Results 21 to 30 of about 9,190 (204)

FAUST I. The hot corino at the heart of the prototypical Class I protostar L1551 IRS5 [PDF]

Monthly Notices of the Royal Astronomical Society: Letters, 2020
The study of hot corinos in solar-like protostars has been so far mostly limited to the Class 0 phase, hampering our understanding of their origin and evolution.
Eugenio Bianchi, C. Chandler, C. Ceccarelli, C. Codella, N. Sakai, A. L'opez-Sepulcre, L. Maud, G. Moellenbrock, B. Svoboda, Y. Watanabe, T. Sakai, F. M'enard, Y. Aikawa, F. Alves, N. Balucani, M. Bouvier, P. Caselli, E. Caux, S. Charnley, S. Choudhury, M. Simone, F. Dulieu, A. Dur'an, L. Evans, C. Favre, D. Fedele, S. Feng, F. Fontani, L. Francis, T. Hama, T. Hanawa, E. Herbst, T. Hirota, M. Imai, A. Isella, I. Jim'enez-Serra, D. Johnstone, C. Kahane, B. Lefloch, L. Loinard, M. Maureira, S. Mercimek, A. Miotello, S. Mori, R. Nakatani, H. Nomura, Y. Oba, S. Ohashi, Y. Okoda, J. Ospina-Zamudio, Y. Oya, J. Pineda, L. Podio, A. Rimola, D. S. Cox, Y. Shirley, V. Taquet, L. Testi, C. Vastel, S. Viti, N. Watanabe, A. Witzel, C. Xue, Y. Zhang, B. Zhao, S. Yamamoto   +65 more
semanticscholar   +1 more source

Bulk mineralogy, water abundance, and hydrogen isotope composition of unequilibrated ordinary chondrites

Meteoritics &Planetary Science, Volume 58, Issue 9, Page 1365-1381, September 2023., 2023
Abstract The origin and transport of water in the early Solar System is an important topic in both astrophysics and planetary science, with applications to protosolar disk evolution, planetary formation, and astrobiology. Of particular interest for understanding primordial water transport are the unequilibrated ordinary chondrites (UOCs), which have ...
Helen Grant, Romain Tartèse, Rhian Jones, Laurette Piani, Yves Marrocchi, Ashley King, Thomas Rigaudier   +6 more
wiley   +1 more source

Loading of Amino Acids onto RNA in a Putative RNA‐Peptide World

Angewandte Chemie International Edition, Volume 62, Issue 21, May 15, 2023., 2023
The loading of RNAs with amino acids constitutes the first step toward RNA‐based peptide synthesis in a putative prebiotic RNA‐peptide world. The efficient loading of RNA strands incorporating N‐methylcarbamoyl nucleotides with a series of amino acids is reported. The loaded RNA strands also underwent RNA‐based amino acid transfer reactions.
Johannes N. Singer, Felix M. Müller, Ewa Węgrzyn, Christina Hölzl, Hans Hurmiz, Chuyi Liu, Luis Escobar, Thomas Carell   +7 more
wiley   +1 more source

The grain size distribution of matrix in primitive chondrites

Meteoritics &Planetary Science, Volume 58, Issue 5, Page 688-704, May 2023., 2023
Abstract The matrix of primitive chondrites is composed of submicron crystals embedded in amorphous silicates. These grains are thought to be the remains of relatively unprocessed dust from the inner regions of the protoplanetary disk. The matrix of primitive meteorites is often compared to chondritic porous interplanetary dust particles (CP‐IDPs ...
E. Vaccaro, P. Wozniakiewicz, I. A. Franchi, N. Starkey, S. S. Russell   +4 more
wiley   +1 more source

Can Protostellar Outflows Set Stellar Masses?

The Astrophysical Journal, 2023
The opening angles of some protostellar outflows appear too narrow to match the expected core–star mass efficiency (SFE) = 0.3–0.5, if the outflow cavity volume traces outflow mass, with a conical shape and a maximum opening angle near 90°.
Philip C. Myers, Michael M. Dunham, Ian W. Stephens   +2 more
doaj   +1 more source

Lifetime of the Outer Solar System Nebula From Carbonaceous Chondrites

Journal of Geophysical Research: Planets, Volume 127, Issue 7, July 2022., 2022
Abstract The evolution and lifetime of protoplanetary disks (PPDs) play a central role in the formation and architecture of planetary systems. Astronomical observations suggest that PPDs evolve in two timescales, accreting onto the star for up to several million years (Myr) followed by gas dissipation within ≲1 Myr. Because solar nebula magnetic fields
Cauê S. Borlina, Benjamin P. Weiss, James F. J. Bryson, Philip J. Armitage   +3 more
wiley   +1 more source

Early Planet Formation in Embedded Disks (eDisk). VII. Keplerian Disk, Disk Substructure, and Accretion Streamers in the Class 0 Protostar IRAS 16544–1604 in CB 68

The Astrophysical Journal, 2023
We present observations of the Class 0 protostar IRAS 16544–1604 in CB 68 from the “Early Planet Formation in Embedded Disks (eDisk)” ALMA Large program. The ALMA observations target continuum and lines at 1.3 mm with an angular resolution of ∼5 au.
Miyu Kido, Shigehisa Takakuwa, Kazuya Saigo, Nagayoshi Ohashi, John J. Tobin, Jes K. Jørgensen, Yuri Aikawa, Yusuke Aso, Frankie J. Encalada, Christian Flores, Sacha Gavino, Itziar de Gregorio-Monsalvo, Ilseung Han, Shingo Hirano, Patrick M. Koch, Woojin Kwon, Shih-Ping Lai, Chang Won Lee, Jeong-Eun Lee, Zhi-Yun Li, Zhe-Yu Daniel Lin, Leslie W. Looney, Shoji Mori, Suchitra Narayanan, Adele L. Plunkett, Nguyen Thi Phuong, Jinshi Sai (Insa Choi), Alejandro Santamaría-Miranda, Rajeeb Sharma, Patrick D. Sheehan, Travis J. Thieme, Kengo Tomida, Merel L. R. van ’t Hoff, Jonathan P. Williams, Yoshihide Yamato, Hsi-Wei Yen   +35 more
doaj   +1 more source

[Retracted] Internet of Things System of Spatial Structure Sports Events Health Monitoring Based on Cloud Computing

Security and Communication Networks, Volume 2022, Issue 1, 2022., 2022
At present, the health monitoring system of world sports events uses the system's on‐site information or periodic test information to evaluate the health of the system. In order to make the data more accurate, the application of cloud computing is necessary.
Rui Feng, Ning Chang, Muhammad Arif
wiley   +1 more source

Sulforaphane and ophthalmic diseases. [PDF]

Food Sci Nutr
Sulforaphane (SFN) is an organosulfur compound categorized as an isothiocyanate (ITC), primarily extracted from cruciferous vegetables like broccoli and cabbage. This review comprehensively outlines recent research on SFN, elucidates its mechanisms of action, and discusses potential therapeutic benefits for eye disorders such as age‐related macular ...
Zhang Y, Zhao X, Liu Y, Yang X.
europepmc   +2 more sources

Gas flow and accretion via spiral streamers and circumstellar disks in a young binary protostar [PDF]

Science, 2019
Gas flows and disks in a young binary Many stars are in binary systems, pairs of stars gravitationally bound to each other, often with the two components having similar masses. It remains unclear how these systems assemble and accrete material.
Felipe O. Alves, Paola Caselli, J. Girart, D. Segura-Cox, Gabriel A. P. Franco, A. Schmiedeke, Bo Zhao   +6 more
semanticscholar   +1 more source