Results 31 to 40 of about 1,290 (180)

How Do Stars Gain Their Mass? A JCMT/SCUBA-2 Transient Survey of Protostars in Nearby Star-forming Regions [PDF]

The Astrophysical Journal, 2017
Abstract Most protostars have luminosities that are fainter than expected from steady accretion over the protostellar lifetime. The solution to this problem may lie in episodic mass accretion—prolonged periods of very low accretion punctuated by short bursts of rapid accretion.
Gregory J. Herczeg, Doug Johnstone, Steve Mairs, Jennifer Hatchell, Jeong-Eun Lee, Geoffrey C. Bower, Huei-Ru Vivien Chen, Yuri Aikawa, Hyunju Yoo, Sung-Ju Kang, Miju Kang, Wen-Ping Chen, Jonathan P. Williams, Jaehan Bae, Michael M. Dunham, Eduard I. Vorobyov, Zhaohuan Zhu, Ramprasad Rao, Helen Kirk, Satoko Takahashi, Oscar Morata, Kevin Lacaille, James Lane, Andy Pon, Aleks Scholz, Manash R. Samal, Graham S. Bell, Sarah Graves, E’lisa M. Lee, Harriet Parsons, Yuxin He, Jianjun Zhou, Mi-Ryang Kim, Scott Chapman, Emily Drabek-Maunder, Eun Jung Chung, Stewart P. S. Eyres, Jan Forbrich, Lynne A. Hillenbrand, Shu-ichiro Inutsuka, Gwanjeong Kim, Kyoung Hee Kim, Yi-Jehng Kuan, Woojin Kwon, Shih-Ping Lai, Bhavana Lalchand, Chang Won Lee, Chin-Fei Lee, Feng Long, A-Ran Lyo, Lei Qian, Peter Scicluna, Archana Soam, Dimitris Stamatellos, Shigehisa Takakuwa, Ya-Wen Tang, Hongchi Wang, Yiren Wang   +57 more
openaire   +5 more sources

Modelling and observations of molecules in discs around young stars [PDF]

, 2013
This thesis contains a study of molecules within circumstellar discs around young stars. Firstly, the chemistry of a disc around a young, Class 0 protostar is modelled.
Ilee, John David
core  

Pulsational instability of supergiant protostars: do they grow supermassive by accretion? [PDF]

, 2013
Supermassive stars (SMSs; M* ≳ 10[5] M⊙) and their remnant black holes are promising progenitors for supermassive black holes (SMBHs) observed in the early universe at z ≳ 7. It has been postulated that SMSs form through very rapid mass accretion on to a
Omukai, K., Hosokawa, T., Inayoshi, K.
core   +1 more source

The Role of Benzonitrile Chlorination Explored by Dissociative Electron Attachment

ChemPhysChem, Volume 27, Issue 9, 14 May 2026.
Experimental and theoretical dissociative electron attachment study of 2‐ and 4‐chlorobenzonitrile. The dissociative electron attachment process to ortho‐ and para‐chlorobenzonitrile was investigated in the 0–12 eV energy range with a crossed‐beam time‐of‐flight mass spectrometer, supported by quantum chemical scattering calculations.
Pedro Guerra, Mónica Mendes, Ely G. F. de Miranda, Rodrigo Rodrigues, Lucas M. Cornetta, Filipe Ferreira da Silva   +5 more
wiley   +1 more source

Star formation in the Magellanic Clouds - IV. Protostars in the vicinity of 30 Doradus [PDF]

Monthly Notices of the Royal Astronomical Society, 1992
From a magnitude-limited infrared survey of the 30 Doradus complex four candidate protostars have been identified. These are associated with dense knots in the nebular arcs, and have luminosities of 1-5 × 10 4 L ⊙ and masses of 15-20 M ⊙ . The results indicate that both the knots and the associated star formation are likely to be caused by the ...
A. R. Hyland, S. Straw, T. J. Jones, I. Gatley   +3 more
openaire   +1 more source

Small‐scale elemental abundance variations in Ryugu particles from touchdown 1

Meteoritics &Planetary Science, Volume 61, Issue 4, Page 580-599, April 2026.
Abstract Ryugu materials closely resemble CI chondrites' mineralogical, chemical, and isotopic compositions; yet minor but resolvable differences in certain elemental abundances are evident. In this study, the bulk chemical compositions of eight individual Ryugu particles (1.5–4.3 mg) from the first touchdown site (TD1) were determined using triple ...
Karina López García, Tetsuya Yokoyama, Ikshu Gautam, Makiko K. Haba, Tsuyoshi Iizuka, Nao Nakanishi, Ryota Fukai   +6 more
wiley   +1 more source

High resolution studies of early type emission line stars [PDF]

, 2010
This thesis presents a study of early type, emission line objects on small angular scales. Spectroastrometry is used to separate the spectra of unresolved Herbig Ae/Be binary systems.
Wheelwright, Hugh Eric
core  

Satellites and Small Bodies With ALMA: Insights Into Solar System Formation and Evolution

AGU Advances, Volume 6, Issue 6, December 2025.
Abstract Our understanding of the formation and evolution of planetary systems has made major advances in the past decade. This progress has been driven in large part by the Atacama Large Millimeter/submillimeter Array (ALMA), which has given us an unprecedented view of solar system bodies themselves, and of the structure and chemistry of forming ...
Katherine de Kleer, Michael E. Brown, Martin Cordiner, Richard Teague   +3 more
wiley   +1 more source

Hydrodynamic Modeling of the Interaction of Winds within a Collapsing Turbulent Gas Cloud

Advances in Astronomy, Volume 2015, Issue 1, 2015., 2015
By using the particle‐based code Gadget2, we follow the evolution of a gas giant molecular cloud, in which a set of gas particles representing the wind are created by a Monte Carlo scheme and suddenly move outwards from the cloud’s center. The particles representing the gas cloud initially have a velocity according to a turbulent spectrum built in a ...
Guillermo Arreaga-García, Julio Saucedo-Morales, William Reach   +2 more
wiley   +1 more source

Atomistic Modeling of Methyl Formate and Glycolaldehyde Formation on Interstellar Dirty Ice Mantles via a “Radical + Ice” Mechanism

ChemPlusChem, Volume 90, Issue 11, November 10, 2025.
The presence of interstellar complex organic molecules (COMs) has been baffling astrochemists for a long time. Methyl formate and glycolaldehyde are widely detected but their abundances mismatch kinetic astrochemical model predictions. Here, the formation of these two COMs is characterized onto a mixed ice surface, highlighting the importance of ...
Jessica Perrero, Stefano Pantaleone, Piero Ugliengo, Albert Rimola   +3 more
wiley   +1 more source