Results 81 to 90 of about 43,562 (319)

Kinematics and Luminosities of Brown Dwarfs with the BDNYC group [PDF]

arXiv, 2014
Due to magnitude limits, the Gaia survey will not delve as deeply into the local population of brown dwarfs as it will other stellar populations. While hundreds or thousands of brown dwarfs will be measured by Gaia, we propose a different, indirect method wherein studies using Gaia data will help teach us about brown dwarfs: Identifying moving groups ...
arxiv  

Binary frequency of very young brown dwarfs at separations smaller than 3 AU [PDF]

, 2008
Searches for companions of brown dwarfs by direct imaging mainly probe orbital separations > 3-10 AU. On the other hand, previous radial velocity surveys of brown dwarfs are mainly sensitive to separations smaller than 0.6 AU. It has been speculated that the peak of the separation distribution of brown dwarf binaries lies right in the unprobed range ...
arxiv   +1 more source

Green Synthesis of Nano‐Sized Metal Oxides (Ag2O, CuO, ZnO, MgO, CaO, and TiO2) Using Plant Extract for a Sustainable Environment

Nano Select, EarlyView.
Synthesis of metal oxide from different types of green plants for a sustainable environment. ABSTRACT The demand for green synthesis of metal oxide nanomaterials is increasing tremendously to achieve sustainable development goals and for a clean environment.
Sanjana Afrin Disha, Md. Sahadat Hossain, Md. Lawshan Habib, Samina Ahmed   +3 more
wiley   +1 more source

Phase-resolved Hubble Space Telescope WFC3 Spectroscopy of the Weakly Irradiated Brown Dwarf GD 1400 and Energy Redistribution–Irradiation Trends in Six White Dwarf–Brown Dwarf Binaries

The Astrophysical Journal
Irradiated brown dwarfs offer a unique opportunity to bridge the gap between stellar and planetary atmospheres. We present high-quality Hubble Space Telescope/Wide Field Camera 3/G141 phase-resolved spectra of the white dwarf–brown dwarf binary GD 1400 ...
Rachael C. Amaro, Dániel Apai, Yifan Zhou, Joshua D. Lothringer, Sarah L. Casewell, Xianyu Tan, Ben W. P. Lew, Travis Barman, Mark S. Marley, L. C. Mayorga, Vivien Parmentier   +10 more
doaj   +1 more source

Self-consistent Models of Y Dwarf Atmospheres with Water Clouds and Disequilibrium Chemistry

The Astrophysical Journal, 2023
Y dwarfs are the coolest spectral class of brown dwarf. They have effective temperatures less than 500 K, with the coolest detection as low as ∼250 K.
Brianna Lacy, Adam Burrows
doaj   +1 more source

Where lies the peak of the brown dwarf binary separation distribution ? [PDF]

, 2008
Searches for companions of brown dwarfs by direct imaging probe mainly orbital separations > 3-10 AU. On the other hand, previous radial velocity surveys of brown dwarfs are mainly sensitive to separations smaller than 0.6 AU. It has been speculated if the peak of the separation distribution of brown dwarf binaries lies right in the unprobed range ...
arxiv   +1 more source

Habitability in Brown Dwarf Systems [PDF]

, 2017
Chapter accepted for the Handbook of Exoplanets in Section "Where Life May Arise: Habitability".
openaire   +3 more sources

Pulsating young brown dwarfs [PDF]

Astronomy & Astrophysics, 2005
5 pages, 3 figures, A&A Letters (in press)
Francesco Palla, Isabelle Baraffe
openaire   +4 more sources

A Possible Correlation between Metallicity and Near-IR Color for Late-M and L Dwarfs

The Astrophysical Journal
We examine the relationship between metallicity and J − K color for 64 benchmark late-M and L dwarfs, all of which are wide companions to higher-mass stars, and six of which are new discoveries.
Ruihan Zhang, Michael C. Liu, Zhoujian Zhang   +2 more
doaj   +1 more source

BROWN DWARFS: MYSTERY AND SHOW

Odessa Astronomical Publications, 2017
Results of the numerical simulation of the spectrum of the brown dwarf candidate Teide 1 discovered by Rebolo et al. (1995) are discussed.
Ya. V. Pavlenko
doaj   +1 more source