Results 301 to 310 of about 245,593 (320)

Primordial aqueous alteration recorded in water-soluble organic molecules from the carbonaceous asteroid (162173) Ryugu. [PDF]

Nat Commun
Takano Y, Naraoka H, Dworkin JP, Koga T, Sasaki K, Sato H, Oba Y, Ogawa NO, Yoshimura T, Hamase K, Ohkouchi N, Parker ET, Aponte JC, Glavin DP, Furukawa Y, Aoki J, Kano K, Nomura SM, Orthous-Daunay FR, Schmitt-Kopplin P, Hayabusa2-initial-analysis SOM team, Yurimoto H, Nakamura T, Noguchi T, Okazaki R, Yabuta H, Sakamoto K, Yada T, Nishimura M, Nakato A, Miyazaki A, Yogata K, Abe M, Okada T, Usui T, Yoshikawa M, Saiki T, Tanaka S, Terui F, Nakazawa S, Watanabe SI, Tsuda Y, Tachibana S.   +42 more
europepmc   +1 more source

Chemical Aristocracy: He₃ Dication and Analogous Noble-Gas-Exclusive Covalent Compounds. [PDF]

J Phys Chem Lett
Araujo L, Fantuzzi F, Cardozo TM.
europepmc   +1 more source

A nearly terrestrial D/H for comet 67P/Churyumov-Gerasimenko. [PDF]

Sci Adv
Mandt KE, Lustig-Yaeger J, Luspay-Kuti A, Wurz P, Bodewits D, Fuselier SA, Mousis O, Petrinec SM, Trattner KJ.   +8 more
europepmc   +1 more source

Theoretical investigation of the A¹Π-X¹Σ⁺, B¹Σ⁺-X¹Σ⁺, C¹Σ⁺-X¹Σ⁺, and E¹Π-X¹Σ⁺ transitions of the CO molecule.

Phys Chem Chem Phys
Khalil M, Mahmoud S, Brady RP, Almehairbi M, Gacesa M, Yurchenko SN, Tennyson J, Al Ghaferi A, El-Kork N.   +8 more
europepmc   +1 more source

Identification of a turnover in the initial mass function of a young stellar cluster down to 0.5 MJ

De Furio M, Meyer M, Greene T, Hodapp K, Johnstone D, Leisenring J, Rieke M, Robberto M, Roellig T, Cugno G, Fiorellino E, Manara C, Raileanu R, Terwisga Sv.   +13 more
europepmc   +1 more source

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The inside-out planetary nebula around a born-again star

Nature Astronomy, 2018
Planetary nebulae are ionized clouds of gas formed by the hydrogen-rich envelopes of low- and intermediate-mass stars ejected at late evolutionary stages.
M. Guerrero, X. Fang, M. M. Miller Bertolami, G. Ramos-Larios, H. Todt, A. Alarie, L. Sabin, L. F. Miranda, C. Morisset, C. Kehrig, S. Zavala   +10 more
semanticscholar   +1 more source

Molecules and solids in planetary nebulae and proto-planetary nebulae

Advances in Space Research, 2007
Abstract Recent millimeter-wave and infrared spectroscopic observations have identified a large number of organic molecules through their rotational and vibrational transitions. In particular, the detections of the stretching and bending modes of aliphatic and aromatic compounds have revealed a continuous synthesis of organic materials at the late ...
openaire   +4 more sources

Planetary Nebulae

1996
This review summarizes spectroscopic and imaging results obtained on board the Infrared Space Observatory (ISO) on well-known planetary nebulae: the young nebula NGC 7027, and two fully evolved nearby nebulae, the Dumbbell and the Helix.
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Shaping Planetary Nebulae

Astrophysics and Space Science, 1994
Hydrodynamical calculations are becoming increasingly successful at understanding the shapes and kinematics of planetary nebulae (PNs). The most successful models are two-dimensional interacting stellar wind models for which the PN nucleus is assumed to originally expel much or most of its mass in an equatorial waistband.
openaire   +2 more sources

CO in Planetary Nebulae and Proto-Planetary Nebulae

1997
The evolution between the asymptotic giant branch (AGB) and the planetary nebula (PN) phases has long been a “missing link” in our understanding of stellar evolution. Through the study of cool IRAS sources, an increasing number of transition objects, or “proto-planetary nebulae”, has now been identified.
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