Results 81 to 90 of about 35,391 (195)

Gas phase atomic metals in the circumstellar envelope of IRC+10216

, 2010
We report the results of a search for gas phase atomic metals in the circumstellar envelope of the AGB carbon star IRC+10216. The search was made using high resolution (R=50000) optical absorption spectroscopy of a backgound star that probes the envelope
Chaffee, Cherchneff, Coelho, Cordiner, Cox, Delgado Inglada, Dunbar, Field, Gilman, Glassgold, Highberger, Huggins, Huggins, Huggins, Jura, Kendall, Keyes, Kingdon, Kwan, Lafont, Lodders, Lodders, Loup, Martin, Mauron, Mauron, Mauron, McCabe, Middlemass, Morris, Morton, Morton, N. Mauron, Olofsson, P. J. Huggins, Péquignot, Ramstedt, Savage, Schöier, Tsuji, Turner, Young, Zhang, Ziurys, Ziurys, Ziurys, Ziurys   +46 more
core   +1 more source

Origin of Life

, 2012
The evolution of life has been a big enigma despite rapid advancements in the fields of biochemistry, astrobiology, and astrophysics in recent years.
A. Gibbons, Ashwini Kumar Lal, C. Bohler, C. Chyba, C. Huber, C.E. Manning, C.J. Salter, D. Penny, D. Warmflash, D.S. Heckman, D.S. Mckay, E.G. Roussel, F. Hoyle, F. Hoyle, F. Hoyle, G.F. Joyce, H.C. Arp, H.C. Urey, J. Li, J. Maddox, J. Postgate, J.B.S. Haldane, J.K. Fredrickson, J.V. Narlikar, J.W. Schopf, K. Kvenvolden, L.-H. Lin, L.E. Orgel, L.J. Richardson, M.T. Mondigan, N.C. Wickramsinghe, P. David, P. Ehrenfreund, P. Senapathy, R. Shapiro, R.D. Lorenz, S Arrhenius, S.J. Mojzsis, S.L. Miller, S.L. Miller, Stofan, T. Brock, T.D. Brack, W. Gilbert, W. Martin, Y.-J. Kuan, Y.-J. Ma   +46 more
core   +1 more source

Interstellar HOCN in the Galactic center region

, 2010
Aims. Our aim is to confirm the interstellar detection of cyanic acid, HOCN, in the Galactic center clouds. It has previously been tentatively detected only in Sgr B2(OH). Methods.
Belloche, A., Bruenken, S., Martin, S., Menten, K. M., Verheyen, L.   +4 more
core   +1 more source

Binding Energies of Interstellar Complex Organic Molecules on Water Ice Surfaces: A Quantum Chemical Investigation

The Astrophysical Journal
Interstellar dust grains are enveloped by ices of frozen molecules in cold, dense regions of the interstellar medium (ISM), which are also observed in the gas phase. Whether a species is in the solid or gaseous state is governed by its binding energy (BE)
Harjasnoor Kakkar, Berta Martínez-Bachs, Cecilia Ceccarelli, Piero Ugliengo, Albert Rimola   +4 more
doaj   +1 more source

Scientific returns from a program of space missions to comets [PDF]

A program of cometary missions is proposed. The nature and size of interstellar dust, its origin and evolution; identification of new interstellar molecules; clarification of interstellar chemistry; accretion of grains into protosolar cometesimals; role ...
Delsemme, A. H.
core   +1 more source

Interstellar grain mantles [PDF]

Interstellar molecular grain mantles are an important component of the interstellar dust inside dense molecular clouds as evidenced by the detection of absorption bands at 2.97, 3.08, 4.61, 6.0 and 6.8 microns.
Allamandola, Louis J., Bregman, J., Tielens, Alexander G. G. M., Witteborn, F. C.   +3 more
core   +1 more source

Boundary conditions for the paleoenvironment: Chemical and physical processes in the pre-solar nebula [PDF]

Detailed study of the first interstellar hydrocarbon ring, cyclopropenylidene (C3H2), is continuing. The singly deuterated isotope of this molecule, C3HD, was observed in several cold interstellar clouds.
Irvine, William M., Schloerb, F. Peter
core   +1 more source

Fingerprinting fragments of fragile interstellar molecules: dissociation chemistry of pyridine and benzonitrile revealed by infrared spectroscopy and theory.

Faraday Discuss, 2023
Rap DB, Simon A, Steenbakkers K, Schrauwen JGM, Redlich B, Brünken S.   +5 more
europepmc   +1 more source

Spectroscopic Identification and Photochemistry of Astrochemically Relevant Phosphorus-bearing Molecules [O, C, N, P] and [2O, C, N, P]

The Astrophysical Journal
Diatomic molecules phosphorus monoxide (PO) and phosphorus mononitride (PN) are the main reservoirs of gas-phase phosphorus in interstellar and circumstellar environments, indicating the possibility of forming new phosphorus-bearing molecules through ...
Bifeng Zhu, Minghao Wang, Junjie Jiang, Ningjing Jiang, Jingling Hong, Guntram Rauhut, Guanjun Wang, Weixing Li, Xiaoqing Zeng   +8 more
doaj   +1 more source

On the Origin of Infrared Bands Attributed to Tryptophan in Spitzer Observations of IC 348

The Astrophysical Journal Letters
Infrared emission features toward interstellar gas of the IC 348 star cluster in Perseus have been recently proposed to originate from the amino acid tryptophan.
Aditya Dhariwal, Thomas H. Speak, Linshan Zeng, Amirhossein Rashidi, Brendan Moore, Olivier Berné, Anthony J. Remijan, Ilane Schroetter, Brett A. McGuire, Víctor M. Rivilla, Arnaud Belloche, Jes K. Jørgensen, Pavle Djuricanin, Takamasa Momose, Ilsa R. Cooke   +14 more
doaj   +1 more source