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59 papers · 1 filter
Multi-wavelength properties of Spitzer-selected starbursts at z~2
N. Fiolet, A. Omont, M. Polletta +17
A complete sample of 33 sources believed to be starbursts ("5.8micron-peakers") was selected in the (0.5 sq. deg.) J1046+56 field with selection criteria F_(24micron)>400muJy, the…
Kinematic and Structural Evolution of Field and Cluster Spiral Galaxies
Bodo L. Ziegler, Elif Kutdemir, Cristiano Da Rocha +3
To understand the processes that build up galaxies we investigate the stellar structure and gas kinematics of spiral and irregular galaxies out to redshift 1. We target 92 galaxies…
Testing an unifying view of Gamma Ray Burst afterglows
M. Nardini, G. Ghisellini, G. Ghirlanda +1
Four years after the launch the Swift satellite the nature of the Gamma Ray Bursts (GRBs) broadband afterglow behaviour is still an open issue ad the standard external shock fireba…
Warm Molecular Hydrogen in the Galactic Wind of M82
S. Veilleux, D. S. N. Rupke, R. Swaters
We report the detection of a complex of extraplanar warm H_2 knots and filaments extending more than ~3 kpc above and below the galactic plane of M82, roughly coincident with the w…
Variable Sodium Absorption in a Low-Extinction Type Ia Supernova
Joshua D. Simon, Avishay Gal-Yam, Orly Gnat +18
Recent observations have revealed that some Type Ia supernovae exhibit narrow, time-variable Na I D absorption features. The origin of the absorbing material is controversial, but…
Eddington ratio governs the equivalent width of MgII emission line in active galactic nuclei
Xiao-Bo Dong, Ting-Gui Wang, Jian-Guo Wang +4
We have investigated the ensemble regularities of the equivalent widths (EWs) of MgII 2800 emission line of active galactic nuclei (AGNs), using a uniformly selected sample of 2092…