Results 21 to 30 of about 220 (138)

Star Formation: Chemistry as a Probe of Embedded Protostars [PDF]

Proceedings of Frank N. Bash Symposium 2013: New Horizons in Astronomy — PoS(BASH 2013), 2014
The embedded phase of star formation is the crucial phase where most of the stellar mass is assembled. Velocity-resolved spectra reveal an infalling envelope, bipolar outflows, and perhaps an infant circumstellar disk -- all locked together in a cosmic dance of gravitational collapse and magnetic winds.
openaire   +2 more sources

The SOFIA Massive (SOMA) Star Formation Survey. IV. Isolated Protostars

The Astrophysical Journal, 2022
Abstract We present ∼10–40 μm SOFIA-FORCAST images of 11 isolated protostars as part of the SOFIA Massive (SOMA) Star Formation Survey, with this morphological classification based on 37 μm imaging. We develop an automated method to define source aperture size using the gradient of its background-subtracted enclosed flux and apply this ...
Rubén Fedriani, Jonathan C. Tan, Zoie Telkamp, Yichen Zhang, Yao-Lun Yang, Mengyao Liu, James M. De Buizer, Chi-Yan Law, Maria T. Beltran, Viviana Rosero, Kei E. I. Tanaka, Giuliana Cosentino, Prasanta Gorai, Juan Farias, Jan E. Staff, Barbara Whitney   +15 more
openaire   +3 more sources

EFFECTS OF TURBULENCE ON COSMIC RAY PROPAGATION IN PROTOSTARS AND YOUNG STAR/DISK SYSTEMS [PDF]

The Astrophysical Journal, 2014
The magnetic fields associated with young stellar objects are expected to have an hour-glass geometry, i.e., the magnetic field lines are pinched as they thread the equatorial plane surrounding the forming star but merge smoothly onto a background field at large distances.
Marco Fatuzzo, Fred C. Adams
openaire   +2 more sources

The HH 24 Complex: Jets, Multiple Star Formation, and Orphaned Protostars

The Astronomical Journal, 2023
Abstract The HH 24 complex harbors five collimated jets emanating from a small protostellar multiple system. We have carried out a multiwavelength study of the jets, their driving sources, and the cloud core hosting the embedded stellar system, based on data from the Hubble Space Telescope, Gemini, Subaru, Apache Point Observatory 3.5 m,
Bo Reipurth, J. Bally, Hsi-Wei Yen, H. G. Arce, L.-F. Rodríguez, A. C. Raga, T. R. Geballe, R. Rao, F. Comerón, S. Mikkola, C. A. Aspin, J. Walawender   +11 more
openaire   +3 more sources

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

Asian Pacific Association of Gastroenterology (APAGE) Clinical Practice Guidelines on the Use of Small Molecules and IL‐23 p19 Inhibitors in Ulcerative Colitis and Crohn's Disease

Journal of Gastroenterology and Hepatology, Volume 41, Issue 7, Page 2006-2029, July 2026.
ABSTRACT Ulcerative colitis (UC) and Crohn's disease (CD) are increasingly prevalent in the Asia Pacific region, necessitating updated, region‐specific guidance on advanced therapies. Targeted small molecule agents, such as filgotinib, tofacitinib, upadacitinib, etrasimod, and ozanimod; and the IL‐23 p19 inhibitors (guselkumab, mirikizumab ...
Choon Jin Ooi, Khoon Lin Ling, Julajak Limsrivilai, Shu‐Chen Wei, Joyce Wing Yan Mak, Taku Kobayashi, Luan Minh Dang, Rupert W. Leong, Huiyu Lin, Meng‐Tzu Weng, Wan Chee Ong, Vineet Ahuja, Satimai Aniwan, Ryota Hokari, Wei Jie Jonathan Lee, Alex Hwong‐Ruey Leow, Wai‐Keung Leung, Wee‐Chian Lim, Govind Makharia, Katsuyoshi Matsuoka, Nazri Mustaffa, Siew‐Chien Ng, Mathew Philip, Pises Pisespongsa, Raja Affendi Raja Ali, Zhi Hua Ran, Marcellus Simadibrata, Jose Sollano, Malcolm Tan, Hang Dao Viet, Nik Razima Wan Ibrahim, Kai Chun Wu, Byong Duk Ye, Ida Hilmi, Asian Pacific Association of Gastroenterology (APAGE) Inflammatory Bowel Disease Committee and Asian Education Network in IBD (AEN‐IBD)   +34 more
wiley   +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

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

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