Results 31 to 40 of about 5,171 (308)

PICASO 3.0: A One-dimensional Climate Model for Giant Planets and Brown Dwarfs

The Astrophysical Journal, 2023
Upcoming James Webb Space Telescope observations will allow us to study exoplanet and brown dwarf atmospheres in great detail. The physical interpretation of these upcoming high signal-to-noise observations requires precise atmospheric models of ...
Sagnick Mukherjee, Natasha E. Batalha, Jonathan J. Fortney, Mark S. Marley   +3 more
doaj   +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

Unraveling the brown dwarf desert: Four new discoveries and a unifying period-coded picture

Astronomy & Astrophysics
We present four newly validated transiting brown dwarfs identified through TESS photometry and confirmed with high-precision radial velocity measurements obtained from the FEROS and PLATOSpec spectrographs.
Šubjak Ján, Brahm Rafael, Lipták Jozef, Eberhardt Jan, Tala Pinto Marcelo, Casewell Sarah L., Henning Thomas, Hesse Katharine, Trifonov Trifon, Jordán Andrés, Rojas Felipe I., Vítková Michaela, Salinas Helem, Boyle Gavin, Suc Vincent, Antonucci Luca, Bernacki Krzysztof, Briceño César, Collins Karen A., Fernández Fernández Jorge, Gill Samuel, Janík Jan, Law Nicholas, Mann Andrew W., McCormac James, Popowicz Adam, Sebastian Daniel, Skarka Marek, Václavík Ján, Vanzi Leonardo, West Richard G., Wilkin Francis P., Ziegler Carl   +32 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

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

JWST/NIRSpec Observations of the Coldest Known Brown Dwarf

The Astronomical Journal, 2023
We present 1–5 μ m spectroscopy of the coldest known brown dwarf, WISE J085510.83−071442.5 (WISE 0855), performed with the Near-Infrared Spectrograph (NIRSpec) on board the James Webb Space Telescope (JWST).
K. L. Luhman, P. Tremblin, C. Alves de Oliveira, S. M. Birkmann, I. Baraffe, G. Chabrier, E. Manjavacas, R. J. Parker, J. Valenti   +8 more
doaj   +1 more source

Stars and brown dwarfs in the

, 2012
Context. Although many studies have been performed so far, there are still dozens of low-mass stars and brown dwarfs in the young σ Orionis open cluster without detailed spectroscopic characterisation. Aims.
Cabrera Lavers, A., A. Cabrera-Lavers, Caballero, J. A., S. Pascual, D. García-Álvarez, Pascual Ramírez, Sergio, J. A. Caballero, García Álvarez, David   +7 more
core   +1 more source

A Virus‐Inducible E3–RLCK–MADS Module Coordinates Suppression of Plant Immunity and Fertility in Rice

Advanced Science, EarlyView.
ABSTRACT Viruses often hijack host developmental programs to promote infection, but the mechanistic links between reproductive regulation and antiviral immunity remain incompletely understood. Here, we identify a virus‐triggered hierarchical degradation cascade that links antiviral immunity and fertility regulation in rice. We show that the rice grassy
Yuansheng Wu, Fengling Wu, Shiting Huang, Denglu Yang, Xin Lei, Xue Zhang, Na Liu, Peng Gan, Chuan Li, Jie Zhang, Ming Wu, Qingxiao Jia, Shanshan Zhao, Jianguo Wu   +13 more
wiley   +1 more source

The “Mysterious” Origin of Brown Dwarfs [PDF]

The Astrophysical Journal, 2004
11 pages, 3 figures, ApJ submitted Error in equation 1 has been corrected.
Padoan, Paolo, Nordlund, AAke
openaire   +2 more sources

Advances in Chitosan Nanoparticles: A Comprehensive Review of Properties, Synthesis, Characterization, Multidisciplinary Applications, and Future Perspectives

Journal of Applied Polymer Science, EarlyView.
This review highlights the synthesis of chitosan nanoparticles from natural sources, the thorough characterization of them, and use of microscopic and spectroscopic methods. It emphasizes that it has some indispensable properties such as being non‐toxic, antimicrobial, and capable of controlled drug release.
Mariam Sohail Mansoor, Nayab Raza, Furqana Bibi, Madiha Mumtaz, Asif Abbas, Farasat Haider, Basit Ali   +6 more
wiley   +1 more source