Results 51 to 60 of about 55,496 (241)

Study of protoplanetary nebulae [PDF]

Proceedings of the International Astronomical Union, 2016
AbstractWe have performed 3D hydrodynamic simulations of a symmetrical jet ejection following previous works (Raga et al. 2009, Riera et al. 2014, Velázquez et al. 2014). The jet is emitted from a binary system in elliptical orbit, and its direction changes describing a precession cone.
D. Estrella, L. Hernández-Martínez, Pablo F. Velázquez, C. A. Raga, Alejandro Esquivel   +4 more
openaire   +1 more source

1'' Resolution Mapping of the Molecular Envelope of the Protoplanetary Nebula CRL 618

, 2004
C. Sánchez Contreras, V. Bujarrabal, A. Castro-Carrizo, J. Alcolea, A. Sargent   +4 more
semanticscholar   +2 more sources

Fast outflows in protoplanetary nebulae and young planetary nebulae observed by Herschel/HIFI [PDF]

Astronomy & Astrophysics, 2021
Context. Fast outflows and their interaction with slow shells (generally known as the fossil circumstellar envelope of asymptotic giant branch stars) play an important role in the structure and kinematics of protoplanetary and planetary nebulae (pPNe, PNe).
Lorenzo, M., Teyssier, R., Bujarrabal, V., García Lario, P., Alcolea, J., Verdugo, E., Marston, A.   +6 more
openaire   +5 more sources

Early science with the Large Millimeter Telescope : molecules in the extreme outflow of a protoplanetary nebula [PDF]

, 2017
Extremely high velocity emission likely related to jets is known to occur in some proto-Planetary Nebulae. However, the molecular complexity of this kinematic component is largely unknown.
A. I. Gómez-Ruiz, L. Guzman-Ramirez, L. Guzman-Ramirez, E. O. Serrano, D. Sánchez-Arguelles, Antoni Bayés de Luna, F. Schloerb, G. Narayanan, M. Yun, R. Sahai, A. Zijlstra, M. Chávez-Dagostino, A. Montaña, D. Hughes, Mónica Rodríguez   +14 more
semanticscholar   +1 more source

Millimetre polarization of the protoplanetary nebula OH 231.8+4.2: a follow-up study with CARMA [PDF]

, 2015
In order to investigate the characteristics and influence of the magnetic field in evolved stars, we performed a follow-up investigation of our previous submillimeter analysis of the proto-planetary nebula (PPN) OH 231.8+4.2 (Sabin et al.
L. Sabin, C. Hull, R. Plambeck, A. Zijlstra, R. V'azquez, S. Navarro, P. F. Guill'en   +6 more
semanticscholar   +1 more source

How unique is the protoplanetary nebula star HR 4049? [PDF]

Symposium - International Astronomical Union, 1987
The late B-supergiant HR 4049 is peculiar in different respects: (1) It is located far from the galactic plane (b = 23°); (2) It is a variable with a large amplitude and on a long time scale (Waelkens and Rufener, 1983); (3) It has a spectacular infrared excess (Lamers et al., 1986).
C. Waelkens, L. B. F. M. Waters
openalex   +2 more sources

Lifetime of the Outer Solar System Nebula From Carbonaceous Chondrites [PDF]

JGR: Planets (2022), 2022
The evolution and lifetime of protoplanetary disks (PPDs) play a central role in the formation and architecture of planetary systems. Astronomical observations suggest that PPDs evolve in two timescales, accreting onto the star for up to several million years (Myr) followed by gas dissipation within <1 Myr.
arxiv   +1 more source

The composition of the protosolar disk and the formation conditions for comets [PDF]

