Publications (35)
Double, double, toil, and trouble: The tails, bubbles, and knots of the local compact obscured nucleus galaxy NGC4418
C. F. Wethers, S. Aalto, G. C. Privon +20
Compact obscured nuclei (CONs) are an extremely obscured (N >10 cm) class of galaxy nuclei thought to exist in 20-40 per cent of nearby (ultra-)luminous infrar…
Constraints on the progenitor system and the environs of SN 2014J from deep radio observations
M. A. Perez-Torres, P. Lundqvist, R. Beswick +11
We report deep EVN and eMERLIN observations of the Type Ia SN 2014J in the nearby galaxy M 82. Our observations represent, together with JVLA observations of SNe 2011fe and 2014J,…
Hanny's Voorwerp: Evidence of AGN activity and a nuclear starburst in the central regions of IC 2497
H. Rampadarath, M. A. Garrett, G. I. G. Józsa +7
We present high- and intermediate resolution radio observations of the central region in the spiral galaxy IC 2497, performed using the European VLBI Network (EVN) at 18 cm, and th…
Subarcsecond international LOFAR radio images of Arp 220 at 150 MHz: A kpc-scale star forming disk surrounding nuclei with shocked outflows
E. Varenius, J. E. Conway, I. MartÃ-Vidal +16
We analyse new observations with the International Low Frequency Array (LOFAR) telescope, and archival data from the Multi-Element Radio Linked Interferometer Network (MERLIN) and…
The hidden heart of the luminous infrared galaxy IC 860 I. A molecular inflow feeding opaque, extreme nuclear activity
S. Aalto, S. Muller, S. König +19
High-resolution (0."03 - 0."09) (9 - 26 pc)) ALMA (100 - 350 GHz (3 - 0.8 mm)) and VLA 45 GHz measurements have been used to image continuum and spectral line emission from the inn…
A high-resolution mm and cm study of the obscured LIRG NGC 4418 - A compact obscured nucleus fed by in-falling gas?
F. Costagliola, S. Aalto, K. Sakamoto +4
The aim of this study is to constrain the dynamics, structure and feeding of the compact nucleous of NGC4418, and to reveal the nature of the main hidden power source: starburst or…
Using VO tools to investigate distant radio starbursts hosting obscured AGN in the HDF(N) region
A. M. S. Richards, T. W. B. Muxlow, R. Beswick +17
A 10-arcmin field around the HDF(N) contains 92 radio sources >40 uJy, resolved by MERLIN+VLA at 0".2-2".0 resolution. 55 have Chandra X-ray counterparts including 18 with a hard X…
Goonhilly: a new site for e-MERLIN and the EVN
H. -R. Kloeckner, S. Rawlings, I. Heywood +8
The benefits for the e-MERLIN and EVN arrays of using antennae at the satellite communication station at Goonhilly in Cornwall are discussed. The location of this site - new to ast…
Compact radio emission indicates a structured jet was produced by a binary neutron star merger
G. Ghirlanda, O. S. Salafia, Z. Paragi +33
The binary neutron star merger event GW170817 was detected through both electromagnetic radiation and gravitational waves. Its afterglow emission may have been produced by either a…
The Red Radio Ring: a gravitationally lensed hyperluminous infrared radio galaxy at z=2.553 discovered through citizen science
J. E. Geach, A. More, A. Verma +49
We report the discovery of a gravitationally lensed hyperluminous infrared galaxy (L_IR~10^13 L_sun) with strong radio emission (L_1.4GHz~10^25 W/Hz) at z=2.553. The source was ide…
An extremely powerful long-lived superluminal ejection from the black hole MAXI J1820+070
J. S. Bright, R. P. Fender, S. E. Motta +25
Black holes in binary systems execute patterns of outburst activity where two characteristic X-ray states are associated with different behaviours observed at radio wavelengths. Th…
An Overview of the MHONGOOSE Survey: Observing Nearby Galaxies with MeerKAT
W. J. G. de Blok, E. A. K. Adams, P. Amram +65
MHONGOOSE is a deep survey of the neutral hydrogen distribution in a representative sample of 30 nearby disk and dwarf galaxies with HI masses from 10^6 to ~10^{11} M_sun, and lumi…
High-resolution CO and radio imaging of z~2 ULIRGs: extended CO structures, and implications for the universal star formation law
M. S. Bothwell, S. C. Chapman, L. Tacconi +14
We present high spatial resolution (0.4", ~3.5 kpc) PdBI interferometric data on three ultra-luminous infrared galaxies (ULIRGs) at z~2: two submillimetre galaxies and one submilli…
A MeerKAT, e-MERLIN, H.E.S.S. and Swift search for persistent and transient emission associated with three localised FRBs
James O. Chibueze, M. Caleb, L. Spitler +156
We report on a search for persistent radio emission from the one-off Fast Radio Burst (FRB) 20190714A, as well as from two repeating FRBs, 20190711A and 20171019A, using the MeerKA…
Multi-Epoch Radio Imaging of gamma-ray Nova V959 Mon
F. Healy, T. J. O Brien, R. Beswick +2
V959 Mon (Nova Mon 2012) was first detected by the Fermi Large Area Telescope in June 2012, as a transient gamma-ray source. Subsequent optical observations showed that this gamma-…
Expanding e-MERLIN with the Goonhilly Earth Station
I. Heywood, H-R. Kloeckner, R. Beswick +7
A consortium of universities has recently been formed with the goal of using the decommissioned telecommunications infrastructure at the Goonhilly Earth Station in Cornwall, UK, fo…
Observations of the neutral gas and dust in the radio galaxy 3C305
N. Jackson, R. Beswick, A. Pedlar +4
We present MERLIN and Hubble Space Telescope (HST) observations of the central region of the nearby radio galaxy 3C305 and use them to study the gas and dust in this object. The ME…
