The most distant, luminous, dusty star-forming galaxies: Redshifts from NOEMA and ALMA spectral scans

Y. Fudamoto*, R. J. Ivison, I. Oteo, M. Krips, Z. Y. Zhang, A. Weiss, H. Dannerbauer, A. Omont, S. C. Chapman, L. Christensen, V. Arumugam, F. Bertoldi, M. Bremer, D. L. Clements, L. Dunne, S. A. Eales, J. Greenslade, S. Maddox, P. Martinez-Navajas, M. MichalowskiI. Pérez-Fournon, D. Riechers, J. M. Simpson, B. Stalder, E. Valiante, P. van der Werf

*この研究の対応する著者

研究成果: Article査読

38 被引用数 (Scopus)

抄録

We present 1.3-and/or 3-mm continuum images and 3-mm spectral scans, obtained using Northern Extended Millimeter Array (NOEMA) and Atacama Large Millimeter Array (ALMA), of 21 distant, dusty, star-forming galaxies. Our sample is a subset of the galaxies selected by Ivison et al. on the basis of their extremely red far-infrared (far-IR) colours and low Herschel flux densities; most are thus expected to be unlensed, extraordinarily luminous starbursts at z ≳ 4, modulo the considerable cross-section to gravitational lensing implied by their redshift. We observed 17 of these galaxies with NOEMA and four with ALMA, scanning through the 3-mm atmospheric window. We have obtained secure redshifts for seven galaxies via detection of multiple CO lines, one of them a lensed system at z = 6.027 (two others are also found to be lensed); a single emission line was detected in another four galaxies, one of which has been shown elsewhere to lie at z = 4.002. Where we find no spectroscopic redshifts, the galaxies are generally less luminous by 0.3-0.4 dex, which goes some way to explaining our failure to detect line emission. We show that this sample contains the most luminous known star-forming galaxies. Due to their extreme star-formation activity, these galaxies will consume their molecular gas in ≲ 100 Myr, despite their high molecular gas masses, and are therefore plausible progenitors of the massive, 'red-and-dead' elliptical galaxies at z≈ 3.

本文言語English
ページ(範囲)2028-2041
ページ数14
ジャーナルMonthly Notices of the Royal Astronomical Society
472
2
DOI
出版ステータスPublished - 2017 12月
外部発表はい

ASJC Scopus subject areas

  • 天文学と天体物理学
  • 宇宙惑星科学

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