Results 61 to 70 of about 9,190 (204)

Anomalous Microwave Emission from Star Forming Regions

Advances in Astronomy, Volume 2013, Issue 1, 2013., 2013
The evidence for microwave emission from spinning dust grains has been strengthened considerably by its detection in a number of discrete astrophysical objects associated with star formation. These detections, in combination with statistical constraints on its presence on large angular scales in the diffuse ISM, have provided strong observational ...
Anna M. M. Scaife, Laurent Verstraete
wiley   +1 more source

Multiple Outflows around a Single Protostar IRAS 15398−3359

The Astrophysical Journal
We present the results of our mosaic observations of a single Class 0 protostar IRAS 15398−3359 with the Atacama Compact Array in the CO J = 2–1 line.
Jinshi Sai, Hsi-Wei Yen, Masahiro N. Machida, Nagayoshi Ohashi, Yusuke Aso, Anaëlle J. Maury, Sébastien Maret   +6 more
doaj   +1 more source

Unveiling a Few Astronomical Unit Scale Rotation Structure around the Protostar in B335

Astrophysical Journal, 2019
We report a kinematic structure in the innermost envelope of the low-mass Class 0 protostar IRAS 19347+0727 in the Bok globule B335 observed at the best angular resolution ever achieved for this source with ALMA.
M. Imai, Y. Oya, N. Sakai, A. López-Sepulcre, Yoshimasa Watanabe, S. Yamamoto   +5 more
semanticscholar   +1 more source

ALMA Observations of the Protostar L1527 IRS: Probing Details of the Disk and the Envelope Structures [PDF]

, 2017
We have recently observed the Class 0/I protostar L1527 IRS using the Atacama Large Millimeter/submillimeter Array (ALMA) during its Cycle 1 in 220 GHz dust continuum and C18O ( J = 2 − 1 ) line emissions with a ∼2 times higher angular resolution ( ∼ 0 .″
Yusuke Aso, N. Ohashi, Y. Aikawa, M. Machida, K. Saigo, M. Saito, S. Takakuwa, K. Tomida, K. Tomisaka, Hsi-Wei Yen   +9 more
semanticscholar   +1 more source

Incorporation of 36Cl into Calcium‐Aluminum‐Rich Inclusions in the Solar Wind Implantation Model

Advances in Astronomy, Volume 2013, Issue 1, 2013., 2013
We consider the short‐lived radionuclide (SLR) 36Cl in calcium‐aluminum‐rich inclusions (CAIs) found in primitive meteorites with the solar wind implantation model. In this model, SLRs are produced via nuclear reaction with solar energetic particles (SEPs) interacting with gaseous targets in the protosolar atmosphere in T‐Tauri stars.
Glynn E. Bricker, Marc W. Caffee, Alberto J. Castro-Tirado   +2 more
wiley   +1 more source

Connecting a Magnetized Disk to a Convective Low-mass Protostar: A Global 3D Model of Boundary Layer Accretion

The Astrophysical Journal
In the early stages of star formation, boundary layer accretion, where protostars accrete material from disks extending down to their surfaces, plays a crucial role.
Shinsuke Takasao, Takashi Hosokawa, Kengo Tomida, Kazunari Iwasaki   +3 more
doaj   +1 more source

MISALIGNED DISKS IN THE BINARY PROTOSTAR IRS 43 [PDF]

, 2016
Recent high angular resolution ( ) ALMA observations of the 1.1 mm continuum and of HCO+ J = 3–2 and HCN J = 3–2 gas toward the binary protostar IRS 43 reveal multiple Keplerian disks that are significantly misaligned ( ), both in inclination and ...
C. Brinch, J. Jørgensen, M. Hogerheijde, R. Nelson, O. Gressel   +4 more
semanticscholar   +1 more source

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

Astrochemical Diagnostics of the Isolated Massive Protostar G28.20-0.05

The Astrophysical Journal
We study the astrochemical diagnostics of the isolated massive protostar G28.20-0.05. We analyze data from Atacama Large Millimeter/submillimeter Array 1.3 mm observations with a resolution of 0.″2 (∼1000 au). We detect emission from a wealth of species,
Prasanta Gorai, Chi-Yan Law, Jonathan C. Tan, Yichen Zhang, Rubén Fedriani, Kei E. I. Tanaka, Mélisse Bonfand, Giuliana Cosentino, Diego Mardones, Maria T. Beltrán, Guido Garay   +10 more
doaj   +1 more source

The ALMA-PILS survey: detection of CH3NCO towards the low-mass protostar IRAS 16293−2422 and laboratory constraints on its formation [PDF]

, 2017
Methyl isocyanate (CH3NCO) belongs to a select group of interstellar molecules considered to be relevant precursors in the formation of larger organic compounds, including those with peptide bonds.
N. Ligterink, A. Coutens, V. Kofman, H. S. P. Müller, R. Garrod, H. Calcutt, S. Wampfler, J. Jørgensen, H. Linnartz, E. V. Dishoeck, E. V. Dishoeck   +10 more
semanticscholar   +1 more source