Zobrazeno 1 - 6
of 6
pro vyhledávání: '"Lawther, Daniel"'
Autor:
Lawther, Daniel, Vestergaard, Marianne, Raimundo, Sandra, Koay, Jun Yi, Peterson, Bradley M, Fan, Xiaohui, Grupe, Dirk, Mathur, Smita
Mrk 590 is a known changing-look AGN which almost turned off in 2012, and then in 2017 partially re-ignited into a repeat flaring state, unusual for an AGN. Our \emph{Swift} observations since 2013 allow us to characterise the accretion-generated emi
Externí odkaz:
http://arxiv.org/abs/2211.14371
Disk reverberation mapping of a handful of nearby AGN suggest accretion disk sizes which are a factor few too large for their luminosities, apparently at odds with the standard model. Here, we investigate the likely contribution to the measured delay
Externí odkaz:
http://arxiv.org/abs/1808.04798
We study the host galaxies of four Iron Low-Ionization Broad Absorption-line Quasars (FeLoBALs) using Hubble Space Telescope imaging data, investigating the possibility that they represent a transition between an obscured AGN and an ordinary optical
Externí odkaz:
http://arxiv.org/abs/1712.04403
We present the Swift optical to X-ray spectral energy distributions (SEDs) of 44 quasars at redshifts z~2 observed by Swift, part of a larger program to establish and characterize the optical through X-ray SEDs of moderate-redshift quasars. Here we o
Externí odkaz:
http://arxiv.org/abs/1702.05444
Autor:
Lawther, Daniel, Paarup, Troels, Schmidt, Morten, Vestergaard, Marianne, Hjorth, Jens, Malesani, Daniele
Publikováno v:
2012A&A...546A..67L
Context: A significantly higher incidence of strong (rest equivalent width W_r > 1 {\AA}) intervening Mg II absorption is observed along gamma-ray burst (GRB) sight-lines relative to those of quasar sight-lines. A geometrical explanation for this dis
Externí odkaz:
http://arxiv.org/abs/1211.4777
Publikováno v:
University of Copenhagen
NASA Astrophysics Data System
NASA Astrophysics Data System
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::ac22182458f86a94e475cd26150fa9a4
https://curis.ku.dk/portal/en/publications/iron-lowionization-broad-absorption-line-quasars--the-missing-link-in-galaxy-evolution(6526b641-710d-4036-9255-fee803057869).html
https://curis.ku.dk/portal/en/publications/iron-lowionization-broad-absorption-line-quasars--the-missing-link-in-galaxy-evolution(6526b641-710d-4036-9255-fee803057869).html