Results 21 to 30 of about 1,448,608 (292)

Brown Dwarfs in the Hyades and Beyond? [PDF]

The Astronomical Journal, 1999
We have used both the Low-Resolution Imaging Spectrograph and the HIRES echelle spectrograph on the Keck telescopes to obtain spectra of twelve candidate members of the Hyades cluster identified by Leggett and Hawkins (1988, 1989). All of the objects are chromospherically-active, late-type M-dwarfs, with H$α$ equivalent widths varying from 1 to 30Å ...
Reid, I. Neill, Hawley, Suzanne L.
openaire   +2 more sources

Brown dwarfs in open clusters

, 2005
This thesis presents the results of the work undertaken during the course of this PhD.;Firstly, the results of a large, deep survey of 5.65 square degrees of the Taurus Dark Clouds are presented.
Samantha Louise Osborne (7678322)
core   +4 more sources

MACHOs as brown dwarfs

, 1998
Recent observations of microlensing events in the Large Magellanic Cloud suggest that a sizable fraction of the galactic halo is in the form of Massive Astrophysical Compact Halo Objects (MACHOs). Although the average MACHO mass is presently poorly known, the value $\sim 0.1 M_{\odot}$ looks as a realistic estimate, thereby implying that brown dwarfs ...
DE PAOLIS, Francesco, INGROSSO, Gabriele, P. Jetzer, M. Roncadelli   +3 more
openaire   +3 more sources

THE LUMINOSITIES OF THE COLDEST BROWN DWARFS [PDF]

The Astrophysical Journal, 2014
Accepted for publication in The Astrophysical Journal (Oct 2, 2014).
C. G. Tinney, Jacqueline K. Faherty, J. Davy Kirkpatrick, Mike Cushing, Caroline V. Morley, Edward L. Wright   +5 more
openaire   +3 more sources

BDCoA 2013 Talk : Brown Dwarfs and Nearby Young Associations

, 2014
A description of our survey for young brown dwarfs in nearby moving groups, and the presentation of the latest results, given at the Brown Dwarfs Come of Age workshop, at Fuerteventura, Spain.
Étienne Artigau (479808), Philippe Delorme (479809), Lison Malo (479807), David Lafrenière (479805), René Doyon (479806), Jonathan Gagné (479804)   +5 more
core   +1 more source

A measurement of the wind speed on a brown dwarf [PDF]

Science, 2020
High winds in an extrasolar atmosphere Brown dwarfs are objects intermediate in mass between large planets and small stars, and their atmospheres share many characteristics with gas giant planets. Wind speeds in Solar System gas giant atmospheres can be derived by comparing the planet's rotational periods in the infrared (tracing
Katelyn. N. Allers, Johanna M. Vos, Beth A. Biller, Peter. K. G. Williams   +3 more
openaire   +2 more sources

Predicting the Detection Yields of Giant Planets and Brown Dwarfs with CSST Astrometry

The Astronomical Journal
Chinese Space Station Telescope (CSST), which will begin its scientific operations around 2027, is going to survey the sky area of the median-to-high Galactic latitude and median-to-high ecliptic latitude.
Yifan Xuan, Fabo Feng, Zhensen Fu, Shilong Liao, Zhaoxiang Qi, Yang Chen   +5 more
doaj   +1 more source

Searching for weather in brown dwarfs [PDF]

Monthly Notices of the Royal Astronomical Society, 1999
8 pages, 7 figures. To appear in the Monthly Notices of the RAS.
Tinney, C. G., Tolley, A. J.
openaire   +2 more sources

Blue Light Receptor PHR2‐Mediated Spectrum Antiviral Immunity

Advanced Science, EarlyView.
Blue light suppresses RBSDV through the blue‐light receptor ZmPHR2, which interacts with ZmISP in chloroplasts to trigger ROS burst and antiviral defense. The viral effector P6 enhances ZmPHR2–ZmISP interaction, alters their distribution, and suppresses ROS.
Runyi Chen, Yuxin Tai, Xinyu Wang, Chunhua Mu, Xia Liu, Gongjian Li, Jiayi Liu, Xin Lu, Duo Shi, Zhiqiang Zhou, Jienan Han, Zhuanfang Hao, Mingshun Li, Degui Zhang, Hongjun Yong, Zhennan Xu, Jianfeng Weng, Xinhai Li   +17 more
wiley   +1 more source

Exploring brown dwarf disks [PDF]

Astronomy & Astrophysics, 2001
4 pages, 4 figures, A&A Letters in ...
NATTA A, TESTI L
openaire   +4 more sources