Radio light curve of the galaxy possibly associated with FRB150418
S. Johnston, E. F. Keane, S. Bhandari +13
We present observations made with the Australia Telescope Compact Array (ATCA), the Jansky Very Large Array (JVLA) and the Giant Metre-Wave Telescope of the radio source within the…
Near-infrared spectra of Seyfert galaxies and line production mechanisms
N. Jackson, R. Beswick
New observations are reported of J-band spectra (1.04micron -- 1.4 micron) of three Seyfert 2 galaxies, Mkn 34, Mkn 78 and NGC 5929. In each case the spectral range includes the ne…
Panning for gold, but finding helium: discovery of the ultra-stripped supernova SN2019wxt from gravitational-wave follow-up observations
I. Agudo, L. Amati, T. An +96
We present the results from multi-wavelength observations of a transient discovered during the follow-up of S191213g, a gravitational wave (GW) event reported by the LIGO-Virgo Col…
Subarcsecond international LOFAR radio images of the M82 nucleus at 118 MHz and 154 MHz
E. Varenius, J. E. Conway, I. MartÃ-Vidal +25
The nuclear starburst in the nearby galaxy M82 provides an excellent laboratory for understanding the physics of star formation. This galaxy has been extensively observed in the pa…
Nearby galaxies in LoTSS-DR2: insights into the non-linearity of the radio-SFR relation
V. Heesen, M. Staffehl, A. Basu +24
Context. Cosmic rays and magnetic fields are key ingredients in galaxy evolution, regulating both stellar feedback and star formation. Their properties can be studied with low-freq…
The radio lightcurve of SN 2008iz in M82 revealed by Urumqi observations
N. Marchili, I. Marti-Vidal, A. Brunthaler +7
We report on a set of 5 GHz Urumqi observations of the galaxy M82, made between August 2005 and May 2009. From the resulting flux densities, we detect a strong flare, starting in M…
The MeerKAT Absorption Line Survey (MALS)
N. Gupta, R. Srianand, W. Baan +41
Deep galaxy surveys have revealed that the global star formation rate (SFR) density in the Universe peaks at 1 < z < 2 and sharply declines towards z = 0. But a clear picture of th…
Hanny's Voorwerp: a nuclear starburst in IC2497
M. A. Garrett, H. Rampadarath, G. I. G. Jozsa +7
We present high and intermediate resolution radio observations of the central region in the spiral galaxy IC 2497, performed using the European VLBI Network (EVN) at 18 cm, and the…
Star Formation and Accretion in Nearby Galaxies
J. Moldon, A. Alberdi, M. Perez-Torres +11
The appearance of galaxies is strongly dominated by two physical phenomena: star formation and accretion of material onto compact objects, primarily supermassive black holes. Nearb…
The PARADIGM Project I: A Multiscale radio morphological analysis of local U/LIRGS
G. Lucatelli, R. Beswick, J. Moldon +12
Disentangling the radio flux contribution from star formation (SF) and active-galactic-nuclei (AGN) activity is a long-standing problem in extragalactic astronomy, since at frequen…
Wide-field global VLBI and MERLIN combined monitoring of supernova remnants in M82
D. Fenech, R. Beswick, T. W. B. Muxlow +2
From a combination of MERLIN (Multi-Element Radio-Linked Interferometer Network) and global VLBI (Very Long Baseline Interferometry) observations of the starburst galaxy M82, image…
M87 at metre wavelengths: the LOFAR picture
F. de Gasperin, E. Orru', M. Murgia +92
M87 is a giant elliptical galaxy located in the centre of the Virgo cluster, which harbours a supermassive black hole of mass 6.4x10^9 M_sun, whose activity is responsible for the…
The MeerKAT International GHz Tiered Extragalactic Exploration (MIGHTEE) Survey
Matt J. Jarvis, A. R. Taylor, I. Agudo +54
The MIGHTEE large survey project will survey four of the most well-studied extragalactic deep fields, totalling 20 square degrees to Jy sensitivity at Giga-Hertz frequencies, a…
Optical and radio astrometry of the galaxy associated with FRB150418
C. G. Bassa, R. Beswick, S. J. Tingay +10
A fading radio source, coincident in time and position with the fast radio burst FRB150418, has been associated with the galaxy WISE J071634.59-190039.2. Subsequent observations of…
The radio core structure of the luminous infrared galaxy NGC 4418
E. Varenius, J. E. Conway, I. MartÃ-Vidal +4
The galaxy NGC 4418 contains one of the most compact obscured nuclei within a luminous infrared galaxy (LIRG) in the nearby Universe. This nucleus contains a rich molecular gas env…
Star-formation in the central kpc of the starburst/LINER galaxy NGC1614
E. Olsson, S. Aalto, M. Thomasson +1
A high angular resolution, multi-wavelength study of the LINER galaxy NGC1614 has been carried out. OVRO CO 1-0 observations are presented together with extensive multi-frequency r…
Double radio peak and non-thermal collimated ejecta in RS Ophiuchi following the 2006 outburst
S. P. S. Eyres, T. J. O'Brien, R. Beswick +12
We report MERLIN, VLA, OCRA-p, VLBA, Effelsberg and GMRT observations beginning 4.5 days after the discovery of RS Ophiuchi undergoing its 2006 recurrent nova outburst. Observation…
13CO 1-0 imaging of the Medusa merger, NGC4194
S. Aalto, R. Beswick, E. Jütte
Studying molecular gas properties in merging galaxies gives important clues to the onset and evolution of interaction-triggered starbursts. The CO/13CO 1-0 line intensity ratio can…