Results 21 to 30 of about 586 (186)

Detection of DCO⁺in a circumstellar disk [PDF]

Astronomy & Astrophysics, 2003
Accepted by A&A Letters; 4 pages, 1 ...
Dishoeck, E.F., Thi, W.F.D., van Zadelhoff, G.J.   +2 more
openaire   +5 more sources

Processed and Unprocessed Ices in Circumstellar Disks [PDF]

Highlights of Astronomy, 2005
AbstractWe present 3-5 µm VLT-ISAAC spectroscopy showing the presence of methanol ices in edge-on disks of young embedded stars. Examples include the disks of L1489 IRS in Taurus and CRBR 2422.8-3423 in Ophiuchus, the last of which has the highest column density of solid CO known toward a YSO.
Pontoppidan, K., Dartois, E., Thi, W. -F., van Dishoeck, E. F.   +3 more
openaire   +2 more sources

Spectropolarimetry and the Study of Circumstellar Disks [PDF]

, 2007
Circumstellar disks play an important role in many stages of the evolution of stars. However, it is only possible to directly image circumstellar disks for a few of the nearest stars. For massive stars, the situation is even more difficult, as they are on average further away than the more numerous low mass stars.
openaire   +2 more sources

Unveiling the Circumstellar Envelope and Disk: A Subarcsecond Survey of Circumstellar Structures [PDF]

The Astrophysical Journal, 2000
47 Pages, 18 Figures, ApJ ...
Looney, Leslie W., Mundy, Lee G., Welch, W. J.   +2 more
openaire   +2 more sources

Polarization in the GG Tau Ring—Confronting Dust Self-scattering, Dust Mechanical and Magnetic Alignment, Spirals, and Dust Grain Drift

The Astrophysical Journal Letters, 2023
We report Atacama Large Millimeter/submillimeter Array (ALMA) polarization observations at 3 and 0.9 mm toward the GG Tau A system. In the ring, the percentage is relatively homogeneous at 3 mm, being 1.2%, while it exhibits a clear radial variation at 0.
Ya-Wen Tang, Anne Dutrey, Patrick M. Koch, Stephane Guilloteau, Hsi-Wei Yen, Emmanuel di Folco, Eric Pantin, Takayuki Muto, Akimasa Kataoka, Robert Brauer   +9 more
doaj   +1 more source

Planet–planet scattering in circumstellar gas disks [PDF]

Astronomy and Astrophysics, 2010
Astronomy and Astrophysics Letters, in ...
MARZARI, FRANCESCO, BARUTEAU, C, SCHOLL, H.   +2 more
openaire   +2 more sources

Microlensing of Circumstellar Disks

The Astrophysical Journal, 2005
9 pages, 7 figures.
Zheng, Zheng, Ménard, Brice
openaire   +2 more sources

Early Planet Formation in Embedded Disks (eDisk). XIII. Aligned Disks with Nonsettled Dust around the Newly Resolved Class 0 Protobinary R CrA IRAS 32

The Astrophysical Journal
Young protostellar binary systems, with expected ages less than ∼10 ^5 yr, are little modified since birth, providing key clues to binary formation and evolution. We present a first look at the young, Class 0 binary protostellar system R CrA IRAS 32 from
Frankie J. Encalada, Leslie W. Looney, Shigehisa Takakuwa, John J. Tobin, Nagayoshi Ohashi, Jes K. Jørgensen, Zhi-Yun Li, Yuri Aikawa, Yusuke Aso, Patrick M. Koch, Woojin Kwon, Shih-Ping Lai, Chang Won Lee, Zhe-Yu Daniel Lin, Alejandro Santamaría-Miranda, Itziar de Gregorio-Monsalvo, Nguyen Thi Phuong, Adele Plunkett, Jinshi Sai (Insa Choi), Rajeeb Sharma, Hsi-Wei Yen, Ilseung Han   +21 more
doaj   +1 more source

Long-term optical variability of high-mass X-ray binaries

Astronomy & Astrophysics
Context. Systems known as Be/X-ray binaries form the most numerous group of high-mass X-ray binaries. Their long-term optical and infrared variability reflects the evolution of the circumstellar disk around the luminous companion.
Reig P., Blinov D., Tzouvanou A.
doaj   +1 more source

Confined Chemistry in Space: Zeolite‐Supported Fe13 Nanoclusters Modulate CS Reactivity

Small Structures, Volume 7, Issue 3, March 2026.
The study explores how an Fe13 cluster confined in chabazite reshapes the reaction of CS and H2 under astrochemical conditions. Confinement promotes C–S bond cleavage over hydrogenation, directing chemistry toward CH4 and H2S formation. Additional CS enables CS2 and C2 species. Microkinetic analysis identifies protoplanetary environments where zeolites
Gerard Pareras, Albert Rimola
wiley   +1 more source