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Durham University

Department of Physics

Staff profile

Publication details for Professor Ian Smail

Walter, F., Decarli, R., Aravena, M., Carilli, C., Bouwens, R., da Cunha, E., Daddi, E., Ivison, R.J., Riechers, D., Smail, I., Swinbank, M., Weiss, A., Anguita, T., Assef, R., Bacon, R., Bauer, F., Bell, E.F., Bertoldi, F., Chapman, S., Colina, L., Cortes, P.C., Cox, P., Dickinson, M., Elbaz, D., Gónzalez-López, J., Ibar, E., Inami, H., Infante, L., Hodge, J., Karim, A., Le Fevre, O., Magnelli, B., Neri, R., Oesch, P., Ota, K., Popping, G., Rix, H.-W., Sargent, M., Sheth, K., van der Wel, A., van der Werf, P. & Wagg, J. (2016). ALMA Spectroscopic Survey in the Hubble Ultra Deep Field: Survey Description. The Astrophysical Journal 833(1): 67.

Author(s) from Durham


We present the rationale for and the observational description of ASPECS: The ALMA SPECtroscopic Survey in the Hubble Ultra-Deep Field (UDF), the cosmological deep field that has the deepest multi-wavelength data available. Our overarching goal is to obtain an unbiased census of molecular gas and dust continuum emission in high-redshift (z>0.5) galaxies. The ∼1′ region covered within the UDF was chosen to overlap with the deepest available imaging from HST. Our ALMA observations consist of full frequency scans in band 3 (84-115 GHz) and band 6 (212-272 GHz) at approximately uniform line sensitivity (L′CO∼2×109 K km/s pc2), and continuum noise levels of 3.8 μJy beam−1 and 12.7 μJy beam−1, respectively. The molecular surveys cover the different rotational transitions of the CO molecule, leading to essentially full redshift coverage. The [CII] emission line is also covered at redshifts 6.0