Results 111 to 120 of about 1,537 (221)

Prevalence of non-aromatic carbonaceous molecules in the inner regions of circumstellar envelopes. [PDF]

Nat Astron, 2020
Martínez L, Santoro G, Merino P, Accolla M, Lauwaet K, Sobrado J, Sabbah H, Pelaez RJ, Herrero VJ, Tanarro I, Agúndez M, Martín-Jimenez A, Otero R, Ellis GJ, Joblin C, Cernicharo J, Martín-Gago JA.   +16 more
europepmc   +1 more source

The chemical composition of the circumstellar envelopes around yellow hypergiant stars

, 2007
Context.The yellow hypergiant stars (YHGs) are extremely luminous and massive objects whose general properties are poorly known. Only two of this kind of star show massive circumstellar envelopes, IRC +10420 and AFGL 2343.
G. Quintana-Lacaci, J. Alcolea, A. Castro-Carrizo, V. Bujarrabal   +3 more
core   +1 more source

The Chemistry of Cosmic Dust Analogues from C, C₂, and C₂H₂ in C-Rich Circumstellar Envelopes. [PDF]

Astrophys J, 2020
Santoro G, Martínez L, Lauwaet K, Accolla M, Tajuelo-Castilla G, Merino P, Sobrado JM, Peláez RJ, Herrero VJ, Tanarro I, Mayoral ÁL, Agúndez M, Sabbah H, Joblin C, Cernicharo J, Martín-Gago JÁ.   +15 more
europepmc   +1 more source

CONSTRAINTS ON THE GEOMETRY OF CIRCUMSTELLAR ENVELOPES: Optical Interferometric and. . .

, 1997
We have obtained contemporaneous optical interferometry and spectropolarimetry of seven Be stars. The interferometry was done using both continuum and narrow Ha line Ðlters to observe the circumstellar envelope emission.
J. E. Bjorkman, C. A. Hummel, B. L. Babler, J.E. Bjorkman, D. F. Buscher, A. Quirrenbach   +5 more
core  

86th Annual Meeting of the Meteoritical Society (2024)

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

Molecular Line Studies of Circumstellar Envelopes

, 1982
This dissertation addresses several problems in the study of the dusty, gaseous envelopes commonly found around highly evolved stars. Most of the objects observed are M or N giants and are typically long-period variables.
Jewell, Philip Ramer
core  

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

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

Discontinuous Galerkin finite element method for the continuum radiative transfer problem inside axis-symmetric circumstellar envelopes

International audienceContext. The study of the continuum radiative transfer problem inside circumstellar envelopes is both a theoretical and numerical challenge, especially in the frequency-dependent and multi-dimensional case. While approximate methods
Faurobert, Marianne, Faurobert, M., Niccolini, Gilles, M. Faurobert, G. Niccolini, J. Perdigon, Perdigon, J., Niccolini, G., Perdigon, Jérémy   +8 more
core   +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