Results 71 to 80 of about 103,983 (326)

Quiescent X-ray emission from an evolved brown dwarf ?

, 2004
I report on the X-ray detection of Gl569Bab. During a 25ksec Chandra observation the binary brown dwarf is for the first time spatially separated in X-rays from the flare star primary Gl569A.
B. Stelzer, Lachaume R., Neuhauser R., Pallavicini R., Radler K.-H.   +4 more
core   +1 more source

Little Red Dots or Brown Dwarfs? NIRSpec Discovery of Three Distant Brown Dwarfs Masquerading as NIRCam-selected Highly Reddened Active Galactic Nuclei

The Astrophysical Journal Letters, 2023
Cold, substellar objects such as brown dwarfs have long been recognized as contaminants in color-selected samples of active galactic nuclei (AGNs). In particular, their near- to mid-infrared colors (1–5 μ m) can closely resemble the V-shaped ( f _λ ...
Danial Langeroodi, Jens Hjorth
doaj   +1 more source

Environmental and local habitat variables as predictors of trophic interactions in subtidal rocky reefs along the SE Pacific coast

Ecography, EarlyView.
Temperature generally drives latitudinal patterns in the strength of trophic interactions, including consumption rates. However, local community and other environmental conditions might also affect consumption, disrupting latitudinal gradients, which results in complex large‐scale patterns.
Catalina A. Musrri, Alistair G. B. Poore, Oscar Pino, Nicolás Riquelme, Wolfgang B. Stotz, Fadia Tala, Martin Thiel   +6 more
wiley   +1 more source

The Minimum Jeans Mass, Brown Dwarf Companion IMF, and Predictions for Detection of Y-type Dwarfs

, 2008
Cool L- and T-type objects were discovered first as companions to stars in 1988 and 1995, respectively. A certain example of the yet cooler Y-type spectral class (Teff
Allen, Allen, B. Zuckerman, Baraffe, Barnes, Bate, Becklin, Bessell, Boyd, Burgasser, Burgasser, Burgasser, Burrows, Chauvin, Chauvin, Chauvin, Chauvin, Chen, Close, Delorme, Els, Farihi, Fischer, Gaidos, Geballe, Geballe, Gizis, Golimowski, I. Song, Itoh, Kasper, Kasper, Kirkpatrick, Kirkpatrick, Kirkpatrick, Konopacky, Lafrenière, Lane, Liu, Low, Lowrance, Lowrance, Luhman, Luhman, Marcy, Marois, Masciadri, McElwain, McElwain, Metchev, Metchev, Mohanty, Mugrauer, Nakajima, Neuhauser, Nielsen, Nordström, Norman, Padoan, Padoan, Potter, Rafikov, Rebolo, Rice, Scholz, Seifahrt, Song, Song, Tokovinin, Warren, White, Whitworth, Wilson, Zuckerman, Zuckerman   +74 more
core   +1 more source

Spitzer Photometry of WISE-Selected Brown Dwarf and Hyper-Luminous Infrared Galaxy Candidates [PDF]

, 2012
We present Spitzer 3.6 and 4.5 $\mu$m photometry and positions for a sample of 1510 brown dwarf candidates identified by the WISE all-sky survey. Of these, 166 have been spectroscopically classified as objects with spectral types M(1), L(7), T(146), and ...
A. Mainzer, Andrew Blain, Ashby, Bridge, Burgasser, Burgasser, Burgasser, Carol Lonsdale, Carrie R. Bridge, Chao-Wei Tsai, Christopher R. Gelino, Cushing, Cutri, Daniel Stern, Deborah Padgett, Dominic Benford, Edward L. Wright, Eisenhardt, Eisenhardt, Eisenhardt, Emilio Donoso, Epchtein, Faherty, Fazio, Gelino, Gregory Mace, J. Davy Kirkpatrick, Jingwen Wu, Ken Marsh, Kirkpatrick, Kirkpatrick, Kirkpatrick, Kirkpatrick, Kirkpatrick, Lin Yan, Mainzer, Martin Cohen, Metchev, Michael C. Cushing, Michael E. Ressler, Michael F. Skrutskie, Morgan, Peter R. M. Eisenhardt, Roc M. Cutri, Roger L. Griffith, Sara Petty, Skrutskie, Spencer A. Stanford, Stern, Thomas H. Jarrett, Wright, Wright, Wu, York   +53 more
core   +5 more sources

HCN and C2H2 in the Atmosphere of a T8.5+T9 Brown Dwarf Binary

The Astrophysical Journal Letters
T-type brown dwarfs present an opportunity to explore atmospheres teeming with molecules such as H _2 O, CH _4 , and NH _3 , which exhibit a wealth of absorption features in the mid-infrared.
Elisabeth C. Matthews, Paul Mollière, Helena Kühnle, Polychronis Patapis, Niall Whiteford, Matthias Samland, Pierre-Olivier Lagage, Rens Waters, Shang-Min Tsai, Kevin Zahnle, Manuel Guedel, Thomas Henning, Bart Vandenbussche, Olivier Absil, Ioannis Argyriou, David Barrado, Alain Coulais, Adrian M. Glauser, Goran Olofsson, John P. Pye, Daniel Rouan, Pierre Royer, Ewine F. van Dishoeck, T. P. Ray, Göran Östlin   +24 more
doaj   +1 more source

An Investigation of New Brown Dwarf Spectral Binary Candidates From the Backyard Worlds: Planet 9 Citizen Science Initiative

The Astronomical Journal, 2023
We present three new brown dwarf spectral-binary candidates: CWISE J072708.09−360729.2, CWISE J103604.84−514424.4, and CWISE J134446.62−732053.9, discovered by citizen scientists through the Backyard Worlds: Planet 9 project.
Alexia Bravo, Adam C. Schneider, Daniella Bardalez Gagliuffi, Adam J. Burgasser, Aaron M. Meisner, J. Davy Kirkpatrick, Jacqueline K. Faherty, Marc J. Kuchner, Dan Caselden, Arttu Sainio, Les Hamlet, The Backyard Worlds: Planet 9 Collaboration   +11 more
doaj   +1 more source

Menstruation myths scale: A scale development study

International Journal of Gynecology &Obstetrics, EarlyView.
Abstract Objective The aim of this study was to develop a scale of menstruation myths. Methods The current research was conducted using a methodologic approach with a sample of 330 women who met the inclusion criteria. The scope, structural validity, and internal consistency of the scale were tested.
Şeyma Kilci Erciyas, Ebru Cirban Ekrem, Şirin Çetin   +2 more
wiley   +1 more source

Where lies the peak of the brown dwarf binary separation distribution ?

, 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.
Eric Stempels, Viki Joergens
core   +1 more source

Discovery of a nearby young brown dwarf binary candidate [PDF]

, 2010
In near-infrared NaCo observations of the young brown dwarf 2MASS J0041353-562112, we discovered a companion a little less than a magnitude fainter than the primary.
A. Reiners, A. Seifahrt, Close, Cruz, Dahn, Diolaiti, Faherty, Fischer, Hawley, Lenzen, Phan Bao, Phan Bao, Reiners, Reiners, S. Dreizler, Skrutskie, West   +16 more
core   +1 more source