Extremely Large Telescope: publications

Linear relation between HI circular velocity and stellar velocity dispersion in early-type galaxies, and slope of the density profiles

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 460:2 (2016) 1382-1389

Authors:

P Serra, T Oosterloo, M Cappellari, M den Heijer, GIG Jozsa

Linear relation between HI circular velocity and stellar velocity dispersion in early-type galaxies, and slope of the density profiles

(2016)

Authors:

Paolo Serra, Tom Oosterloo, Michele Cappellari, Milan den Heijer, Gyula IG Józsa

The Subaru FMOS galaxy redshift survey (FastSound). IV. New constraint on gravity theory from redshift space distortions at z similar to 1.4

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 68:3 (2016) ARTN 38

Authors:

T Okumura, C Hikage, T Totani, M Tonegawa, H Okada, K Glazebrook, C Blake, PG Ferreira, S More, A Taruya, S Tsujikawa, M Akiyama, G Dalton, T Goto, T Ishikawa, F Iwamuro, T Matsubara, T Nishimichi, K Ohta, I Shimizu, R Takahashi, N Takato, N Tamura, K Yabe, N Yoshida

Radial constraints on the initial mass function from TiO features and Wing-Ford band in early-type galaxies

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 457:2 (2016) 1468-1489

Authors:

F La Barbera, A Vazdekis, I Ferreras, A Pasquali, M Cappellari, I Martin-Navarro, F Schoenebeck, J Falcon-Barroso

The 3D Project - XXXI. Nuclear radio emission in nearby early-type galaxies

Monthly Notices of the Royal Astronomical Society 458:2 (2016) 2221-2268

Authors:

K Nyland, LM Young, JM Wrobel, M Sarzi, R Morganti, K Alatalo, L Blitz, F Bournaud, M Bureau, M Cappellari, AF Crocker, RL Davies, TA Davis, PT de Zeeuw, PA Duc, E Emsellem, S Khochfar, D Krajnović, H Kuntschner, RM McDermid, T Naab, T Oosterloo, N Scott, P Serra, AM Weijmans

Abstract:

We present the results of a high-resolution, 5 GHz, Karl G. Jansky Very Large Array study of the nuclear radio emission in a representative subset of the ATLAS^3D survey of early-type galaxies (ETGs). We find that 51 ± 4 per cent of the ETGs in our sample contain nuclear radio emission with luminosities as low as 10¹⁸ W Hz^-1. Most of the nuclear radio sources have compact (≲25-110 pc) morphologies, although ~10 per cent display multicomponent core+jet or extended jet/lobe structures. Based on the radio continuum properties, as well as optical emission line diagnostics and the nuclear X-ray properties, we conclude that the majority of the central 5 GHz sources detected in the ATLAS^3D galaxies are associated with the presence of an active galactic nucleus (AGN). However, even at subarcsecond spatial resolution, the nuclear radio emission in some cases appears to arise from low-level nuclear star formation rather than an AGN, particularly when molecular gas and a young central stellar population is present. This is in contrast to popular assumptions in the literature that the presence of a compact, unresolved, nuclear radio continuum source universally signifies the presence of an AGN. Additionally, we examine the relationships between the 5 GHz luminosity and various galaxy properties including the molecular gas mass and - for the first time - the global kinematic state. We discuss implications for the growth, triggering, and fuelling of radio AGNs, as well as AGN-driven feedback in the continued evolution of nearby ETGs.

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