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18 papers · 2 filters
Detection of a Noble Gas Molecular Ion, {36}ArH^+, in the Crab Nebula
M. J. Barlow, B. M. Swinyard, P. J. Owen +9
Noble gas molecules have not hitherto been detected in space. From spectra obtained with the Herschel Space Observatory, we report the detection of emission in the 617.5 GHz and 12…
Molecular gas in the centre of nearby galaxies from VLT/SINFONI integral field spectroscopy - II. Kinematics
X. Mazzalay, W. Maciejewski, P. Erwin +6
We present an analysis of the H2 emission-line gas kinematics in the inner < 4 arcsec radius of six nearby spiral galaxies, based on AO-assisted integral-field observations obtaine…
Europium production: neutron star mergers versus core-collapse supernovae
F. Matteucci, D. Romano, A. Arcones +2
We have explored the Eu production in the Milky Way by means of a very detailed chemical evolution model. In particular, we have assumed that Eu is formed in merging neutron star (…
Hydroxyl, water, ammonia, carbon monoxide and neutral carbon towards the Sgr A complex
Roland Karlsson, Aage Sandqvist, Åke Hjalmarson +4
We observed OH, HO, HN, CO, and C towards the +50 km/s cloud (M-0.02-0.07), the CND and the +20 km/s (M-0.13-0.08) cloud in the Sgr A complex with the VLA, Odin…
Bar pattern speed and position of the circumnuclear ring in NGC 1097
N. Piñol-Ferrer, K. Fathi, C. Carignan +4
We present the first galactic-scale model of the gas dynamics of the prototype barred Seyfert 1 galaxy NGC1097. We use large scale FaNTOmM Fabry-Perot interferometric data covering…
3D stellar kinematics at the Galactic center: measuring the nuclear star cluster spatial density profile, black hole mass, and distance
T. Do, G. D. Martinez, S. Yelda +6
We present 3D kinematic observations of stars within the central 0.5 pc of the Milky Way nuclear star cluster using adaptive optics imaging and spectroscopy from the Keck telescope…