Publications (14)
Limits on the Ejecta Mass During the Search for Kilonovae Associated with Neutron Star-Black Hole Mergers: A case study of S230518h, GW230529, S230627c and the Low-Significance Candidate S240422ed
M. Pillas, S. Antier, K. Ackley +78
Neutron star-black hole (NSBH) mergers, detectable via their gravitational-wave (GW) emission, are expected to produce kilonovae (KNe). Four NSBH candidates have been identified an…
Physical properties of 15 quasars at
C. Mazzucchelli, E. Bañados, B. P. Venemans +21
Quasars are galaxies hosting accreting supermassive black holes; due to their brightness, they are unique probes of the early universe. To date, only few quasars have been reported…
Discovery of eight z ~ 6 quasars from Pan-STARRS1
E. Bañados, B. P. Venemans, E. Morganson +24
High-redshift quasars are currently the only probes of the growth of supermassive black holes and potential tracers of structure evolution at early cosmic time. Here we present our…
Discovery of three z>6.5 quasars in the VISTA Kilo-degree Infrared Galaxy (VIKING) survey
B. P. Venemans, J. R. Findlay, W. J. Sutherland +6
Studying quasars at the highest redshifts can constrain models of galaxy and black hole formation, and it also probes the intergalactic medium in the early universe. Optical survey…
Digital Access to a Sky Century at Harvard. II: Initial Photometry and Astrometry
S. Laycock, S. Tang, J. Grindlay +3
Digital Access to a Sky Century @ Harvard (DASCH) is a project to digitize the collection of ~500,000 glass photographic plates held at Harvard College Observatory. The collection…
FUSE observations of the HeII Lyman alpha forest towards HS1700+6416
D. Reimers, C. Fechner, G. Kriss +5
We present FUSE observations of the HeII Lyman alpha forest in the redshift range 2.3 < z < 2.7 towards HS1700+6416. Between October 2002 and February 2003, the brightness of the Q…
The MUSE Ultra Deep Field (MUDF). I. Discovery of a group of Ly nebulae associated with a bright quasar pair
E. Lusso, M. Fumagalli, M. Fossati +17
We present first results from Multi Unit Spectroscopic Explorer (MUSE) observations at the Very Large Telescope in the MUSE Ultra Deep Field (MUDF), a arcmi…
Luhman 16AB: A Remarkable, Variable L/T Transition Binary 2 pc from the Sun
A. J. Burgasser, J. Faherty, Y. Beletsky +12
Luhman (2013) has reported the discovery of a brown dwarf binary system only 2.01+/-0.15 pc from the Sun. The binary is well-resolved with a projected separation of 1.5", and spect…
TOI-2084 b and TOI-4184 b: two new sub-Neptunes around M dwarf stars
K. Barkaoui, M. Timmermans, A. Soubkiou +67
We present the discovery and validation of two TESS exoplanets orbiting nearby M dwarfs: TOI-2084b, and TOI-4184b. We characterized the host stars by combining spectra from Shane/K…
The Pan-STARRS1 distant z>5.6 quasar survey: more than 100 quasars within the first Gyr of the universe
E. Bañados, B. P. Venemans, R. Decarli +33
Luminous quasars at z>5.6 can be studied in detail with the current generation of telescopes and provide us with unique information on the first gigayear of the universe. Thus far…
Accretion of a Terrestrial-Like Minor Planet by a White Dwarf
Carl Melis, J. Farihi, P. Dufour +5
We present optical and infrared characterization of the polluted DAZ white dwarf GALEX J193156.8+011745. Imaging and spectroscopy from the ultraviolet to the thermal infrared indic…
The identification of z-dropouts in Pan-STARRS1: three quasars at 6.5<z<6.7
B. P. Venemans, E. Bañados, R. Decarli +30
Luminous distant quasars are unique probes of the high redshift intergalactic medium (IGM) and of the growth of massive galaxies and black holes in the early universe. Absorption d…
A Massive, Cooling-Flow-Induced Starburst in the Core of a Highly Luminous Galaxy Cluster
M. McDonald, M. Bayliss, B. A. Benson +83
In the cores of some galaxy clusters the hot intracluster plasma is dense enough that it should cool radiatively in the cluster's lifetime, leading to continuous "cooling flows" of…
The UV spectrum of HS1700+6416 II. FUSE observations of the HeII Lyman alpha forest
C. Fechner, D. Reimers, G. A. Kriss +11
We present the far-UV spectrum of the quasar HS1700+6416 taken with FUSE. This QSO provides the second line of sight with the HeII absorption resolved into a Ly alpha forest struct…