Results 151 to 160 of about 301,064 (245)

86th Annual Meeting of the Meteoritical Society (2024)

Meteoritics &Planetary Science, Volume 59, Issue S1, Page A1-A468, August 2024.
wiley   +1 more source

Dance to Demise—How Massive Stars May Form Dense Circumstellar Shells before Explosion

The Astrophysical Journal
We investigate the evolution of red supergiant (RSG) progenitors of core-collapse supernovae (SNe) with initial masses between 12 and 20 M _⊙ , focusing on the effects of enhanced mass loss due to pulsation-driven instabilities in their envelopes and ...
Sutirtha Sengupta, Das Sujit, Arkaprabha Sarangi   +2 more
doaj   +1 more source

Phosphorus-bearing molecules PO and PN at the edge of the Galaxy. [PDF]

Nature, 2023
Koelemay LA, Gold KR, Ziurys LM.
europepmc   +1 more source

Unconventional gas-phase preparation of the prototype polycyclic aromatic hydrocarbon naphthalene (C₁₀H₈) via the reaction of benzyl (C₇H₇) and propargyl (C₃H₃) radicals coupled with hydrogen-atom assisted isomerization. [PDF]

Chem Sci, 2023
He C, Kaiser RI, Lu W, Ahmed M, Krasnoukhov VS, Pivovarov PS, Zagidullin MV, Azyazov VN, Morozov AN, Mebel AM.   +9 more
europepmc   +1 more source

Calcium Chemistry in Carbon-rich Circumstellar Environments: The Laboratory and Astronomical Discovery of Calcium Dicarbide, CaC2

The Astrophysical Journal Letters
Calcium dicarbide, CaC _2 , has been characterized at high resolution in the laboratory, and its main isotopologue, ^40 CaC _2 , has been assigned to 14 rotational emission lines between 14 and 115 GHz, including 12 previously unassigned lines, in the ...
H. Gupta, P. B. Changala, J. Cernicharo, J. R. Pardo, M. Agúndez, C. Cabezas, B. Tercero, M. Guélin, M. C. McCarthy   +8 more
doaj   +1 more source

Locating extrema on the potential energy surface of a reacting system methyl and fluorenyl via quantum chemical methods

Вестник Самарского университета: Естественнонаучная серия
The study of aromatic and resonance-stabilized radicals reaction mechanisms has a key importance for understanding the processes of molecular mass growth of polycyclic aromatic hydrocarbons (PAHs) and carbon nanoparticles in various astrophysical ...
V. S. Krasnoukhov, P. S. Pivovarov, V. N. Azyazov   +2 more
doaj   +1 more source

Disk in the Circumstellar Envelope of Carbon Mira V Cygni

The Astronomical Journal
Asymptotic giant branch (AGB) stars are the primary source of dust and complex molecules in the interstellar medium. The determination of outflow parameters is often hindered by the unknown geometry of the circumstellar environment, creating a demand for
Boris S. Safonov, Sergey G. Zheltoukhov, Andrey M. Tatarnikov, Ivan A. Strakhov, Victor I. Shenavrin   +4 more
doaj   +1 more source

The Protostars in Orion: Characterizing the Properties of Their Magnetized Envelopes

The Astrophysical Journal
We present a study connecting the physical properties of protostellar envelopes to the morphology of the envelope-scale magnetic field. We used the Atacama Large Millimeter/submillimeter Array (ALMA) polarization observations of 61 young protostars at 0 ...
Bo Huang, Josep M. Girart, Ian W. Stephens, Manuel Fernández López, Philip C. Myers, Qizhou Zhang, John J. Tobin, Paulo Cortes, Nadia M. Murillo, Sarah Sadavoy, Hector G. Arce, John M. Carpenter, Woojin Kwon, Valentin J. M. Le Gouellec, Zhi-Yun Li, Leslie W. Looney, Tom Megeath, Erin G. Cox, Nicole Karnath, Dominique Segura-Cox   +19 more
doaj   +1 more source

Investigating Asymmetry Development from SiO to H2O Maser Regions in VX Sagittarii

The Astronomical Journal
Simultaneous very-long-baseline interferometry monitoring observations of H _2 O and SiO masers toward VX Sagittarii were conducted from 2014 February to 2019 January.
Dong-Hwan Yoon, Se-Hyung Cho, Youngjoo Yun, Haneul Yang, Jaeheon Kim   +4 more
doaj   +1 more source

The mystery of unidentified infrared emission bands. [PDF]

Astrophys Space Sci, 2022
Kwok S.
europepmc   +1 more source