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5 papers · 2 filters
OH and H2O maser variations in W33B
P. Colom, E. E. Lekht, M. I. Pashchenko +1
The active star-forming region W33B is a source of OH and H2O maser emission located in distinct zones around the central object. The aim was to obtain the complete Stokes pattern…
Alignment of quasar polarizations with large-scale structures
Damien Hutsemékers, Lorraine Braibant, Vincent Pelgrims +1
We have measured the optical linear polarization of quasars belonging to Gpc-scale quasar groups at redshift z ~ 1.3. Out of 93 quasars observed, 19 are significantly polarized. We…
Microlensing of the broad-line region in the quadruply imaged quasar HE0435-1223
L. Braibant, D. Hutsemékers, D. Sluse +2
Using infrared spectra of the z = 1.693 quadruply lensed quasar HE0435-1223 acquired in 2009 with the spectrograph SINFONI at the ESO Very Large Telescope, we have detected a clear…
Discovery of a red quasar with recurrent activity
S. Nandi, R. Roy, D. J. Saikia +6
We report a new double-double radio quasar, DDRQ, J07464526 which exhibits two cycles of episodic activity. From radio continuum observations at 607 MHz using the GMRT and 1400…
Star formation rates in nearby Markarian galaxies
V. E. Karachentseva, O. V. Melnyk, I. D. Karachentsev
The star formation rates for the 230 nearest Markarian galaxies with radial velocities V_LG<3500 km/s have been determined from their far ultraviolet fluxes obtained with the GALEX…