Results 71 to 80 of about 376,241 (261)

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. Eisner, H. Arce, N. Ballering, J. Bally, S. Andrews, R. Boyden, J. Francesco, M. Fang, D. Johnstone, J. Kim, R. Mann, B. Matthews, I. Pascucci, L. Ricci, P. Sheehan, J. Williams   +15 more
semanticscholar   +1 more source

Evolution of PAHs in Protoplanetary Disks [PDF]

EAS Publications Series, 2011
Depending on whom you ask, PAHs are either the smallest dust particles or the largest gas-phase molecules in space. Whether referred to as gas or dust, these PAHs can contain up to 20% of the total cosmic carbon abundance and as such also play an important role in the carbon chemistry of protoplanetary disks.
openaire   +3 more sources

Gas Evolution in Protoplanetary Disks [PDF]

AIP Conference Proceedings, 2009
This article summarizes a Splinter Session at the Cool Stars XV conference in St. Andrews with 3 review and 4 contributed talks. The speakers have discussed various approaches to understand the structure and evolution of the gas component in protoplanetary disks.
Peter Woitke, Bill Dent, Wing-Fai Thi, Bruce Sibthorpe, Ken Rice, Jonathan Williams, Aurora Sicilia-Aguilar, Joanna Brown, Inga Kamp, Ilaria Pascucci, Richard Alexander, Aki Roberge, Eric Stempels   +12 more
openaire   +6 more sources

Shedding Light on the Origin of the Broken Misaligned Circumtriple Disk around GW Ori

The Astrophysical Journal Letters
We revisit the origin of the observed misaligned rings in the circumtriple disk around GW Ori. Previous studies appeared to disagree on whether disk breaking is caused by the differential precession driven in the disk by the triple star system.
Jeremy L. Smallwood, Stephen H. Lubow, Rebecca G. Martin, Rebecca Nealon   +3 more
doaj   +1 more source

The Roles of Dust Growth in the Temperature Evolution and Snow Line Migration in Magnetically Accreting Protoplanetary Disks

The Astrophysical Journal, 2023
The temperature structure of protoplanetary disks provides an important constraint on where in the disks rocky planets like our own form. Recent nonideal magnetohydrodynamical (MHD) simulations have shown that the internal Joule heating associated with ...
Katsushi Kondo, Satoshi Okuzumi, Shoji Mori   +2 more
doaj   +1 more source

Oued Chebeika 002: A new CI1 meteorite linked to outer solar system bodies

Meteoritics &Planetary Science, EarlyView.
Abstract CI1 chondrites are rare meteorites with high scientific value. In fact, they are the most chemically primitive meteorites and show evidence of intense parent‐body aqueous alteration. They also share strong similarities with samples from Ryugu and Bennu asteroids returned by the JAXA Hayabusa2 and NASA's OSIRIS‐REx missions.
J. Gattacceca, M. Gounelle, B. Devouard, J.‐A. Barrat, L. Bonal, A. J. King, C. Maurel, P. Beck, M. Roskosz, J.‐C. Viennet, D. Mukherjee, N. Dauphas, P. R. Heck, T. Yokoyama, K. López García, O. Poch, O. Grauby, C. S. Harrison, V. Vinogradoff, P. Vernazza, S. Tikoo, V. Vidal, P. Rochette, D. AuYang, D. Borschneck, J. Juraszek, B. Clark   +26 more
wiley   +1 more source

The Nitrogen Carrier in Inner Protoplanetary Disks [PDF]

The Astrophysical Journal, 2019
Abstract The dominant reservoirs of elemental nitrogen in protoplanetary disks have not yet been observationally identified. Likely candidates are HCN, NH3, and N2. The relative abundances of these carriers determine the composition of planetesimals as a function of disk radius due to strong differences in their volatility. A significant
Klaus M. Pontoppidan, Colette Salyk, Andrea Banzatti, Geoffrey A. Blake, Catherine Walsh, John H. Lacy, Matthew J. Richter   +6 more
openaire   +6 more sources

Disk formation and structure*

EPJ Web of Conferences, 2015
In this chapter, we cover the formation of protoplanetary disk as a natural byproduct of the gravitational collapse of a slowly rotating, hydrostatic cloud.
Dominik Carsten
doaj   +1 more source

Spiral density waves in a young protoplanetary disk [PDF]

Science, 2016
Gravitational forces are expected to excite spiral density waves in protoplanetary disks, disks of gas and dust orbiting young stars. However, previous observations that showed spiral structure were not able to probe disk midplanes, where most of the ...
L. Pérez, J. Carpenter, S. Andrews, L. Ricci, A. Isella, H. Linz, A. Sargent, D. Wilner, T. Henning, A. Deller, C. Chandler, C. Dullemond, J. Lazio, K. Menten, S. Corder, S. Storm, L. Testi, M. Tazzari, W. Kwon, N. Calvet, J. Greaves, R. Harris, L. Mundy   +22 more
semanticscholar   +1 more source

An overview of the petrography and petrology of particles from aggregate sample from asteroid Bennu

Meteoritics &Planetary Science, Volume 60, Issue 5, Page 979-996, May 2025.
Abstract The OSIRIS‐REx mission returned a sample of regolith from the carbonaceous asteroid Bennu in September 2023. We present preliminary in situ investigations of the petrology and petrography of selected particles ranging in size from 0.5 to 3 mm.
Harold C. Connolly Jr, Dante S. Lauretta, Timothy J. McCoy, Sara S. Russell, Pierre Haenecour, Anjani Polit, Jessica J. Barnes, Thomas J. Zega, Hisayoshi Yurimoto, Noriyuki Kawasaki, Kevin Righter, Guy Libourel, Marc Portail, Vincent Guigoz, Ashley J. King, Lindsay P. Keller, Kathy Thomas‐Keprta, Loan Le, Valarie Tu, Scott A. Eckley, Catherine M. Corrigan, Timothy Gooding, Timothy Rose, Rob Wardell, Soumya Ray, Victoria E. Hamilton, Nicole G. Lunning, Christopher J. Snead, Francis M. McCubbin, Michelle S. Thompson, Rhian H. Jones, Kenneth Domanik, Dolores Hill, Lucas Smith, Iunn J. Ong, Tobias Salge, Natasha Almeida, Catherine Harrison, Helena Bates, Paul Schofield, Ian A. Franchi, Brian H. May, Claudia Manzoni, Andrew J. Ryan, Ronald‐Louis Ballouz, Robert J. Macke, Jason P. Dworkin, Charles C. Lorentson, Kimberly Tait, Erica R. Jawin, Hannah H. Kaplan, Daniella N. DellaGuistina, Kevin J. Walsh, Michael C. Moreau, Heather L. Enos, C. W. V. Wolner, Heather L. Roper, Shogo Tachibana   +57 more
wiley   +1 more source