209 citations · 4.8k across the 114 of their papers we have counts for
22 papers · 1 filter
Clear evidence for the early triggering of a luminous quasar-like AGN in a major, gas rich merger
Patricia S. Bessiere, Clive N. Tadhunter, Cristina Ramos Almeida +1
We present deep, intermediate resolution, long slit Gemini GMOS-S optical spectra of the SDSS type II quasar J002531-104022, which is a highly disturbed system currently undergoing…
Kinematics of Arp 270: gas flows, nuclear activity and two regimes of star formation
J. Zaragoza-Cardiel, J. Font-Serra, J. E. Beckman +7
We have observed the Arp 270 system (NGC 3395 & NGC 3396) in Hα emission using the GHαFaS Fabry-Perot spectrometer on the 4.2m William Herschel Telescope (La Palma). In NGC 3396, w…
Probing nuclear activity versus star formation at z~0.8 using near-infrared multi-object spectroscopy
Cristina Ramos Almeida, J. M. Rodriguez Espinosa, J. A. Acosta-Pulido +3
We present near-infrared (NIR) spectroscopic observations of 28 X-ray and mid-infrared selected sources at a median redshift of z~0.8 in the Extended Groth Strip (EGS). To date thi…
SAFIR: testing the coexistence of AGN and star formation activity and the nature of the dusty torus in the local universe
M. Sanchez-Portal, M. Castillo-Fraile, C. Ramos Almeida +16
We present the Seyfert and star formation Activity in the Far-InfraRed (SAFIR) project, a small (15.1h) Herschel guaranteed time proposal performing PACS and SPIRE imaging of a sma…
Constraining clumpy dusty torus models using optimized filter sets
A. Asensio Ramos, C. Ramos Almeida
Recent success in explaining several properties of the dusty torus around the central engine of active galactic nuclei has been gathered with the assumption of clumpiness. The prop…
PKS0347+05: a radio-loud/radio-quiet double AGN system triggered in a major galaxy merger
C. Tadhunter, C. Ramos Almeida, R. Morganti +4
We present optical, infrared and radio observations of the powerful FRII radio source PKS0347+05 (z=0.3390), and demonstrate that it is a rare example of a radio-loud/radio-quiet d…
The importance of galaxy interactions in triggering type II quasar activity
Patricia Bessiere, Clive N. Tadhunter, Cristina Ramos Almeida +1
We present deep Gemini GMOS-S optical broad-band images for a complete sample of 20 SDSS selected type II quasars with redshifts 0.3 < z < 0.41 and [OIII] emission line luminositie…
The starburst-AGN connection in the merger galaxy Mrk 938: an infrared and X-ray view
P. Esquej, A. Alonso-Herrero, A. M. Pérez-García +14
Mrk938 is a luminous infrared galaxy in the local Universe believed to be the remnant of a galaxy merger. It shows a Seyfert 2 nucleus and intense star formation according to optic…
Testing the AGN Unification Model in the Infrared
Cristina Ramos Almeida, N. A. Levenson, A. Alonso-Herrero +7
We present near-to-mid-infrared spectral energy distributions (SEDs) for 21 Seyfert galaxies, using subarcsecond resolution imaging data. Our aim is to compare the properties Seyfe…
Spitzer mid-IR spectroscopy of powerful 2Jy and 3CRR radio galaxies. I. Evidence against a strong starburst-AGN connection in radio-loud AGN
D. Dicken, C. Tadhunter, D. Axon +9
We present deep Spitzer/IRS spectra for complete samples of 46 2Jy radio galaxies (0.05<z<0.7) and 19 3CRR FRII radio galaxies (z<0.1), and use the detection of polycyclic aromatic…
PKS 1814-637: a powerful radio-loud AGN in a disk galaxy
R. Morganti, J. Holt, C. Tadhunter +5
We present a detailed study of PKS1814-637, a rare case of powerful radio source (P_5 GHz = 4.1 x 10^25 W/Hz) hosted by a disk galaxy. Optical images have been used to model the ho…
Are luminous radio-loud active galactic nuclei triggered by galaxy interactions?
