Browsing by Title
Now showing items 17605-17624 of 24237
-
Probing gamma-ray burst environments with time variability: ULTRASPEC fast imaging of GRB 080210
(2011-04)We present high time resolution (1.09 s) photometry of GRB 080210 obtained with ULTRASPEC mounted on the ESO/3.6-m telescope, starting 68.22 min after the burst and lasting for 26.45 min. The light curve is smooth on both ... -
Probing gaseous halos of galaxies with radio jets
(2019-07-09)Context. Gaseous halos play a key role in understanding inflow, feedback, and the overall baryon budget in galaxies. Literature models predict transitions of the state of the gaseous halo between cold and hot accretion, ... -
Probing M subdwarf metallicity with an esdK5+esdM5.5 binary
(2015-10-15)We present a spectral analysis of the binary G 224-58 AB that consists of the coolest M extreme subdwarf (esdM5.5) and a brighter primary (esdK5). This binary may serve as a benchmark for metallicity measurement calibrations ... -
Probing quasar shutdown timescales with Hanny's Voorwerp
(American Institute of Physics (AIP), 2012)Galaxy formation is significantly modulated by energy output from supermassive black holes at the centers of galaxies which grow in highly efficient luminous quasar phases. The timescale on which black holes transition ... -
Probing the Dragonfish star-forming complex: : the ionizing population of the young massive cluster Mercer 30
(2016-05-01)The Dragonfish Nebula has been recently claimed to be powered by a superluminous but elusive OB association. Instead, systematic searches in near-infrared photometric surveys have found many other cluster candidates on ... -
Probing the feeding and feedback of AGN through molecular line maps
(2007)Current mm-interferometers can provide a complete view of the distribution and kinematics of molecular gas in the circumnu- clear disks of nearby galaxies. High-resolution CO maps are paramount in order to track down the ... -
Probing the initial conditions of high-mass star formation II : Fragmentation, stability, and chemistry towards high-mass star-forming regions G29.96-0.02 and G35.20-1.74
(2011)Most work on high-mass star formation has focused on observations of young massive stars in protoclusters. Very little is known about the preceding stage. Here, we present a new high-resolution study of pre-protocluster ... -
Probing the molecular interstellar medium of M82 with Herschel-SPIRE spectroscopy
(2010-07-01)We present the observations of the starburst galaxy M82 taken with the Herschel SPIRE Fourier-transform spectrometer. The spectrum (194–671 μm) shows a prominent CO rotational ladder from J = 4–3 to 13–12 emitted by the ... -
Probing the Multiphase Interstellar Medium in an Extreme Starburst at High Redshift
(2023-12-14)In this thesis we present a range of observations and results relating to the lensed hyperluminous sub-mm galaxy ‘9io9’ at z = 2.6, where we have used sub-mm/mm spectroscopy targeting the dense and cold interstellar ... -
Probing the nature of the low state in the extreme ultraluminous X-ray pulsar NGC 5907 ULX1
(2023-04-12)NGC 5907 ULX1 is the most luminous ultra-luminous X-ray pulsar (ULXP) known to date, reaching luminosities in excess of 1041 erg s-1. The pulsar is known for its fast spin-up during the on-state. Here, we present a long-term ... -
Probing the Production of Actinides under Different r-process Conditions
(2019-07-01)Several extremely metal-poor stars are known to have an enhanced thorium abundance. These actinide-boost stars have likely inherited material from an r-process that operated under different conditions than the r-process ... -
Probing the Role of AGN Feedback and Galactic Mergers in Galaxy Evolution
(2020-06-09)In this thesis we aim to probe the role of two of the processes that can dictate the evolution of galaxies – feedback from the central active galactic nucleus (AGN) and mergers. To study the importance of AGN feedback ... -
Probing the X-ray binary populations of the ring galaxy NGC 1291
(2012-04)We present Chandra studies of the X-ray binary (XRB) populations in the bulge and ring regions of the ring galaxy NGC 1291. We detect 169 X-ray point sources in the galaxy, 75 in the bulge and 71 in the ring, utilizing the ...