Time Delay of MgII Emission Response for the Luminous Quasar HE 0435-4312: Towards Application of High-Accretor Radius-Luminosity Relation in Cosmology

no code implementations • 22 Dec 2020 • Michal Zajaček, Bożena Czerny, Mary Loli Martinez-Aldama, Mateusz Rałowski, Aleksandra Olejak, Robert Przyłuski, Swayamtrupta Panda, Krzysztof Hryniewicz, Marzena Śniegowska, Mohammad-Hassan Naddaf, Raj Prince, Wojtek Pych, Grzegorz Pietrzyński, C. Sobrino Figaredo, Martin Haas, Justyna Średzińska, Magdalena Krupa, Agnieszka Kurcz, Andrzej Udalski, Vladimír Karas, Marek Sarna, Hannah L. Worters, Ramotholo R. Sefako, Anja Genade

Using the six years of the spectroscopic monitoring of the luminous quasar HE 0435-4312 ($z=1. 2231$) with the Southern African Large Telescope (SALT), in combination with the photometric data (CATALINA, OGLE, SALTICAM, and BMT), we determined the rest-frame time-delay of $296^{+13}_{-14}$ days between the MgII broad-line emission and the ionizing continuum using seven different time-delay inference methods.

Astrophysics of Galaxies

Clustering of red and blue galaxies around high-redshift 3C radio sources as seen by the Hubble Space Telescope

no code implementations • 13 Oct 2020 • Zohreh Ghaffari, Martin Haas, Marco Chiaberge, S. P. Willner, Rolf Chini, Hendrik Hildebrandt, Michael West, Roberto de Propris

To properly understand the evolution of high-redshift galaxy clusters, both passive and star-forming galaxies have to be considered.

Astrophysics of Galaxies