Results 111 to 120 of about 42,848 (232)

Common-envelope shaping of planetary nebulae – IV. From protoplanetary to planetary nebula [PDF]

, 2022
Guillermo Garcı́a-Segura, Ronald E. Taam, P. M. Ricker   +2 more
openalex   +1 more source

Multi-polar Structures in Young Planetary and Protoplanetary Nebulae [PDF]

Symposium - International Astronomical Union, 2003
The imaging of young planetary and proto-planetary nebulae (PNe and PPNe) with unprecedented high angular resolution and dynamic range, using the Hubble Space Telescope, has led to the realisation that almost all of these objects are highly aspherical, with complex multipolar morphologies.
openaire   +1 more source

High-resolution Pan-STARRS and SMA Observations of IRAS 23077+6707: A Giant Edge-on Protoplanetary Disk

The Astrophysical Journal Letters
We present resolved images of IRAS 23077+6707 (“Dracula’s Chivito”) in 1.3 mm/225 GHz thermal dust and CO gas emission with the Submillimeter Array (SMA) and optical (0.5–0.8 μ m) scattered light with the Panoramic Survey Telescope and Rapid Response ...
Kristina Monsch, Joshua Bennett Lovell, Ciprian T. Berghea, Gordian Edenhofer, Garrett K. Keating, Sean M. Andrews, Ammar Bayyari, Jeremy J. Drake, David J. Wilner   +8 more
doaj   +1 more source

Molecular Line Observations of the Protoplanetary Nebula, IRAS 19312+1950 [PDF]

, 2003
Shuji Deguchi, Jun‐ichi Nakashima
openalex   +1 more source

Water Ice in the Edge-on Orion Silhouette Disk 114–426 from JWST NIRCam Images

The Astrophysical Journal
We examine images of the protoplanetary disk 114–426 with JWST/NIRCam in 12 bands. This large disk is oriented edge on with a dark midplane flanked by lobes of scattered light.
Nicholas P. Ballering, L. Ilsedore Cleeves, Ryan D. Boyden, Mark J. McCaughrean, Rachel E. Gross, Samuel G. Pearson   +5 more
doaj   +1 more source

Large Fluctuations within 1 au in Protoplanetary Disks

The Astrophysical Journal
Protoplanetary disks are often assumed to change slowly and smoothly during planet formation. Here, we investigate the time evolution of isolated disks subject to viscosity and a disk wind. The viscosity is assumed to increase rapidly at around 900 K due
John Chambers
doaj   +1 more source

Polarization due to dust scattering in the planetary nebula Cn1-1 [PDF]

The peculiar emission-line object Cn1-1 (=HDE330036=PK330+4 degrees 1), classified both as a symbiotic star and as a planetary nebula, was detected by the Infrared Astronomical Satellite (IRAS) as a strong source of far-infrared dust in the system. Bhatt
Bhatt, Harish C.
core   +1 more source

Neutral Carbon in the Protoplanetary Nebulae CRL 618 and CRL 2688 [PDF]

The Astrophysical Journal, 1997
7 pages, LaTex AASTeX macros.
openaire   +2 more sources

Insights on the Formation Conditions of Uranus and Neptune from Their Deep Elemental Compositions

The Planetary Science Journal
This study, placed in the context of the preparation for the Uranus Orbiter Probe mission, aims to predict the bulk volatile compositions of Uranus and Neptune.
Olivier Mousis, Antoine Schneeberger, Thibault Cavalié, Kathleen E. Mandt, Artyom Aguichine, Jonathan I. Lunine, Tom Benest Couzinou, Vincent Hue, Raphaël Moreno   +8 more
doaj   +1 more source

A Simplified Model for an Evolving Protoplanetary Nebula

The Astrophysical Journal, 2003
The dynamical evolution of the protoplanetary nebula is investigated using analytical solutions of the surface density transport equations. Constant and beta viscosity turbulence models are compared with a functional analytical model and the well-known alpha viscosity formulation.
openaire   +1 more source