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pro vyhledávání: '"Protoplanetary nebula"'
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Publikováno v:
ApJS, 2022, 259, 56
We present observations of the carbon-rich protoplanetary nebula (PPN) CRL 2688 made with the Institut de Radioastronomie Millimetrique (IRAM) 30 m telescope in the 3mm and 2mm bands. In total, 196 transition lines belonging to 38 molecular species a
Externí odkaz:
http://arxiv.org/abs/2204.02796
We present UV spectra of the protoplanetary nebula (pPN) Hen3-1475 obtained with the Space Telescope Imaging Spectrograph (STIS) on board the Hubble Space Telescope (HST). Our deep, low-dispersion spectroscopy enables monochromatic imaging of Hen3-14
Externí odkaz:
http://arxiv.org/abs/1810.00634
Autor:
Sabin, L., Hull, C. L. H., Plambeck, R. L., Zijlstra, A. A., Vázquez, R., Navarro, S. G., Guillén, P. F.
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. 2014), this
Externí odkaz:
http://arxiv.org/abs/1503.00636
We propose an asymmetrical jet ejection mechanism in order to model the mirror symmetry observed in the lobe distribution of some protoplanetary nebulae (pPNe), such as the pPN CRL 618. 3D hydrodynamical simulations of a precessing jet launched from
Externí odkaz:
http://arxiv.org/abs/1408.4699
Autor:
Bujarrabal, V., Alcolea, J., Soria-Ruiz, R., Planesas, P., Teyssier, D., Marston, A. P., Cernicharo, J., Decin, L., Dominik, C., Justtanont, K., de Koter, A., Melnick, G., Menten, K. M., Neufeld, D. A., Olofsson, H., Schmidt, M., Schoier, F. L., Szczerba, R., Waters, L. B. F. M., Quintana-Lacaci, G., Gusten, R., Gallego, J. D., Diez-Gonzalez, M. C., Barcia, A., Lopez-Fernandez, I., Wildeman, K., Tielens, A. G. G. M., Jacobs, K.
We performed Herschel/HIFI observations of several CO lines in the far-infrared/sub-mm in the protoplanetary nebula CRL618. The high spectral resolution provided by HIFI allows measurement of the line profiles. Since the dynamics and structure of the
Externí odkaz:
http://arxiv.org/abs/1007.1570
Publikováno v:
Astrophys.J.687:1432-1447,2008
We outline a scenario which traces a direct path from freely-floating nebula particles to the first 10-100km-sized bodies in the terrestrial planet region, producing planetesimals which have properties matching those of primitive meteorite parent bod
Externí odkaz:
http://arxiv.org/abs/0804.3526
Size-selective concentration of particles in a weakly turbulent protoplanetary nebula may be responsible for the initial collection of chondrules and other constituents into primitive body precursors. This paper presents the main elements of this pro
Externí odkaz:
http://arxiv.org/abs/astro-ph/0009210
Autor:
Chiang, E.
Gravitational instability of a vertically thin, dusty sheet near the midplane of a protoplanetary disk has long been proposed as a way of forming planetesimals. Before Roche densities can be achieved, however, the dust-rich layer, sandwiched from abo
Externí odkaz:
http://arxiv.org/abs/0711.4349
OH 231.8+4.2 is a well studied preplanetary nebula (pPN) around a binary stellar system that shows a remarkable bipolar outflow. To study the structure and kinematics of the inner 10-80 AU nebular regions we performed high-resolution observations of
Externí odkaz:
http://arxiv.org/abs/0704.2166