C. Ramos Almeida, P. S. Bessiere, C. Tadhunter +6
We present the results of a comparison between the optical morphologies of a complete sample of 46 southern 2Jy radio galaxies at intermediate redshifts (0.05<z<0.7) and those of t…
Resolving the nuclear dust distribution of the Seyfert 2 galaxy NGC 3081
C. Ramos Almeida, M. Sanchez-Portal, A. M. Perez-Garcia +13
We report far-infrared (FIR) imaging of the Seyfert 2 galaxy NGC 3081 in the range 70-500 micron, obtained with an unprecedented angular resolution, using the Herschel Space Observ…
The forbidden high ionisation line region of the type 2 quasar Q1131+16: a clear view of the inner face of the torus?
Marvin Rose, Clive Tadhunter, Joanna Holt +2
We present spectroscopic observations of the type 2 quasar SDSS J11311.05+162739.5 (Q1131+16 hereafter; z=0.1732), which has the richest spectrum of forbidden high ionisation lines…
Testing the Unification Model for AGN in the Infrared: are the obscuring tori of Type 1 and 2 Seyferts different?
C. Ramos Almeida, N. A. Levenson, A. Alonso-Herrero +7
We present new mid-infrared (MIR) imaging data for three Type-1 Seyfert galaxies obtained with T-ReCS on the Gemini-South Telescope at subarcsecond resolution. Our aim is to enlarg…
Clear detection of dusty torus signatures in a Weak-Line Radio Galaxy: the case of PKS 0043-42
Cristina Ramos Almeida, Daniel Dicken, Clive Tadhunter +4
We report the clearest detection to date of dusty torus signatures in a Weak-Line Radio Galaxy (WLRG). The deep Spitzer InfraRed Spectrograph (IRS) rest-frame mid-infrared (MIR) sp…
Starburst radio galaxies: general properties, evolutionary histories and triggering
C. Tadhunter, J. Holt, R. Gonzalez Delgado +6
In this paper we discuss the results of a programme of spectral synthesis modelling of a sample of starburst radio galaxies in the context of scenarios for the triggering of the ac…
The optical morphologies of the 2Jy sample of radio galaxies: evidence for galaxy interactions
Cristina Ramos Almeida, Clive N. Tadhunter, K. J. Inskip +3
We present deep GMOS-S/Gemini optical broad-band images for a complete sample of 46 southern 2Jy radio galaxies at intermediate redshifts (0.05<z<0.7). The high-quality observation…
Extreme Starbursts in the Local Universe
R. M. Gonzalez Delgado, J. Rodriguez Zaurin, E. Perez +44
The "Extreme starbursts in the local universe" workshop was held at the Insituto de Astrofisica de Andalucia in Granada, Spain on 21-25 June 2010. Bearing in mind the advent of a n…
A near-IR study of the host galaxies of 2Jy radio sources at 0.03 < z < 0.5: I - the data
Katherine J. Inskip, Clive N. Tadhunter, Raffaella Morganti +3
We present the results of a program of K- and Ks-band imaging of a sample of 2Jy radio galaxies with redshifts 0.03 < z < 0.5, for which the host galaxy morphologies and structural…
The redshift and broad band spectral energy distribution of NRAO 150
J. A. Acosta-Pulido, I. Agudo, R. Barrena +3
Context. NRAO 150 is one of the brightest radio and mm AGN sources on the northern sky. It has been revealed as an interesting source where to study extreme relativistic jet phenom…
The Infrared Nuclear Emission of Seyfert Galaxies on Parsec Scales: Testing the Clumpy Torus models
Cristina Ramos Almeida, Nancy A. Levenson, Jose Miguel Rodriguez Espinosa +6
We present subarcsecond resolution mid-infrared (mid-IR) photometry in the wavelength range from 8 to 20 micron of eighteen Seyfert galaxies, reporting high spatial resolution nucl…