Results 71 to 80 of about 280,504 (183)

Micro‐ and nanoscale studies of insoluble organic matter and C‐rich presolar grains in Murchison and Sutter's Mill in preparation for Bennu sample analysis

Meteoritics &Planetary Science, Volume 59, Issue 10, Page 2831-2850, October 2024.
Abstract Samples of B‐type asteroid (101955) Bennu returned by the Origins, Spectral Interpretation, Resource Identification, and Security–Regolith Explorer (OSIRIS‐REx) spacecraft will provide unique insight into the nature of carbonaceous asteroidal matter without the atmospheric entry heating or terrestrial weathering effects associated with ...
A. N. Nguyen, S. J. Clemett, K. Thomas‐Keprta, C. M. O'D. Alexander, D. P. Glavin, J. P. Dworkin, H. C. Connolly Jr, D. S. Lauretta   +7 more
wiley   +1 more source

Fragmentation in interstellar filaments [PDF]

, 2019
Interstellare Filamente sind ein wesentlicher Schritt der Sternentstehung. In den letzten Jahren haben Beobachtungen die analytischen und numerischen Studien aus mehreren Jahrzehnten bewiesen, die gezeigt haben, dass Molekülwolken im interstellaren ...
Heigl, Stefan
core  

Large-scale Velocity-coherent Filaments in the SEDIGISM Survey: Association with Spiral Arms and Fraction of Dense Gas

, 2023
Context. Filamentary structures in the interstellar medium are closely related to star formation. Dense gas mass fraction (DGMF) or clump formation efficiency in large-scale filaments possibly determine their hosting star formation activities. Aims.
A. R. Pettitt, Rigby, A. J., Pettitt, A. R., P. Barnes, Barnes, P., Rigby, A.J., E. Durán-Camacho, A. Sánchez-Monge, Sánchez-Monge, Á., Colombo, D., Duran-Camacho, E, D. Colombo, Bronfman, L., Neupane, S., D. Eden, A. Y. Yang, A. Duarte-Cabral, Beuther, H., K. R. Neralwar, Neralwar, K. R., Eden, D., Yang, A. Y., Urquhart, J. S., Durán-Camacho, E., L. Bronfman, J. S. Urquhart, S. Neupane, Pettitt, A R, A. J. Rigby, Henning, T., Ge, Y., Urquhart, J.S., H. Beuther, Wang, K., Ge, Y, Duarte-Cabral, A., Neralwar, K.R., Y. Ge, Dobbs, C. L., T. Henning, K. Wang, C. L. Dobbs   +41 more
core   +1 more source

Limitations of the modified blackbody fit method for determining molecular cloud properties

Astronomische Nachrichten, Volume 345, Issue 4, May 2024.
Abstract Achieving a comprehensive understanding of the star and planet formation process is one of the fundamental tasks of astrophysics, requiring detailed knowledge of the physical conditions during the different phases of this process. During the earliest stages, that is, concerning physical processes in molecular clouds and filaments, the column ...
Niko Zielinski, Sebastian Wolf
wiley   +1 more source

Fordern galaktische Zwerge die Kosmologie heraus?

Physik in unserer Zeit, Volume 55, Issue 3, Page 128-135, May 2024.
Dem Standardmodell der Kosmologie zufolge sollten sich Satellitengalaxien nahezu zufällig um ihre Hauptgalaxie verteilen und bewegen. Beobachtete Systeme um die Milchstraße und andere nahe Galaxien sind deutlich geordneter. Ist dies ein Problem für das Modell oder sogar für unser Verständnis der Dunklen Materie?
Marcel S. Pawlowski
wiley   +1 more source

Mass assembly in star formation via interstellar filaments

, 2021
Understanding how diffuse molecular clouds at large scales (~10 pc) assemble mass into dense, star-forming cores at small scales (~ 0.1 pc) is crucial to building a holistic theory of star formation.
Chen, Michael Chun-Yuan
core  

Brecciation at the grain scale within the lithologies of the Winchcombe Mighei‐like carbonaceous chondrite

