Results 81 to 90 of about 13,144 (210)

Dust-evacuated Zones near Massive Stars: Consequences of Dust Dynamics on Star-forming Regions

The Astrophysical Journal
Stars form within dense cores composed of both gas and dust within molecular clouds. However, despite the crucial role that dust plays in the star formation process, its dynamics is frequently overlooked, with the common assumption being a constant ...
Nadine H. Soliman, Philip F. Hopkins, Michael Y. Grudić   +2 more
doaj   +1 more source

The destruction of dust grains in collisions of a supernova with a circumstellar medium [PDF]

Monthly Notices of the Royal Astronomical Society, 1985
Dust grains exist, if not abundantly, in systems composed of a Type II supernova and a circumstellar medium (CSM). The grains, however, may subsequently suffer intense sputtering by X-ray emitting plasmas during the collision of the supernova ejecta with the CSM.
openaire   +1 more source

A near-infrared interferometric survey of debris disc stars. II. CHARA/FLUOR observations of six early-type dwarfs [PDF]

, 2008
High-precision interferometric observations of six early-type main sequence stars known to harbour cold debris discs have been obtained in the near-infrared K band with the FLUOR instrument at the CHARA Array.
A. Mérand, A.-M. Lagrange, Absil, Abt, Abt, Abt, Allende Prieto, Aufdenberg, Augereau, Aumann, Babel, Baraffe, Bertin, Bessel, Blackwell, Boden, Bordé, Bryden, Chambers, Chambers, Chen, Chen, Ciardi, Claret, Coudé du Foresto, Coudé du Foresto, D. Defrère, D. Ehrenreich, Di Benedetto, Di Folco, Di Folco, Domiciano de Souza, Du Foresto, E. Di Folco, G. Montagnier, Gomes, Gray, Guyon, H. A. McAlister, Hanbury Brown, Hauschildt, Honda, J. Olofsson, J. P. Aufdenberg, J. Sturmann, J.-C. Augereau, Kalas, Kenyon, Kenyon, Kenyon, Kervella, Kervella, Kokubo, L. Sturmann, Landstreet, Lanz, Leggett, M. Desort, Malagnini, Mann, McAlister, Monnier, Morel, N. H. Turner, O. Absil, P. Kervella, Pantin, Perryman, Peterson, Peterson, Reche, Rieke, Royer, Sanders, Schmitt, Schröder, Selby, Sneden, Su, Su, Sylvester, T. A. ten Brummelaar, ten Brummelaar, Tomkin, V. Coudé du Foresto, van Belle, van Leeuwen, Wyatt, Wyatt   +88 more
core   +4 more sources

Isomerism of CH2SO: Accurate structural, energetic, and spectroscopic characterization

Journal of Computational Chemistry, Volume 45, Issue 11, Page 777-786, April 30, 2024.
What is the next sulfur‐containing molecule that will be detected in space? Guided by the experimental data on the cis‐/trans‐HC(O)SH conformers, the structural and spectroscopic properties of cis‐/trans‐HC(S)OH have been accurately determined using state‐of‐the‐art quantum‐chemical approaches. Abstract A recent work [Ye et al. Mon. Not. R. Astron. Soc.
Cristina Puzzarini, Hexu Ye, Silvia Alessandrini   +2 more
wiley   +1 more source

Formation of Interstellar C₆₀ from Silicon Carbide Circumstellar Grains [PDF]

The Astrophysical Journal Letters, 2019
Abstract We have conducted laboratory experiments with analog crystalline silicon carbide (SiC) grains using transmission electron microscopy (TEM) and electron energy-loss spectroscopy (EELS). The 3C polytype of SiC was used—the type commonly produced in the envelopes of asymptotic giant branch (AGB) stars.
J. J. Bernal, P. Haenecour, J. Howe, T. J. Zega, S. Amari, L. M. Ziurys   +5 more
openaire   +1 more source

Chiroptical properties of membrane glycerophospholipids and their chiral backbones

