Zobrazeno 1 - 10
of 132
pro vyhledávání: '"Floyd, David P"'
Autor:
Bate, Nicholas F., Vernardos, Georgios, O'Dowd, Matthew J., Neri-Larios, Daniel M., Webster, Rachel L., Floyd, David J. E., Barone-Nugent, Robert L., Labrie, Kathleen, King, Anthea L., Yong, Suk Yee
We present new HST WFPC3 imaging of four gravitationally lensed quasars: MG 0414+0534; RXJ 0911+0551; B 1422+231; WFI J2026-4536. In three of these systems we detect wavelength-dependent microlensing, which we use to place constraints on the sizes an
Externí odkaz:
http://arxiv.org/abs/1807.03553
We present the results of a Keck-ESI spectroscopic study of six dwarf elliptical (dE) galaxies in the Perseus Cluster core, and confirm two dwarfs as cluster members for the first time. All six dEs follow the size-magnitude relation for dE/dSph galax
Externí odkaz:
http://arxiv.org/abs/1407.2368
Autor:
Pradyumna Agasthi, Justin Z. Lee, Sai Harika Pujari, Andrew S. Tseng, Justin Shipman, Diana Almader‐Douglas, Hasan Ashraf, Farouk Mookadam, Floyd David Fortuin, Nirat Beohar, Reza Arsanjani, Siva Mulpuru
Publikováno v:
Journal of Arrhythmia, Vol 36, Iss 2, Pp 271-279 (2020)
Abstract Background Atrial fibrillation (AF) and coronary artery disease (CAD) are commonly associated. Cotreatment with multiple antithrombotic agents can increase the risk of bleeding. We sought to evaluate patient‐centered outcomes in patients w
Externí odkaz:
https://doaj.org/article/143a69d88867406b86877c9b15ebce10
We examine the hypothesis that mergers and close encounters between galaxies can fuel AGNs by increasing the rate at which gas accretes towards the central black hole. We compare the clustering of galaxies around radio-loud AGNs with the clustering a
Externí odkaz:
http://arxiv.org/abs/1305.2673
Autor:
Mould, Jeremy, Reynolds, Tristan, Readhead, Tony, Floyd, David, Jannuzi, Buell, Cotter, Garret, Ferrarese, Laura, Matthews, Keith, Atlee, David, Brown, Michael
In preparation for a study of their circumnuclear gas we have surveyed 60% of a complete sample of elliptical galaxies within 75 Mpc that are radiosources. Some 20% of our nuclear spectra have infrared emission lines, mostly Paschen lines, Brackett g
Externí odkaz:
http://arxiv.org/abs/1209.6101
Autor:
Penny, Samantha J., Pimbblet, Kevin A., Conselice, Christopher J., Brown, Michael J. I., Gruetzbauch, Ruth, Floyd, David J. E.
Using deep B band imaging down to mu_{B} = 26 mag arcsec^{-2}, we present evidence for tidal tails in the Antlia Dwarf galaxy, one of the most distant members of the Local Group. This elongation is in the direction of Antlia's nearest neighbor, the M
Externí odkaz:
http://arxiv.org/abs/1209.4179
Autor:
Floyd, David J. E., Dunlop, James S., Kukula, Marek J., Brown, Michael J. I., McLure, Ross J., Baum, Stefi A., O'Dea, Christopher P.
We present deep HST/WFPC2, rest-frame U images of 17 ~L* quasars at z=1 and z=2 (V and I bands respectively), designed to explore the host galaxies. We fit the images with simple axisymmetric galaxy models, including a point-source, in order to separ
Externí odkaz:
http://arxiv.org/abs/1208.4143
We demonstrate a new technique for determining the physical conditions of the broad line emitting gas in quasars, using near-infrared hydrogen emission lines. Unlike higher ionisation species, hydrogen is an efficient line emitter for a very wide ran
Externí odkaz:
http://arxiv.org/abs/1206.0721
Aims. The small-scale nature of spacetime can be tested with observations of distant quasars. We comment on a recent paper by Tamburini et al. (A&A, 533, 71) which claims that Hubble Space Telescope observations of the most distant quasars place seve
Externí odkaz:
http://arxiv.org/abs/1110.4986
We have measured the radio continuum emission of 396 early-type galaxies brighter than K = 9, using 1.4 GHz imagery from the NRAO VLA Sky Survey, Green Bank 300-ft Telescope and 64-m Parkes Radio Telescope. For M_K < -24 early-type galaxies, the dist
Externí odkaz:
http://arxiv.org/abs/1103.2828