Results 31 to 40 of about 42,848 (232)

REEXAMINING THE CHEMISTRY IN PROTOPLANETARY NEBULAE: M1-92, COTTON CANDY NEBULA, AND IRAS22036

Proceedings of the 2022 International Symposium on Molecular Spectroscopy, 2022
Katherine J. Gold, L. M. Ziurys, D. R. Schmidt   +2 more
openalex   +3 more sources

Protoplanetary Disk Properties in the Orion Nebula Cluster: Initial Results from Deep, High-resolution ALMA Observations [PDF]

Astrophysical Journal, 2018
We present Atacama Large Millimeter Array 850 μm continuum observations of the Orion Nebula Cluster that provide the highest angular resolution (∼0.″1 ≈ 40 au) and deepest sensitivity (∼0.1 mJy) of the region to date. We mosaicked a field containing ∼225
J. A. Eisner, H. G. Arce, N. P. Ballering, J. Bally, S. M. Andrews, R. D. Boyden, J. Di Francesco, M. Fang, D. Johnstone, J. S. Kim, R. K. Mann, B. Matthews, I. Pascucci, L. Ricci, P. D. Sheehan, J. P. Williams   +15 more
openalex   +3 more sources

Chemistry in Protoplanetary Nebulae [PDF]

Symposium - International Astronomical Union, 1992
We have investigated gas-phase chemistry in a remnant red giant wind, during transition to a planetary nebula, using the interacting stellar winds model. Rapid destruction by UV of most existing molecules is predicted, within ~ 100 yrs of the core star heating up, suggesting that the large molecules in CRL 618 may be destroyed within decades.
D A Howe, T J Millar, D A Williams
openaire   +1 more source

Implications for Chondrule Formation Regions and Solar Nebula Magnetism from Statistical Reanalysis of Chondrule Paleomagnetism

The Planetary Science Journal, 2023
Converging lines of evidence show that protoplanetary disks are complex environments hosting spatial and temporal variability at multiple scales.
Roger R. Fu, Sarah C. Steele, Jacob B. Simon, Richard Teague, Joan Najita, David Rea   +5 more
doaj   +1 more source

Numerical simulations of wind-driven protoplanetary nebula [PDF]

, 2019
I. D. Novikov
openalex   +1 more source

A MOLECULAR LINE SURVEY OF THE CARBON-RICH PROTOPLANETARY NEBULA AFGL 2688 IN THE 3 mm AND 1.3 mm WINDOWS [PDF]

, 2013
We present a spectral line survey of the protoplanetary nebula (PPN) AFGL 2688 in the frequency ranges of 71–111 GHz, 157–160 GHz, and 218–267 GHz using the Arizona Radio Observatory 12 m telescope and the Heinrich Hertz Submillimeter Telescope.
Yong Zhang, Sun Kwok, Jun-ichi Nakashima, Wayne Chau, Dinh-V-Trung   +4 more
openalex   +3 more sources

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, P. F. Velázquez, A. Esquivel, C. A. Raga   +4 more
openaire   +1 more source

The “Water-Fountain Nebula” IRAS 16342−3814: [ITAL]Hubble Space Telescope[/ITAL]/Very Large Array Study of a Bipolar Protoplanetary Nebula [PDF]

, 1999
R. Sahai, P. te Lintel Hekkert, M. Morris, A. A. Zijlstra, L. Likkel   +4 more
openalex   +2 more sources

Formation of the First Planetesimals via the Streaming Instability in Globally Turbulent Protoplanetary Disks?

The Astrophysical Journal, 2023
Using self-consistent models of turbulent particle growth in an evolving protoplanetary nebula of solar composition, we find that recently proposed local metallicity and Stokes number criteria necessary for the streaming instability to generate ...
Paul R. Estrada, Orkan M. Umurhan
doaj   +1 more source

THE SINTERING REGION OF ICY DUST AGGREGATES IN A PROTOPLANETARY NEBULA [PDF]

, 2011
Sin‐iti Sirono
openalex   +2 more sources