Results 51 to 60 of about 3,519 (205)

The environmental imprint on molecular layering in the dusty streamer of M512

Astronomy & Astrophysics
Protostellar streamers are elongated structures that channel material from larger scale onto disks, influencing their physical and chemical evolution. The M512 protostar in Orion/Lynds 1641 hosts one of the most massive and extended streamer discovered ...
De Simone M., Cacciapuoti L., Capela D., Macias E., Podio L., Miotello A., Gupta A., Bae J., Grant S., Espaillat C.   +9 more
doaj   +1 more source

Luminosity Outburst of a High-mass Young Stellar Object Triggered by the Surrounding Radiation Field

The Astrophysical Journal Letters, 2023
We present observations of the 6.7 GHz methanol and 4.8 GHz formaldehyde masers toward the high-mass young stellar object G24.33+0.14 (hereafter G24). Our observations were conducted from 2019 to 2021 using the Shanghai Tianma 65 m Radio Telescope and ...
Jun-Ting Liu, Xi Chen, Xiao-Dian Chen, Zhi-Wei Chen, Shi-Min Song, You-Xin Wang, Yan-Kun Zhang, Zhang Zhao, Bin Li, Bo Xia, Zhi-Qiang Shen   +10 more
doaj   +1 more source

DETECTION OF INFALL IN THE PROTOSTAR B335 WITH ALMA [PDF]

The Astrophysical Journal, 2015
11 pages, 5 figures, ApJ in ...
Neal J. Evans, James Di Francesco, Jeong-Eun Lee, Jes K. Jørgensen, Minho Choi, Philip C. Myers, Diego Mardones   +6 more
openaire   +6 more sources

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

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

Heavy water around the L1448-mm protostar

, 2010
International audienceContext. L1448-mm is the prototype of a low-mass Class 0 protostar driving a high-velocity jet. Given its bright H2O spectra observed with ISO, L1448-mm is an ideal laboratory to observe heavy water (HDO) emission.Aims.
B. Lefloch, Cernicharo, J., Bachiller, R., Lefloch, B., A. Fuente, Codella, C., R. Bachiller, C. Ceccarelli, Nisini, B., J. Cernicharo, F. Gueth, C. Codella, B. Nisini, Ceccarelli, C., Gueth, F., Fuente, A.   +15 more
core   +1 more source

ProtoStar: Generic Efficient Accumulation/Folding for Special Sound Protocols [PDF]

, 2023
Accumulation is a simple yet powerful primitive that enables incrementally verifiable computation (IVC) without the need for recursive SNARKs. We provide a generic, efficient accumulation (or folding) scheme for any $(2k-1)$-move special-sound protocol ...
Binyi Chen, Benedikt Bünz
core   +1 more source

CH3OH Thermal Lines Traces 6.7 GHz CH3OH Maser Variation of High-mass Protostar G353.273+0.641

The Astrophysical Journal
This study reports an analysis of the 6.7 GHz CH _3 OH maser in the high-mass protostar G353.273+0.641 (G353), utilizing data from the Tianma Radio Telescope.
Shi-Min Song, Xi Chen, Sheng-Yuan Liu, Jun-Ting Liu   +3 more
doaj   +1 more source

Physicochemical Constraints on the Abiotic Polymerization of Nucleotides Into RNA

Journal of Geophysical Research: Biogeosciences, Volume 130, Issue 11, November 2025.
Abstract One of the key steps in the origin of life is the polymerization of nucleotides into nucleic acids like RNA. We have quantified the energetic impact of temperature, pressure, and composition on the polymerization of nucleotides into RNA using the Gibbs function. These Gibbs energies have been used to calculate the probability that a nucleotide
D. E. LaRowe, J. M. Dick
wiley   +1 more source

Rotational Spectroscopy of the Acetone‐Water Complex: Large Amplitude Motions

ChemPhysChem, Volume 25, Issue 21, November 4, 2024.
The structure and dynamics of the acetone‐water complex were explored using jet‐cooled rotational spectroscopy and computational chemistry calculations. Our detailed rot‐tunneling analyses of acetone‐H2O and −D2O revealed that the interaction with water disrupts the equivalence of the two methyl rotors, resulting in a significantly lower methyl rotor ...
Jiao Gao, Colton D. Carlson, Javix Thomas, Yunjie Xu, Wolfgang Jäger   +4 more
wiley   +1 more source