, 2015
Conditions in the protosolar nebula have left their mark in the composition of cometary volatiles, thought to be some of the most pristine material in the solar system.
A. Dutrey, A. Kouchi, A.E. Glassgold, A.G.G.M. Tielens, A.I. Vasyunin, A.L. Cochran, A.N. Heays, A.Z. Dolginov, B. Silvi, B.P. Bonev, B.P. Bonev, B.P. Bonev, C. Alexander, C. Ceccarelli, C. Ceccarelli, C. Ceccarelli, C. Dominik, C. Qi, C. Qi, C. Qi, C. Qi, C. Salyk, C. Tornow, C. Tornow, C. Tornow, C. Walsh, C. Walsh, C.E. Woodward, C.P. Dullemond, D. Bockelée-Morvan, D. Bockelée-Morvan, D. Bockelée-Morvan, D. Bockelée-Morvan, D. Bockelée-Morvan, D. Gautier, D. Harsono, D. Heinzeller, D. Hutsemékers, D. Kozlowski, D. Semenov, D. Semenov, D.C. Lis, E. Gibb, E. Herbst, E. Jehin, E. Lellouch, E. Roueff, E. S. Wirström, E. Zicler, E.D. Young, E.K. Jessberger, E.L. Gibb, E.S. Wirström, E.S. Wirström, F. Hersant, F. Pauzat, F.C. Adams, F.J. Ciesla, F.J. Ciesla, G. Buntkowsky, G. Bussolin, G. Cremonese, G. Kresse, G. Kresse, G. Notesco, G.J. Flynn, G.J. Villanueva, G.L. Villanueva, G.S. Mathews, H. Kawakita, H. Kawakita, H. Kawakita, H. Kawakita, H. Yurimoto, H. Yurimoto, I. Gregorio-Monsalvo de, I. Pater de, I. Pater de, J. Crovisier, J. Crovisier, J. Crovisier, J. Crovisier, J. Crovisier, J. Schönke, J.-E. Lee, J.C. Mottram, J.E. Heidenreich III, J.F. Hawley, J.F. Hawley, J.I. Lunine, J.J. Kavelaars, J.K.J. Fogel, J.P. Perdew, J.R. Lyons, J.R. Najita, J.S. Carr, J.S. Lewis, J.S. Mathis, K. Altwegg, K. France, K. Hashimoto, K. Nagashima, K. Saigo, K. Willacy, K. Willacy, K. Willacy, K. Willacy, K. Willacy, K. Willacy, K.D. McKeegan, K.I. Öberg, K.M. Chick, K.M. Pontoppidan, K.M. Pontoppidan, K.M. Pontoppidan, K.M. Pontoppidan, K.Y. Furuya, L. Pagani, L. Paganini, L. Podio, L.I. Cleeves, L.I. Cleeves, L.I. Cleeves, L.R. Nittler, M. Ali-Dib, M. Ali-Dib, M. Asplund, M. Calatayud, M. Doronin, M. Hassig, M. Ilgner, M. Ilgner, M. Ilgner, M. Pettini, M.A. DiSanti, M.F. A’Hearn, M.J. Mumma, M.J. Mumma, M.J. Mumma, M.R. Hogerheijde, M.V. Persson, N. Biver, N. Dello Russo, N. Dello Russo, N. Dello Russo, N. Fray, N. Iro, N. Watanabe, N.J. Turner, N.J. Turner, N.J. Turner, O. Mousis, O. Mousis, O. Mousis, O. Mousis, O. Mousis, O. Mousis, O. Mousis, O. Mousis, O. Mousis, O. Mousis, O. Mousis, P. Caselli, P. D’Alessio, P. Eberhardt, P. Eberhardt, P. Gast, P. Hartogh, P. Theulé, P.M. Woods, P.M. Woods, R. Hueso, R. Llusar, R. Meier, R. Meier, R. Visser, R. Visser, R. Visser, R.N. Clayton, R.N. Clayton, S. B. Charnley, S. Casassa, S. Casassa, S. Grimme, S. Gulkis, S. Inutsuka, S. N. Milam, S. Wyckoff, S.A. Balbus, S.B. Charnley, S.B. Charnley, S.B. Charnley, S.B. Charnley, S.B. Charnley, S.D. Rodgers, S.E. Dodson-Robinson, T. Albertsson, T. Albertsson, T. Albertsson, T. Bredichin, T. Hama, T. Lee, T. Owen, T.J. Millar, Th. Henning, U. Marboeuf, U. Marboeuf, U. Marboeuf, V. Akimkin, V. Taquet, V. Taquet, V. Wakelam, V. Zubko, W.-H. Ip, W.D. Langer, W.M. Irvine, Y. Aikawa, Y. Aikawa, Y. Aikawa, Y. Aikawa, Y. Aikawa, Y. Aikawa, Y. Alibert, Y. Alibert, Y. Ellinger, Y. Ellinger, Y. Shinnaka, Y.L. Radeva   +227 more
core   +3 more sources

Accretion of dust by chondrules in a MHD-turbulent solar nebula [PDF]

, 2010
(Abridged) Numerical magnetohydrodynamic (MHD) simulations of a turbulent solar nebula are used to study the growth of dust mantles swept up by chondrules. A small neighborhood of the solar nebula is represented by an orbiting patch of gas at a radius of
Armitage, Augusto Carballido, Balbus, Carballido, Carballido, Ciesla, Ciesla, Cuzzi, Cuzzi, Cuzzi, Cuzzi, Fleming, Fromang, Güttler, Hartmann, Hawley, Krot, Leinhardt, Metzler, Morfill, Ormel, Ormel, Rubin, Shakura, Shu, Stone, Stone, Stone, Trigo-Rodrı´guez, Turner, Turner, Weidenschilling, Zsom, Zsom   +33 more
core   +1 more source

Enstatite chondrites: condensation and metamorphism under extremely reducing conditions and contributions to the Earth

Progress in Earth and Planetary Science, 2022
Enstatite chondrites are a small clan of meteorites, only ~ 1% out of all meteorite collection. However, they are the most reduced meteorites and have almost identical isotopic compositions to those of the Earth, suggestive of significant contributions ...
Yangting Lin
doaj   +1 more source