Results 71 to 80 of about 2,036 (233)

Modeling Circumstellar Gas Emission around a White Dwarf Using cloudy

The Astronomical Journal
The chemical composition of an extrasolar planet is fundamental to its formation, evolution, and habitability. In this study, we explore a new way to measure the chemical composition of the building blocks of extrasolar planets by measuring the gas ...
Siyi Xu, Sherry Yeh, Laura. K. Rogers, Amy Steele, Erik Dennihy, Alexandra E. Doyle, P. Dufour, Beth L. Klein, Christopher J. Manser, Carl Melis, Tinggui Wang, Alycia J. Weinberger   +11 more
doaj   +1 more source

Circumstellar Disks Around Rapidly Rotating Be-Type Stars

, 2022
Y. Touhami
openalex   +2 more sources

Imaging Circumstellar Debris Disks

, 1998
4 pages, includes one color PostScript figure, to appear in Proceedings of the Vatican Observatory Symposium on Astrophysics Research and Science ...
openaire   +2 more sources

The Warped Circumstellar Disk of HD 100546

The Astrophysical Journal, 2006
We propose that the two armed spiral features seen in visible Hubble Space Telescope images of scattered light in HD100546's circumstellar disk are caused by the illumination of a warped outer disk. A tilt of 6-15 degrees from the symmetry plane can cause the observed surface brightness variations providing the disk is very twisted (highly warped) at ...
openaire   +2 more sources

VLTI/GRAVITY Provides Evidence the Young, Substellar Companion HD 136164 Ab Formed Like a “Failed Star”

The Astronomical Journal
Young, low-mass brown dwarfs orbiting early-type stars, with low mass ratios ( q ≲ 0.01), appear to be intrinsically rare and present a formation dilemma: could a handful of these objects be the highest-mass outcomes of “planetary” formation channels ...
William O. Balmer, L. Pueyo, S. Lacour, J. J. Wang, T. Stolker, J. Kammerer, N. Pourré, M. Nowak, E. Rickman, S. Blunt, A. Sivaramakrishnan, D. Sing, K. Wagner, G.-D. Marleau, A.-M. Lagrange, R. Abuter, A. Amorim, R. Asensio-Torres, J.-P. Berger, H. Beust, A. Boccaletti, A. Bohn, M. Bonnefoy, H. Bonnet, M. S. Bordoni, G. Bourdarot, W. Brandner, F. Cantalloube, P. Caselli, B. Charnay, G. Chauvin, A. Chavez, E. Choquet, V. Christiaens, Y. Clénet, V. Coudé du Foresto, A. Cridland, R. Davies, R. Dembet, A. Drescher, G. Duvert, A. Eckart, F. Eisenhauer, N. M. Förster Schreiber, P. Garcia, R. Garcia Lopez, E. Gendron, R. Genzel, S. Gillessen, J. H. Girard, S. Grant, X. Haubois, G. Heißel, Th. Henning, S. Hinkley, S. Hippler, M. Houllé, Z. Hubert, L. Jocou, M. Keppler, P. Kervella, L. Kreidberg, N. T. Kurtovic, V. Lapeyrère, J.-B. Le Bouquin, P. Léna, D. Lutz, A.-L. Maire, F. Mang, A. Mérand, P. Mollière, C. Mordasini, D. Mouillet, E. Nasedkin, T. Ott, G. P. P. L. Otten, C. Paladini, T. Paumard, K. Perraut, G. Perrin, O. Pfuhl, D. C. Ribeiro, L. Rodet, Z. Rustamkulov, J. Shangguan, T. Shimizu, C. Straubmeier, E. Sturm, L. J. Tacconi, A. Vigan, F. Vincent, K. Ward-Duong, F. Widmann, T. Winterhalder, J. Woillez, S. Yazici, the GRAVITY Collaboration   +96 more
doaj   +1 more source

Sites of Planet Formation in Binary Systems. II. Double the Disks in DF Tau

The Astronomical Journal
This article presents the latest results of our Atacama Large Millimeter/submillimeter Array (ALMA) program to study circumstellar disk characteristics as a function of orbital and stellar properties in a sample of young binary star systems known to host
Taylor Kutra, Lisa Prato, Benjamin M Tofflemire, Rachel Akeson, G. H. Schaefer, Shih-Yun Tang, Dominique Segura-Cox, Christopher M. Johns-Krull, Adam Kraus, Sean Andrews, Eric L. N. Jensen   +10 more
doaj   +1 more source

CIRCUMSTELLAR DISKS AROUND BINARY STARS IN TAURUS

The Astrophysical Journal, 2014
We have conducted a survey of 17 wide (> 100 AU) young binary systems in Taurus with the Atacama Large Millimeter Array (ALMA) at two wavelengths. The observations were designed to measure the masses of circumstellar disks in these systems as an aid to understanding the role of multiplicity in star and planet formation.
Akeson, R. L., Jensen, Eric L.N.
openaire   +4 more sources

Evolution of Circumstellar Disks around T Tauri Stars as a Function of Stellar Age

, 2023
L. Prato, M. Simon
openalex   +1 more source

Disk in the Circumstellar Envelope of Carbon Mira V Cygni

The Astronomical Journal
Asymptotic giant branch (AGB) stars are the primary source of dust and complex molecules in the interstellar medium. The determination of outflow parameters is often hindered by the unknown geometry of the circumstellar environment, creating a demand for
Boris S. Safonov, Sergey G. Zheltoukhov, Andrey M. Tatarnikov, Ivan A. Strakhov, Victor I. Shenavrin   +4 more
doaj   +1 more source

Mass Loss in Be Stars: News from Two Fronts

Galaxies
Be stars are characterized by the presence of a circumstellar Keplerian disk formed from material ejected from the rapidly rotating stellar surface.
Alex C. Carciofi, Guilherme P. P. Bolzan, Pâmela R. Querido, Amanda C. Rubio, Jonathan Labadie-Bartz, Tajan H. de Amorim, Ariane C. Fonseca Silva, Vittória L. Schiavolim   +7 more
doaj   +1 more source