Meteoritics &Planetary Science, Volume 59, Issue 5, Page 1068-1100, May 2024.
Abstract The Mighei‐like carbonaceous (CM) chondrites have been altered to various extents by water–rock reactions on their parent asteroid(s). This aqueous processing has destroyed much of the primary mineralogy of these meteorites, and the degree of alteration is highly heterogeneous at both the macroscale and nanoscale.
Luke Daly, Martin D. Suttle, Martin R. Lee, John Bridges, Leon Hicks, Pierre‐Etienne M. C. Martin, Cameron J. Floyd, Laura E. Jenkins, Tobias Salge, Ashley J. King, Natasha V. Almeida, Diane Johnson, Patrick W. Trimby, Haithem Mansour, Fabian B. Wadsworth, Gavyn Rollinson, Matthew J. Genge, James Darling, Paul A. J. Bagot, Lee F. White, Natasha R. Stephen, Jennifer T. Mitchell, Sammy Griffin, Francesca M. Willcocks, Rhian Jones, Sandra Piazolo, Joshua F. Einsle, Alice Macente, Lydia J. Hallis, Aine O'Brien, Paul F. Schofield, Sara S. Russell, Helena Bates, Caroline Smith, Ian Franchi, Lucy V. Forman, Phil A. Bland, David Westmoreland, Iain Anderson, Richard Taylor, Mark Montgomery, Mark Parsons, Jérémie Vasseur, Matthias van Ginneken, Penelope J. Wozniakiewicz, Mark J. Burchell, Daniel Hallatt, Luke S. Alesbrook, Vassilia Spathis, Richard Worden, Julie Behnsen, Kate Black, the UK Fireball Alliance   +52 more
wiley   +1 more source

Investigating the impact of x‐ray computed tomography imaging on soluble organic matter in the Murchison meteorite: Implications for Bennu sample analyses

Meteoritics &Planetary Science, Volume 59, Issue 1, Page 105-133, January 2024.
Abstract X‐ray computed tomography (XCT) is a valuable reconnaissance tool for three‐dimensional imaging and identification of distinct lithologies in extraterrestrial samples. It will be used as part of the preliminary examination of samples returned from asteroid (101955) Bennu by the Origins, Spectral Interpretation, Resource Identification, and ...
Daniel P. Glavin, Scott A. Eckley, José C. Aponte, Eve L. Berger, Aaron S. Burton, Jason P. Dworkin, Jamie E. Elsila, Frank T. Ferguson, Yoshihiro Furukawa, Heather V. Graham, Toshiki Koga, Michael Liss, Hannah L. McLain, Hiroshi Naraoka, Yasuhiro Oba, Eric T. Parker, Kevin Righter, Philippe Schmitt‐Kopplin, Danielle N. Simkus, Yoshinori Takano, Harold C. Connolly Jr., Dante S. Lauretta   +21 more
wiley   +1 more source

Planck intermediate results: XXXIII. Signature of the magnetic field geometry of interstellar filaments in dust polarization maps

, 2020
© ESO, 2016.Planck observations at 353 GHz provide the first fully sampled maps of the polarized dust emission towards interstellar filaments and their backgrounds (i.e., the emission observed in the surroundings of the filaments).
Bond J., Bouchet F., Diego J., Boulanger F., Douspis M., Elsner F., Borrill J., Fraisse A., Danese L., Crill B., Forni O., Dickinson C., Arzoumanian D., Christensen P., Davis R., Franceschi E., Ade P., Bersanelli M., Burigana C., Bernard J., Calabrese E., Davies R., De Rosa A., Finelli F., Falgarone E., Bonavera L., Dupac X., Doré O., Eriksen H., Cardoso J., Catalano A., Chamballu A., Clements D., Combet C., Frailis M., Baccigalupi C., Galli S., Bracco A., Delabrouille J., Frejsel A., Couchot F., Cuttaia F., Arnaud M., Berné O., Banday A., Colombo L., Battaner E., De Bernardis P., De Zotti G., Ferrière K., Ducout A., Alves M., Chiang H., Bonaldi A., Bartolo N., Donzelli S., Benoit-Lévy A., Aumont J., Curto A., Bielewicz P., Barreiro R., Enßlin T., Colombi S., Galeotta S., Benabed K., Aghanim N.   +65 more
core   +1 more source

Structures of Magnetically-Supported Filaments and their Appearance in the Linear Polarization

, 2017
Dust thermal emissions observed with Herschel have revealed that interstellar molecular clouds consist of many filaments. Polarization observation of interstellar extinctions in the optical and near IR wavelengths shows that the dense filaments are ...
Tomisaka, Kohji (5389906), Tomisaka, Kohji   +1 more
core   +1 more source