Results 91 to 100 of about 482,777 (285)

An Amygdala‐hippocampus Circuit for Endocannabinoid Modulation of Anxiety Avoidance

Advanced Science, EarlyView.
This study employs three synapse‐specific endocannabinoids (eCB) probes to monitor dynamic eCB release, activate CB1Rs and knockdown 2‐AG biosynthesis enzymes in glutamatergic anterior basolateral amygdala ‐ ventral hippocampus (aBLA–vHPC) circuit. At aBLA–vHPC circuits, activation of CB1Rs reduce anxiety avoidance, and knockdown of eCB biosynthesis ...
Bao Xue, Mao‐Xing Zhang, Xiao‐Chen Bi, Shou‐Peng Lai, Xin‐Tian Bie, Yuan Dong, Jian‐Feng Li, Fang Gao, Xia Zhang, Ying Wang   +9 more
wiley   +1 more source

Optical photometry of the eclipsing Large Magellanic Cloud supersoft source CAL 87 [PDF]

, 1997
We present optical photometry of the eclipsing supersoft source, CAL87. These observations comprise long term data accumulated as a by-product of the MACHO Project, and high speed white light photometry of a single eclipse. We (i) derive an improved ephemeris of To = HJD 2450111.5144(3) + 0.44267714(6)E for the time of minimum light, (ii) find the ...
arxiv   +1 more source

First Light LBT AO Images of HR 8799 bcde at 1.65 and 3.3 Microns: New Discrepancies between Young Planets and Old Brown Dwarfs

, 2012
As the only directly imaged multiple planet system, HR 8799 provides a unique opportunity to study the physical properties of several planets in parallel.
Adam Burrows, Alfio Puglisi, Andrew J. Skemer, Armando Riccardi, Barman, Barman, Bowler, Burgasser, Burrows, Burrows, Burrows, Carmelo Arcidiacono, Chabrier, Craig Kulesa, Currie, Daniel Apai, Dino Mesa, Dodson-Robinson, Don McCarthy, Douglas L. Miller, Dupuy, Elena Masciadri, Enrico Pinna, Esposito, Fabrycky, Fernando Quiros-Pacheco, Filippo Mannucci, Galicher, Geballe, Gray, Guido Agapito, Guido Brusa, Heinze, Hinkley, Hinz, Janson, Jared Males, Jarron Leisenring, Javier Argomedo, John C. Wilson, John M. Hill, Joshua Eisner, Juan Carlos Guerra, Katherine B. Follette, Katie Morzinski, Knapp, Konstantina Boutsia, Kratter, Lafrenière, Laird Close, Leggett, Lorenzo Busoni, Luca Fini, Madhusudhan, Marco Xompero, Marley, Marois, Matthew Nelson, Megan Krejny, Metchev, Michael R. Meyer, Michael Skrutskie, Moro-Martín, Moór, Paolo Stefanini, Peter Garnavich, Philip M. Hinz, Raffaele Gratton, Riccardo Claudi, Runa Briguglio, Sascha P. Quanz, Saumon, Silvano Desidera, Simone Esposito, Skemer, Su, Sudol, Terry Jones, Timothy J. Rodigas, Vanessa Bailey, Vidhya Vaitheeswaran, William F. Hoffmann, Zuckerman   +82 more
core   +1 more source

The Slow‐Rotating Nucleus of Comet C/2013 R1 (Lovejoy)

Astronomische Nachrichten, EarlyView.
ABSTRACT The close approach of comet C/2013 R1 (Lovejoy) allowed us to conduct an in‐depth study of the morphology of the inner coma. From the measurement of the dust emission structures expanding near the cometary nucleus in November–December 2013, we derived a slow rotation period of 47.8±1.2$$ 47.8\pm 1.2 $$ h.
Federico Manzini, Virginio Oldani, Andrea Farina, Paolo Ochner, Andrea Reguitti, Luigi R. Bedin, Jean Gabriel Bosch, Erik Bryssinck, Roberto Crippa, Stéphan Gaumont‐Guay, Carl W. Hergenrother, Joel Nicolas, Ivo Scheggia   +12 more
wiley   +1 more source

LGS AO Science Impact: Present and Future Perspectives

, 2008
The recent advent of laser guide star adaptive optics (LGS AO) on the largest ground-based telescopes has enabled a wide range of high angular resolution science, previously infeasible from ground-based and/or space-based observatories.
Liu, Michael C.
core   +1 more source

Massive stellar systems: observational challenges and perspectives in the E-ELT era [PDF]

, 2015
We introduce the empirical framework concerning optical and near-infrared (NIR) photometry of crowded stellar fields. In particular, we address the impact that linear detectors and analytical PSF played in improving the accuracy and the precision of ...
Bono, G., Braga, V. F., Ferraro, I., Fiorentino, G., Gilmozzi, R., Iannicola, G., Magurno, D., Matsunaga, N., Monelli, M., RASTELLO, SARA   +9 more
core   +1 more source

Optical photometry of the UCM lists I and II [PDF]

Astronomy & Astrophysics, 2001
We present Johnson B surface photometry for the UCM Survey galaxies. One-dimensional bulge-disk decomposition is attempted, discussing on fitting functions and computational procedures. The results from this decomposition, jointly with concentration indices and an asymmetry coefficient, are employed to study the morphological properties of these ...
Pérez González, Pablo Guillermo, Gallego Maestro, Jesús, Zamorano Calvo, Jaime, Gil De Paz, Armando   +3 more
openaire   +7 more sources

A Slowly Pulsating Run‐Away B Star at High Galactic Latitude Ejected From a Spiral Arm

Astronomische Nachrichten, EarlyView.
ABSTRACT We report the discovery of the young B6 V run‐away star LAMOST J083323.18 + 430825.4, 2.5 kpc above the Galactic plane. Its atmospheric parameters and chemical composition are determined from LAMOST spectra, indicating normal composition. Effective temperature (Teff$$ {T}_{\mathrm{eff}} $$ = 14,500$$ \mathrm{14,500} $$ K) and gravity (logg ...
Ulrich Heber, Maximilian Halenke, Aakash Bhat, Veronika Schaffenroth   +3 more
wiley   +1 more source

Unlocking the secrets of stellar haloes using combined star counts and surface photometry [PDF]

MNRAS 421 (2012), 190, 2011
The stellar haloes of galaxies can currently be studied either through observations of resolved halo stars or through surface photometry. Curiously, the two methods appear to give conflicting results, as a number of surface photometry measurements have revealed integrated colours that are too red to be reconciled with the halo properties inferred from ...
arxiv   +1 more source

New Astronomical Observatory Design for the Detection and Tracking of Satellite Objects: The Satellite Robotic Observatory (SRO)

Remote Sensing
Robotic Astronomical Observatories (RAOs) have provided very good results in different research projects in astrophysics/astronomy. Their applications in the detection, tracking, and identification of near-Earth objects have contributed to the ...
Francisco Espartero, Javier Cubas, David Nespral, Santiago Pindado   +3 more
doaj   +1 more source