Results 131 to 140 of about 482,777 (285)

Keck and Hubble Observations Show that MOA-2008-BLG-379Lb is a Super-Jupiter Orbiting an M Dwarf

The Astronomical Journal
We present high angular resolution imaging that detects the MOA-2008-BLG-379L exoplanet host star using Keck adaptive optics and the Hubble Space Telescope.
David P. Bennett, Aparna Bhattacharya, Jean-Philippe Beaulieu, Naoki Koshimoto, Joshua W. Blackman, Ian A. Bond, Clément Ranc, Natalia Rektsini, Sean K. Terry, Aikaterini Vandorou, Jessica R. Lu, Jean Baptiste Marquette, Greg Olmschenk, Daisuke Suzuki   +13 more
doaj   +1 more source

Experimental Study of PWM-Controlled Emission From a Large-Aperture VCSEL

IEEE Photonics Journal
This study demonstrates the use of pulse-width modulation (PWM) for mode selection in a large-aperture vertical-cavity surface-emitting laser (VCSEL). Experimental results reveal that driving the device with 1 kHz PWM pulses maintains a stable far-field ...
Miroslav Slouka, Dalibor Javurek, Erik Hendrych, Marcel Stofik, Martin Kutac, Jan Latal   +5 more
doaj   +1 more source

Five new very low mass binaries [PDF]

, 2006
We report the discovery of companions to 5 nearby late M dwarfs (>M5), LHS1901, LHS4009, LHS6167, LP869-26 and WT460, and we confirm that the recently discovered mid-T brown dwarf companion to SCR1845-6357 is physically bound to that star.
A.-M. Lagrange, Baraffe, Beuzit, Biller, C. Perrier, Chabrier, D. Mouillet, D. Ségransan, Deacon, Delfosse, Delfosse, Devillard, Duquennoy, E. Stadler, G. Chauvin, G. Montagnier, Halbwachs, Hambly, Hawley, Henry, J.-L. Beuzit, Jeffries, Knapp, Leggett, Leggett, M. Mayor, McCaughrean, P. Delorme, P. Gigan, Patterson, Reid, Reid, Rigaut, S. Udry, Salim, Scholz, Siegler, Skrutskie, T. Forveille, T. Fusco, Véran, Wroblewski, X. Delfosse   +42 more
core   +4 more sources

Impact of optical aberrations on axial position determination by photometry

Nature Methods, 2018
ImPhys/Imaging ...
Rasmus Ø. Thorsen, Christiaan N. Hulleman, Mathias Hammer, David Grünwald, Sjoerd Stallinga, Bernd Rieger   +5 more
openaire   +7 more sources

Accumulation of GSK‐3β in Interneurons Impairs Adult Hippocampal Neurogenesis by Inhibiting GABAergic Transmission

Aging Cell, EarlyView.
Overexpression of GSK‐3β in DG GABAergic neurons impairs neurogenesis by reducing GABA release, which can be reversed by enhancing GABAergic transmission. ABSTRACT The activation of glycogen synthase kinase 3β (GSK‐3β) and the deterioration of spatial memory represent prominent pathological and clinical manifestations of Alzheimer's disease (AD ...
Fei Liu, Jiu‐Jing Cui, Xiao‐Lin Li, Zeng‐Min Zhang, Shao‐Hua Liang, Yi Sun, Jing‐Min Li, Hong‐Lin Qu, Jing Ye, Qi‐Peng Guo, Quan Zheng, Yong‐Feng Liu   +11 more
wiley   +1 more source

Towards using optical/NIR photometry to measure the temperature of O stars [PDF]

arXiv, 2007
It has been traditionally stated that it is not possible to use optical/NIR photometry to measure the temperatures of O stars. In this contribution we describe the steps required to overcome the hurdles that have prevented this from happening in the past and we present our preliminary results for the low-extinction case.
arxiv  

Probing Disk Ice Content and Polycyclic Aromatic Hydrocarbon Emission through Multiband MagAO+Clio Images of HD 141569

The Astrophysical Journal
We present resolved images of the inner disk component around HD 141569A using the Magellan adaptive optics system with the Clio2 1–5 μ m camera, offering a glimpse of a complex system thought to be in a short evolutionary phase between protoplanetary ...
Jay K. Kueny, Alycia J. Weinberger, Jared R. Males, Katie M. Morzinski, Laird M. Close, Katherine B. Follette, Philip M. Hinz   +6 more
doaj   +1 more source

Astrometry and Photometry with Coronagraphs

, 2006
We propose a solution to the problem of astrometric and photometric calibration of coronagraphic images with a simple optical device which, in theory, is easy to use. Our design uses the Fraunhofer approximation of Fourier optics. Placing a periodic grid
Anand Sivaramakrishnan, Ben R. Oppenheimer, Chanan G., Lyot B., Yaitskova N., Yaitskova N.   +5 more
core   +1 more source

A GLP‐1R/Y1 receptor/Y2 receptor triple agonist decreases fentanyl‐evoked dopamine release in the nucleus accumbens and attenuates fentanyl taking and seeking in rats

British Journal of Pharmacology, EarlyView.
Abstract Background and Purpose Emerging literature indicates that simultaneously targeting glucagon‐like peptide‐1 receptors (GLP‐1Rs) and neuropeptide Y receptors (Y1/Y2) may represent a new pharmacotherapeutic approach to treating opioid use disorder (OUD).
Antonia Caffrey, Enzo Lavecchia, Kylie S. Chichura, Matthew R. Hayes, Robert P. Doyle, Heath D. Schmidt   +5 more
wiley   +1 more source

Liverpool Telescope Optical Photometry Following the 2006 Outburst of RS Ophiuchi [PDF]

arXiv, 2008
We present a preliminary report on the broadband optical photometry of the 2006 outburst of the recurrent nova RS Ophiuchi. These data were obtained using the robotic 2m Liverpool Telescope and cover the outburst from day 27 through day 548.
arxiv