Results 191 to 200 of about 2,119 (235)

The dramatic transition of the extreme Red Supergiant WOH G64 to a Yellow Hypergiant

Munoz-Sanchez G, Kalitsounaki M, de Wit S, Antoniadis K, Bonanos A, Zapartas E, Boutsia K, Christodoulou E, Maravelias G, Soszyński I, Udalski A.   +10 more
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Infrared Spectroscopy of Neutral and Cationic Sumanene (C₂₁H₁₂ & C₂₁H₁₂ ⁺) in the Gas Phase: Implications for Interstellar Aromatic Infrared Bands (AIBs). [PDF]

ACS Earth Space Chem
Sundararajan P, Ferrari P, Brünken S, Buma WJ, Candian A, Tielens A.   +5 more
europepmc   +1 more source

Search for Chirality in Hydrogenated Magnesium Nanosilicates: A DFT and TD-DFT Investigation. [PDF]

J Phys Chem A
Stelmach KB, Dukes CA, Garrod RT.
europepmc   +1 more source

Beta Pic-like Circumstellar Gas Disk Around 2 And

, 2003
P. Cheng
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Energy partitioning in H₂ formation on interstellar carbonaceous grains. Insights from <i>ab initio</i> molecular dynamics simulations.

Phys Chem Chem Phys
Jubert L, Martínez-Bachs B, Pareras G, Rimola A.   +3 more
europepmc   +1 more source

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Observations of Circumstellar Disks

Astrophysics and Space Science, 2004
This review presents recent results on protoplanetary disks obtained from angularly resolved observations. Observations with mm arrays show that disks are in Keplerian rotation, with radius as large as 1000 AU. Optical images show disks to be flared.
Anne Dutrey, Stéphane Guilloteau
openaire   +1 more source

A Circumstellar Disk Around β Pictoris

Science, 1984
A circumstellar disk has been observed optically around the fourth-magnitude star β Pictoris. First detected in the infrared by the Infrared Astronomy Satellite last year, the disk is seen to extend to more than 400 astronomical units from the star, or more than twice the distance measured in the infrared by the Infrared Astronomy Satellite.
B A, Smith, R J, Terrile
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Dusty Circumstellar Disks

Annual Review of Astronomy and Astrophysics, 2001
▪ Abstract  Dusty circumstellar disks in orbit around main-sequence stars were discovered in 1983 by the infrared astronomical satellite. It was the first time material that was not another star had been seen in orbit around a main-sequence star other than our Sun.
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Ripping up a circumstellar disk

Science, 2020
Stellar Astrophysics During the process of star formation, a disk of gas and dust forms around the young star, controlling the accretion of more material. Once the star has formed, any leftover material in this circumstellar disk can form planets. If a binary or triple star forms at the center of the disk, theoretical models predict that tidal torques ...
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Circumstellar disks and planetary formation

The Moon and the Planets, 1978
The role of circumstellar disks in star and planetary formation is briefly reviewed. The observed disk around MWC 349 is used as an example and a table of evolutionary time scales and parameters is presented. The disk about MWC 349 is characteristic of that expected about a massive star. Disk structure about solar mass stars is more completely reviewed
Rodger I. Thompson, Peter A. Strittmatter   +1 more
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