistics such as the angular power spectrum of the background intensity variations7, 8, 9, 10. A previous attempt11 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 model12. 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 Universe13, and is lower than that predicted by semi-analytical models for galaxy formation14.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Publisher: Nature Publising Group
ISSN: 0028-0836
Last Modified: 04 Jun 2017 02:13
URI: http://orca-mwe.cf.ac.uk/id/eprint/10952

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