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The role of major mergers in the size growth of intermediate-mass spheroids
(2014-09-11)
We study of the role of ‘major’ mergers (mass ratios >1: 4) in driving size growth in high-redshift (1 < z < 2) spheroidal galaxies (SGs) with stellar masses between 109.5 and 1010.7 M⊙. This is a largely unexplored mass ...
Light, Alpha, and Fe-Peak Element Abundances in the Galactic Bulge
(2014-09-09)
We present radial velocities and chemical abundances of O, Na, Mg, Al, Si, Ca, Cr, Fe, Co, Ni, and Cu for a sample of 156 red giant branch stars in two Galactic bulge fields centered near (l,b)=(+5.25,-3.02) and (0,-12). ...
Detection of molecular gas in an ALMA [CII]-identified Submillimetre Galaxy at z = 4.44
(2014-09-01)
We present the detection of 12CO(2–1) in the z = 4.44 submillimetre galaxy ALESS65.1 using the Australia Telescope Compact Array. A previous Atacama Large Millimeter/submillimeter Array study of submillimetre galaxies ...
Deep NIR photometry of HI galaxies in the Zone of Avoidance
(2014-09-01)
Current studies of the peculiar velocity flow field in the Local Universe are limited by either the lack of detection or accurate photometry for galaxies at low Galactic latitudes. The contribution to the dynamics of the ...
Some like it cold: molecular emission and effective dust temperatures of dense cores in the Pipe Nebula
(2014-08-08)
Aims. The Pipe Nebula is characterized by a low star-formation rate and is therefore an ideal environment to explore how initial conditions, including core characteristics, affect star-formation efficiencies. Methods. In ...
The importance of minor-merger-driven star formation and black-hole growth in disk galaxies
(2014-06-01)
We use the SDSS Stripe 82 to empirically quantify the stellar-mass and black-hole growth triggered by minor mergers in local spiral (disk) galaxies. Since major mergers destroy disks and create spheroids, morphologically ...
The spectral structure and energetics of powerful radio sources
(2014-04-29)
Determining the energy spectrum of an electron population can give key insights into the underlying physics of a radio source; however, the lack of high resolution, broad-bandwidth observations has left many ambiguities ...
Stromgren photometric survey in the Galactic anticenter direction
(2012-11-16)
Aims. The main purpose is to map the radial variation of the stellar space density for the young stellar population in the Galactic anticenter direction in order to understand the structure and location of the Perseus ...
Elemental and isotopic abundances and chemical evolution of galaxies
(Astronomical Society of the Pacific, 2012-02-15)
Elemental and isotopic abundances are the fossils of galactic archaeology. The observed [X/Fe]-[Fe/H] relations in the Galactic bulge and disk and the mass-metallicity relation of galaxies are roughly reproduced with ...