Results 91 to 100 of about 389,568 (229)

THE NATURE OF TRANSITION CIRCUMSTELLAR DISKS. III. PERSEUS, TAURUS, AND AURIGA [PDF]

, 2012
As part of an ongoing program aiming to characterize a large number of Spitzer-selected transition disks (disks with reduced levels of near-IR and/or mid-IR excess emission), we have obtained (sub)millimeter wavelength photometry, high-resolution optical
L. Cieza, M. Schreiber, G. Romero, Jonathan P. Williams, A. Rebassa-Mansergas, B. Merín   +5 more
semanticscholar   +1 more source

Irradiated Disks May Settle into Staircases

The Astrophysical Journal
Much of a protoplanetary disk is thermally controlled by irradiation from the central star. Such a disk, long thought to have a smoothly flaring shape, is unstable due to the so-called irradiation instability .
Taylor Kutra, Yanqin Wu, Yoram Lithwick
doaj   +1 more source

THE NATURE OF TRANSITION CIRCUMSTELLAR DISKS. II. SOUTHERN MOLECULAR CLOUDS [PDF]

, 2012
Transition disk objects are pre-main-sequence stars with little or no near-IR excess and significant far-IR excess, implying inner opacity holes in their disks. Here we present a multifrequency study of transition disk candidates located in Lupus I, III,
G. Romero, M. Schreiber, L. Cieza, A. Rebassa-Mansergas, B. Mer'in, A. V. Smith Castelli, L. Allen, N. Morrell   +7 more
semanticscholar   +1 more source

Dual-band Observations of the Asymmetric Ring around CIDA 9A: Dead or Alive?

The Astrophysical Journal
While the most exciting explanation of the observed dust asymmetries in protoplanetary disks is the presence of protoplanets, other mechanisms can also form the dust features.
Daniel Harsono, Feng Long, Paola Pinilla, Alessia A. Rota, Carlo F. Manara, Gregory J. Herczeg, Doug Johnstone, Giovanni Rosotti, Giuseppe Lodato, Francois Menard, Marco Tazzari, Yangfan Shi   +11 more
doaj   +1 more source

First 3-D grid-based gas-dust simulations of circumstellar disks with an embedded planet [PDF]

, 2021
Fabian Binkert, J. Szulágyi, T. Birnstiel   +2 more
openalex   +1 more source

Multiwavelength Dust Characterization of the HL Tau Disk and Implications for Planet Formation

The Astrophysical Journal
We present a comprehensive analysis of the HL Tau dust disk by modeling its intensity profiles across six wavelengths (0.45–7.9 mm) with a resolution of 0 $\mathop{.}\limits^{^{\prime\prime} }$ 05 (∼7 au). Using a Markov Chain Monte Carlo (MCMC) approach,
Takahiro Ueda, Sean M. Andrews, Carlos Carrasco-González, Osmar M. Guerra-Alvarado, Satoshi Okuzumi, Ryo Tazaki, Akimasa Kataoka   +6 more
doaj   +1 more source

Disk Evolution Study Through Imaging of Nearby Young Stars (DESTINYS): Characterization of the young star T CrA and its circumstellar environment [PDF]

, 2023
E. Rigliaco, R. Gratton, Simone Ceppi, C. Ginski, M. R. Hogerheijde, M. Benisty, T. Birnstiel, Marco Dima, Stefano Facchini, A. Garufi, Jaehan Bae, M. Langlois, Giuseppe Lodato, Eric E. Mamajek, C. F. Manara, F. Ménard, Álvaro Ribas, A. Zurlo   +17 more
openalex   +1 more source

Velocity Structure of Circumstellar Environment around Class 0/I Protostars: Uncertainty in the Protostellar Mass Estimation Using Circumstellar Velocities

The Astrophysical Journal
Recent high-resolution observations have enabled detailed investigations of the circumstellar environments around Class 0/I protostars. Several studies have reported that the infall velocity of the envelope is a few times smaller than the freefall ...
Shingo Hirano, Yuri Aikawa, Masahiro N. Machida   +2 more
doaj   +1 more source

Circumstellar Disks Around Rapidly Rotating Be-Type Stars

, 2022
Y. Touhami
openalex   +2 more sources

Probing Dust and Gas Properties Using Ringed Disks

The Astrophysical Journal Letters
How rapidly a planet grows in mass and how far it may park from the host star depend sensitively on two nondimensional parameters: Stokes number St and turbulent α .
Eve J. Lee
doaj   +1 more source