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7 papers
First Sagittarius A* Event Horizon Telescope Results. II. EHT and Multi-wavelength Observations, Data Processing, and Calibration
The Event Horizon Telescope Collaboration
We present Event Horizon Telescope (EHT) 1.3 mm measurements of the radio source located at the position of the supermassive black hole Sagittarius A* (Sgr A*), collected during th…
First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole
The Event Horizon Telescope Collaboration
When surrounded by a transparent emission region, black holes are expected to reveal a dark shadow caused by gravitational light bending and photon capture at the event horizon. To…
Excitation Mechanisms for HCN (1-0) and HCO+ (1-0) in Galaxies from the Great Observatories All-sky LIRG Survey
G. C. Privon, R. Herrero-Illana, A. S. Evans +18
We present new IRAM 30m spectroscopic observations of the GHz band, including emission from the CCH (n=1-0) multiplet, HCN (1-0), HCO+ (1-0), and HNC (1-0), for a sample o…
The nature of supernovae 2010O and 2010P in Arp 299 - II. Radio emission
C. Romero-Cañizales, R. Herrero-Illana, M. A. Pérez-Torres +8
We report radio observations of two stripped-envelope supernovae (SNe), 2010O and 2010P, which exploded within a few days of each other in the luminous infrared galaxy Arp 299. Whi…
The nature of supernovae 2010O and 2010P in Arp 299 - I. Near-infrared and optical evolution
E. Kankare, S. Mattila, S. Ryder +10
We present near-infrared and optical photometry, plus optical spectroscopy of two stripped-envelope supernovae (SNe) 2010O and 2010P that exploded in two different components of an…
Evidence of nuclear disks in starburst galaxies from their radial distribution of supernovae
R. Herrero-Illana, M. A. Pérez-Torres, A. Alberdi
Galaxy-galaxy interactions are expected to be responsible for triggering massive star formation and possibly accretion onto a supermassive black hole, by providing large amounts of…
The nuclear starburst in Arp 299-A: From the 5.0 GHz VLBI radio light-curves to its core-collapse supernova rate
M. Bondi, M. A. Perez-Torres, R. Herrero-Illana +1
The nuclear region of the Luminous Infra-red Galaxy Arp 299-A hosts a recent ( Myr), intense burst of massive star formation which is expected to lead to numerous core-c…