Galaxy formation and evolution

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SDSS-IV MaNGA: variation of the stellar initial mass function in spiral and early-type galaxies

(2017)

Authors:

Hongyu Li, Junqiang Ge, Shude Mao, Michele Cappellari, RJ Long, Ran Li, Eric Emsellem, Aaron A Dutton, Cheng Li, Kevin Bundy, Daniel Thomas, Niv Drory, Alexandre Roman Lopes
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H0LiCOW – V. New COSMOGRAIL time delays of HE 0435−1223: H0 to 3.8 per cent precision from strong lensing in a flat ΛCDM model

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 465:4 (2017) 4914-4930

Authors:

V Bonvin, F Courbin, SH Suyu, PJ Marshall, CE Rusu, D Sluse, M Tewes, KC Wong, T Collett, CD Fassnacht, T Treu, MW Auger, S Hilbert, LVE Koopmans, G Meylan, N Rumbaugh, A Sonnenfeld, C Spiniello
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The discovery of gas-rich, dusty starbursts in luminous reddened quasars at z ∼ 2.5 with ALMA

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 465:4 (2017) 4390-4405

Authors:

M Banerji, CL Carilli, G Jones, J Wagg, RG McMahon, PC Hewett, S Alaghband-Zadeh, C Feruglio
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A High Space Density of Luminous Ly alpha Emitters at z similar to 6.5

ASTROPHYSICAL JOURNAL 837:1 (2017) ARTN 11

Authors:

Micaela B Bagley, Claudia Scarlata, Alaina Henry, Marc Rafelski, Matthew Malkan, Harry Teplitz, Y Sophia Dai, Ivano Baronchelli, James Colbert, Michael Rutkowski, Vihang Mehta, Alan Dressler, Patrick McCarthy, Andrew Bunker, Hakim Atek, Thibault Garel, Crystal L Martin, Nimish Hathi, Brian Siana
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In and out star formation in z ~ 1.5 quiescent galaxies from rest-frame UV spectroscopy and the far-infrared

Astronomy & Astrophysics EDP Sciences 599 (2017) A95

Authors:

Raphael Gobat, Emanuele Daddi, Veronica Strazzullo, Bianca Garilli, Marco Mignoli, Z Ma, S Jin, Claudia Maraston, Georgios Magdis, Matthieu Béthermin, Michele Cappellari, Marcella Carollo, Andrea Cimatti, Chiara Feruglio, Michele Moresco, M Onodera, Lucia Pozzetti, Alvio Renzini, Mark Sargent, Fabrice Valentino, Anita Zanella

Abstract:

We present a sample of 34 spectroscopically confirmed BzK-selected 1011 M quiescent galaxies (pBzK) in the COSMOS field. The targets were initially observed with VIMOS on the VLT to facilitate the calibration of the photometric redshifts of massive galaxies at z and 1:5. Here we describe the reduction and analysis of the data, and the spectrophotometric properties of these pBzK galaxies. In particular, using a spatially resolved median 2D spectrum, we find that the fraction of stellar populations with ages <1 Gyr is at least 3 times higher in the outer regions of the pBzK galaxies than in their cores. This results in a mild age gradient of age 0:4 Gyr over 6 kpc and suggests either the occurrence of widespread rejuvenation episodes or that inside-out quenching played a role in the passivization of this galaxy population. We also report on low-level star formation rates derived from the [OII]3727 emission line, with SFROII 3:74:5 M yr1. This estimate is confirmed by an independent measurement on a separate sample of similarly-selected quiescent galaxies in the COSMOS field, using stacked far-infrared data (SFRFIR 24 M yr1). This second, photometric sample also displays significant excess at 1.4 GHz, suggestive of the presence of radio-mode AGN activity.
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