Chirality, Volume 36, Issue 3, March 2024.
Examination of the interaction of glycerophospholipids with circularly polarized light suggests that direct induction of symmetry breaking to membrane lipids by chiral photons is unlikely. However, anisotropy spectra of certain analogs indicate potential alternative mechanisms for the origins of membrane lipid homochirality, providing insights into the
Jana Bocková, Adrien D. Garcia, Nykola C. Jones, Søren V. Hoffmann, Cornelia Meinert   +4 more
wiley   +1 more source

Mid-IR observations of circumstellar disks -- Part III: A mixed sample of PMS stars and Vega-type objects

, 2009
We present new mid-infrared spectra for a sample of 15 targets (1 FU Orionis object, 4 Herbig Ae stars, 5 T Tauri stars and 5 Vega type stars), obtained with the TIMMI2 camera at La Silla Observatory (ESO).
Acke, Acke, Beichman, Boersma, Bohac, Bouwman, Bouwman, Byrne, Carmona, Catala, Cohen, Coulson, D'Angelo, Dent, Dorschner, Doucet, Dullemond, Dunkin, E. Peeters, Furlan, G. Meeus, Geers, Geers, Geers, Green, Habart, Habart, Hales, Hallenbeck, Hanner, Hartmann, Henning, Herbig, Hernández, Higdon, Hillenbrand, Honda, Hony, Houck, Hudgins, Hutchinson, Jaeger, Jayawardhana, Jensen, Kemper, Kenyon, Kenyon, Kessler-Silacci, Kessler-Silacci, Kurucz, Käufl, Lagage, Lagage, Leinert, Leinert, Li, Lisse, Lisse, Lovis, Lowrance, M. F. Sterzik, Malfait, Mamajek, Mannings, Mattioda, Meeus, Meeus, Meeus, Moorwood, Natta, O. Schütz, Okamoto, Oudmaijer, Pascucci, Pasquini, Peeters, Peeters, Perrin, Pogodin, Prato, Przygodda, Quanz, Quanz, Quast, Savage, Schegerer, Schütz, Schütz, Servoin, Sheret, Sicilia-Aguilar, Sloan, Sloan, Sloan, Smith, Song, Song, Spitzer, Stencel, Sterzik, Strassmeier, Sylvester, Sylvester, Sylvester, Tielens, Torres, Torres, Torres, van Boekel, van Boekel, van Boekel, van den Ancker, van Diedenhoven, Van Kerckhoven, Vieira, Wang, Werner, Wyatt, Yudin, Zuckerman, Zuckerman   +120 more
core   +1 more source

Disentangling the Origin and Heating Mechanism of Supernova Dust: Late-Time Spitzer Spectroscopy of the Type IIn SN 2005ip [PDF]

, 2010
This paper presents late-time near-infrared and {\it Spitzer} mid-infrared photometric and spectroscopic observations of warm dust in the Type IIn SN 2005ip in NGC 2906.
Chevalier, Roger A., Dwek, Eli, Fox, Ori D., Leisenring, Jarron M., Skrutskie, Michael F., Sugerman, Ben E. K.   +5 more
core   +3 more sources

L1448 IRS3B: Dust Polarization Aligned with Spiral Features, Tracing Gas Flows

The Astrophysical Journal
Circumstellar disk dust polarization in the (sub)millimeter is, for the most part, not from dust grain alignment with magnetic fields but rather indicative of a combination of dust self-scattering with a yet unknown alignment mechanism that is consistent
Leslie W. Looney, Zhe-Yu Daniel Lin, Zhi-Yun Li, John J. Tobin, Martin Radecki, Syzygy Butte, Ian W. Stephens, Manuel Fernández-López, Haifeng Yang, Nickalas K. Reynolds, Patrick Sheehan, Woojin Kwon, Rachel Harrison, Allen North   +13 more
doaj   +1 more source

Nanosilicates and molecular silicate dust species: properties and observational prospects

Frontiers in Astronomy and Space Sciences
Silicate dust is found in a wide range of astrophysical environments. Nucleation and growth of silicate dust grains in circumstellar environments likely involves species with diameters ranging from <1 nm (molecular silicates) to a few nanometers ...
Stefan T. Bromley, Stefan T. Bromley
doaj   +1 more source