Results 71 to 80 of about 25,277 (239)

Subarcsecond resolution observations of warm water towards three deeply embedded low-mass protostars [PDF]

, 2012
Water is present during all stages of star formation: as ice in the cold outer parts of protostellar envelopes and dense inner regions of circumstellar disks, and as gas in the envelopes close to the protostars, in the upper layers of circumstellar disks
Attard, Bergin, Bisschop, Blake, Boogert, Bottinelli, Bottinelli, Brinch, Caselli, Ceccarelli, Ceccarelli, Ceccarelli, Cernicharo, Chandler, Charnley, Choi, Desmurs, Di Francesco, Draine, E. F. van Dishoeck, Enoch, Franklin, Fraser, Furuya, Garrod, Gensheimer, Gibb, Girart, Gutermuth, Harwit, Herbst, Herczeg, Hogerheijde, J. K. Jørgensen, Jacq, Jennings, Jørgensen, Jørgensen, Jørgensen, Jørgensen, Jørgensen, Jørgensen, Jørgensen, Jørgensen, Kristensen, Larson, Liseau, Looney, M. V. Persson, Maret, Marvel, Müller, Neufeld, Nisini, Pickett, Pontoppidan, Reipurth, Rodgers, Sandell, Sandell, van der Tak, van Dishoeck, van Dishoeck, Visser, Visser, Wakelam, Watson, Wilson   +67 more
core   +2 more sources

Coevolution of phyllosilicate, carbon, sulfide, and apatite in Ryugu's parent body

Meteoritics &Planetary Science, Volume 59, Issue 8, Page 2073-2096, August 2024.
Abstract We analyzed an asteroid Ryugu sample returned to Earth by JAXA's Hayabusa2 mission using nanoIR, SEM, and TEM microscopy. We identified multiple distinct carbon reservoirs within the phyllosilicate matrix and demonstrate infrared spectral affinities for some of the carbon to insoluble organic matter (IOM).
Zack Gainsforth, Gerardo Dominguez, Kana Amano, Megumi Matsumoto, Yuri Fujioka, Eiichi Kagawa, Tomoki Nakamura, Shogo Tachibana, Tomoyo Morita, Mizuha Kikuiri, Hisayoshi Yurimoto, Takaaki Noguchi, Ryuji Okazaki, Hikaru Yabuta, Hiroshi Naraoka, Kanako Sakamoto, Toru Yada, Masahiro Nishimura, Aiko Nakato, Akiko Miyazaki, Kasumi Yogata, Masano Abe, Tatsuaki Okada, Tomohiro Usui, Makoto Yoshikawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Satoru Nakazawa, Sei‐ichiro Watanabe, Yuichi Tsuda, Hayabusa2 Initial Analysis Stone Team   +31 more
wiley   +1 more source

The JWST-NIRCam View of Sagittarius C. I. Massive Star Formation and Protostellar Outflows

The Astrophysical Journal
We present James Webb Space Telescope (JWST) Near Infrared Camera observations of the massive star-forming molecular cloud Sagittarius C (Sgr C) in the Central Molecular Zone (CMZ).
Samuel Crowe, Rubén Fedriani, Jonathan C. Tan, Alva Kinman, Yichen Zhang, Morten Andersen, Lucía Bravo Ferres, Francisco Nogueras-Lara, Rainer Schödel, John Bally, Adam Ginsburg, Yu Cheng, Yao-Lun Yang, Sarah Kendrew, Chi-Yan Law, Joseph Armstrong, Zhi-Yun Li   +16 more
doaj   +1 more source

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

The Astrophysical Journal, 2022
We present ∼10–40 μ m SOFIA-FORCAST images of 11 isolated protostars as part of the SOFIA Massive (SOMA) Star Formation Survey, with this morphological classification based on 37 μ m imaging.
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
doaj   +1 more source

Star formation in Perseus. IV. Mass dependent evolution of dense cores [PDF]

