Results 111 to 120 of about 399,848 (263)

A primitive asteroid that lived fast and died young sampled by a xenolith in the Cold Bokkeveld CM2 carbonaceous chondrite

Meteoritics &Planetary Science, Volume 60, Issue 3, Page 464-483, March 2025.
Abstract Xenoliths in carbonaceous chondrites include lithologies that are unrepresented in the meteorite record and so are a rich source of information on asteroid diversity. Cold Bokkeveld is a CM2 regolith breccia that contains both hydrous and anhydrous lithic clasts. Here, we describe a hydrous clast with a fine‐grained rim.
Martin R. Lee, Cameron J. Floyd, Robin Haller, Sammy Griffin   +3 more
wiley   +1 more source

The Evidence of Radio Polarization Induced by the Radiative Grain Alignment and Self-scattering of Dust Grains in a Protoplanetary Disk [PDF]

, 2017
The mechanisms causing millimeter-wave polarization in protoplanetary disks are under debate. To disentangle the polarization mechanisms, we observe the protoplanetary disk around HL Tau at 3.1 mm with the Atacama Large Millimeter/submillimeter Array ...
A. Kataoka, T. Tsukagoshi, A. Pohl, T. Muto, H. Nagai, I. Stephens, K. Tomisaka, M. Momose   +7 more
semanticscholar   +1 more source

Mid‐infrared detection and characterization of refractory inclusions in CM and CO chondrites: A non‐destructive approach for returned space samples

Meteoritics &Planetary Science, Volume 60, Issue 3, Page 544-569, March 2025.
Abstract Refractory inclusions (RIs) in chondrites are widely used as tracers of early solar system formation conditions. In the context of sample‐return missions, a non‐destructive and non‐invasive analytical tool that can rapidly detect and characterize RIs in space samples during their early phase of study is highly needed.
Jean Charlier, Alice Aléon‐Toppani, Rosario Brunetto, Jérôme Aléon, Ferenc Borondics   +4 more
wiley   +1 more source

FIRST DETECTION OF GAS-PHASE METHANOL IN A PROTOPLANETARY DISK [PDF]

, 2016
The first detection of gas-phase methanol in a protoplanetary disk (TW Hya) is presented. In addition to being one of the largest molecules detected in disks to date, methanol is also the first disk organic molecule with an unambiguous ice chemistry ...
C. Walsh, R. Loomis, K. Öberg, M. Kama, M. V. ’. van ’t Hoff, T. Millar, Y. Aikawa, E. Herbst, S. W. Widicus Weaver, H. Nomura   +9 more
semanticscholar   +1 more source

A Deep Search for Complex Organic Molecules toward the Protoplanetary Disk of V883 Ori

The Astronomical Journal
Complex organic molecules (COMs) in the form of prebiotic molecules are potential building blocks of life. Using Atacama Large Millimeter/submillimeter Array Band 7 observations in spectral scanning mode, we carried out a deep search for COMs within the ...
Abubakar M. A. Fadul, Kamber R. Schwarz, Merel L. R. van ’T Hoff, Jane Huang, Jennifer B. Bergner, Tushar Suhasaria, Jenny K. Calahan   +6 more
doaj   +1 more source

JWST Imaging of Edge-on Protoplanetary Disks. I. Fully Vertically Mixed 10 μm Grains in the Outer Regions of a 1000 au Disk

The Astronomical Journal
Scattered light imaging of protoplanetary disks provides key insights on the geometry and dust properties in the disk surface. Here, we present James Webb Space Telescope (JWST) 2–21 μ m images of a 1000 au radius edge-on protoplanetary disk surrounding ...
Gaspard Duchêne, François Ménard, Karl R. Stapelfeldt, Marion Villenave, Schuyler G. Wolff, Marshall D. Perrin, Christophe Pinte, Ryo Tazaki, Deborah L. Padgett   +8 more
doaj   +1 more source

Formation and evolution of the protoplanetary disk [PDF]

A disk formation model during collapse of the protosolar nebula, yielding a low-mass protoplanetary disk is presented. The following subject areas are covered: (1) circumstellar disks; (2) conditions for the formation of stars with disks; (3) early ...
Makalkin, A. B., Ruzmaikina, Tamara V.
core   +1 more source

Chemistry of Complex Organic Molecules in the V883 Ori Disk Revealed by ALMA Band 3 Observations

The Astronomical Journal
Complex organic molecules (COMs) in protoplanetary disks are key to understanding the origin of volatiles in comets in our solar system, yet the chemistry of COMs in protoplanetary disks remains poorly understood.
Yoshihide Yamato, Shota Notsu, Yuri Aikawa, Yuki Okoda, Hideko Nomura, Nami Sakai   +5 more
doaj   +1 more source

A Method to Constrain the Size of the Protosolar Nebula

, 2012
Observations indicate that the gaseous circumstellar disks around young stars vary significantly in size, ranging from tens to thousands of AU. Models of planet formation depend critically upon the properties of these primordial disks, yet in general it ...
Buie, M. W., Kretke, K. A., Levison, H. F., Morbidelli, A.   +3 more
core   +3 more sources

MINDS. JWST/MIRI Reveals a Dynamic Gas-rich Inner Disk inside the Cavity of SY Cha

The Astrophysical Journal
SY Cha is a T Tauri star surrounded by a protoplanetary disk with a large cavity seen in the millimeter continuum but has the spectral energy distribution of a full disk.
Kamber R. Schwarz, Thomas Henning, Valentin Christiaens, Danny Gasman, Matthias Samland, Giulia Perotti, Hyerin Jang, Sierra L. Grant, Benoît Tabone, Maria Morales-Calderón, Inga Kamp, Ewine F. van Dishoeck, Manuel Güdel, Pierre-Olivier Lagage, David Barrado, Alessio Caratti o Garatti, Adrian M. Glauser, Tom P. Ray, Bart Vandenbussche, L. B. F. M. Waters, Aditya M. Arabhavi, Jayatee Kanwar, Göran Olofsson, Donna Rodgers-Lee, Jürgen Schreiber, Milou Temmink   +25 more
doaj   +1 more source