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Gas dynamics in tidal dwarf galaxies : disc formation at z=0
(2015-12)
Tidal dwarf galaxies (TDGs) are recycled objects that form within the collisional debris of interacting/merging galaxies. They are expected to be devoid of non-baryonic dark matter, since they can form only from dissipative ...
Highly perturbed molecular gas in infalling cluster galaxies : the case of CGCG97-079
(2015-10-11)
We report on CO (J = 2 → 1) mapping with the IRAM 30-m HEtrodyne Receiver Array (HERA) of CGCG 97-079, an irregular galaxy in the merging galaxy cluster Abell 1367 (z = 0.022). We find that ˜80 per cent of the detected CO ...
Variations in the Star Formation Efficiency of the Dense Molecular Gas across the Disks of Star-Forming Galaxies
(2015-10)
We present a new survey of HCN(1-0) emission, a tracer of dense molecular gas, focused on the little-explored regime of normal star-forming galaxy disks. Combining HCN, CO, and infrared (IR) emission, we investigate the ...
Dense cloud cores revealed by CO in the low metallicity dwarf galaxy WLM
(2015-09-10)
Understanding stellar birth requires observations of the clouds in which they form. These clouds are dense and self-gravitating, and in all existing observations they are molecular, with H2 the dominant species and carbon ...
A Warp in Progress : H I and Radio Continuum Observations of the Spiral NGC 3145
(2015-09)
We present VLA H I and 6 cm radio continuum observations of the spiral NGC 3145 and H I observations of its two companions, NGC 3143 and PGC 029578. In optical images NGC 3145 has stellar arms that appear to cross, forming ...
26Al kinematics: superbubbles following the spiral arms? : Constraints from the statistics of star clusters and HI supershells
(2015-06-12)
High energy resolution spectroscopy of the 1.8 MeV radioactive decay line of 26Al with the SPI instrument on board the INTEGRAL satellite has recently revealed that diffuse 26Al has large velocities in comparison to other ...
High-resolution mass models of dwarf galaxies from LITTLE THINGS
(2015-06)
We present high-resolution rotation curves and mass models of 26 dwarf galaxies from LITTLE THINGS. LITTLE THINGS is a high-resolution Very Large Array HI survey for nearby dwarf galaxies in the local volume within 11 Mpc. ...
SKA studies of nearby galaxies : star-formation, accretion processes and molecular gas across all environments
(2015-05-29)
The SKA will be a transformational instrument in the study of our local Universe. In particular, by virtue of its high sensitivity (both to point sources and diffuse low surface brightness emission), angular resolution and ...
The non-thermal superbubble in IC 10 : the generation of cosmic ray electrons caught in the act
(2015-02-01)
Superbubbles are crucial for stellar feedback, with supposedly high (of the order of 10 per cent) thermalization rates. We combined multiband radio continuum observations from the Very Large Array (VLA) with Effelsberg ...