, 2008
In our SCUBA survey of Perseus, we find that the fraction of protostellar cores increases towards higher masses and the most massive cores are all protostellar.
Fuller, Gary, Hatchell, Jennifer
core   +3 more sources

Limitations of the modified blackbody fit method for determining molecular cloud properties

Astronomische Nachrichten, Volume 345, Issue 4, May 2024.
Abstract Achieving a comprehensive understanding of the star and planet formation process is one of the fundamental tasks of astrophysics, requiring detailed knowledge of the physical conditions during the different phases of this process. During the earliest stages, that is, concerning physical processes in molecular clouds and filaments, the column ...
Niko Zielinski, Sebastian Wolf
wiley   +1 more source

Early Planet Formation in Embedded Disks (eDisk). III. A First High-resolution View of Submillimeter Continuum and Molecular Line Emission toward the Class 0 Protostar L1527 IRS

The Astrophysical Journal, 2023
Studying the physical and chemical conditions of young embedded disks is crucial to constrain the initial conditions for planet formation. Here we present Atacama Large Millimeter/submillimeter Array observations of dust continuum at ∼0.″06 (8 au ...
Merel L. R. van ’t Hoff, John J. Tobin, Zhi-Yun Li, Nagayoshi Ohashi, Jes K. Jørgensen, Zhe-Yu Daniel Lin, Yuri Aikawa, Yusuke Aso, Itziar de Gregorio-Monsalvo, Sacha Gavino, Ilseung Han, Patrick M. Koch, Woojin Kwon, Chang Won Lee, Jeong-Eun Lee, Leslie W. Looney, Suchitra Narayanan, Adele Plunkett, Jinshi Sai (Insa Choi), Alejandro Santamaría-Miranda, Rajeeb Sharma, Patrick D. Sheehan, Shigehisa Takakuwa, Travis J. Thieme, Jonathan P. Williams, Shih-Ping Lai, Nguyen Thi Phuong, Hsi-Wei Yen   +27 more
doaj   +1 more source

METHYL CYANIDE OBSERVATIONS TOWARD MASSIVE PROTOSTARS [PDF]

The Astrophysical Journal Supplement Series, 2013
We report the results of a survey in the CH3CN J= 12-11 transition toward a sample of massive proto-stellar candidates. The observations were carried out with the 10 m Submillimeter telescope on Mount Graham, AZ. We detected this molecular line in 9 out of 21 observed sources. In six cases this is the first detection of this transition.
Araya, E., Bieging, J., Kurtz, S., Hofner, P., Bieging, J., Araya, E., Kurtz, S., Rosero, V., Hofner, P., Rosero, V.   +9 more
openaire   +2 more sources

EVOLUTION OF MASS OUTFLOW IN PROTOSTARS [PDF]

The Astrophysical Journal, 2016
ABSTRACT We have surveyed 84 Class 0, Class I, and flat-spectrum protostars in mid-infrared [Si ii], [Fe ii], and [S i] line emission, and 11 of these in far-infrared [O i] emission. We use the results to derive their mass outflow rates, .
Dan M. Watson, Nuria P. Calvet, William J. Fischer, W. J. Forrest, P. Manoj, S. Thomas Megeath, Gary J. Melnick, Joan Najita, David A. Neufeld, Patrick D. Sheehan, Amelia M. Stutz, John J. Tobin   +11 more
openaire   +2 more sources

JWST Peers into the Class I Protostar TMC1A: Atomic Jet and Spatially Resolved Dissociative Shock Region

The Astrophysical Journal Letters, 2023
Outflows and winds launched from young stars play a crucial role in the evolution of protostars and the early stages of planet formation. However, the specific details of the mechanism behind these phenomena, including how they affect the protoplanetary ...
D. Harsono, P. Bjerkeli, J. P. Ramsey, K. M. Pontoppidan, L. E. Kristensen, J. K. Jørgensen, H. Calcutt, Z-Y. Li, A. Plunkett   +8 more
doaj   +1 more source