Results 111 to 120 of about 386,435 (271)

The Spectral Energy Distribution of HH 30 IRS: Constraining the Circumstellar Dust Size Distribution [PDF]

, 2001
We present spectral energy distribution (SED) models for the edge-on classical T Tauri star HH 30 IRS that indicate that dust grains have grown to larger than 50 μm within its circumstellar disk.
Kenneth Wood, Kenneth Wood, M. Wolff, J. Bjorkman, B. Whitney   +4 more
semanticscholar   +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

Signatures of exosolar planets in dust debris disks

, 2000
We apply our recently elaborated, powerful numerical approach to the high-resolution modeling of the structure and emission of circumstellar dust disks, incorporating all relevant physical processes.
Gorkavyi, Nick N., Mather, John C., Ozernoy, Leonid M., Taidakova, Tanya   +3 more
core   +1 more source

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

Circumstellar dust [PDF]

The presence of dust in the general interstellar medium is inferred from the extinction, polarization, and scattering of starlight; the presence of dark nebulae; interstellar depletions; the observed infrared emission around certain stars and various ...
Dwek, E.
core   +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

Dust in circumstellar disks

, 2006
This thesis presents observational and theoretical studies of the size and spatial distribution of dust particles in circumstellar disks. Using millimetre interferometric observations of optically thick disks around T Tauri stars, I provide conclusive evidence for the presence of millimetre- to centimetre-sized dust aggregates.
openaire   +2 more sources

High Spatial Resolution Mid-IR Imaging of V838 Monocerotis: Evidence of New Circumstellar Dust Creation [PDF]

, 2008
We report high spatial resolution 11.2 and 18.1 μm imaging of V838 Monocerotis obtained with Gemini Observatory’s Michelle instrument in 2007 March. Strong emission is observed from the unresolved stellar core of V838 Mon in our Gemini imagery and is ...
J. Wisniewski, M. Clampin, K. Bjorkman, R. Barry   +3 more
semanticscholar   +1 more source

Circumstellar interaction in type Ibn supernovae and SN 2006jc

, 2009
I analyse peculiar properties of light curve and continua of enigmatic Ibn supernovae, including SN 2006jc, and argue in favour of the early strong circumstellar interaction.
Arnett, Blondin, Chevalier, Chevalier, Chevalier, Chevalier, Chevalier, Chugai, Chugai, Chugai, Chugai, Chugai, Di Carlo, Draine, Draine, Foley, Fryer, Galama, Haines, Hasegawa, Heger, Hirschi, Immler, Klein, Matheson, Mattila, Meynet, N. N. Chugai, Nakano, Nozawa, Pastorello, Pastorello, Pinto, Pozzo, Smith, Sutherland, Tabak, Tominaga, Williams, Woosley   +39 more
core   +1 more source

Evidence for Pre-Existing Dust in the Bright Type IIn SN 2010jl [PDF]

, 2011
SN 2010jl was an extremely bright, Type IIn SNe which showed a significant IR excess no later than 90 days after explosion. We have obtained Spitzer 3.6 and 4.5 \mum and JHK observations of SN 2010jl \sim90 days post explosion.
A. Landolt, Andrews, Andrews, B. E. K. Sugerman, B. Ercolano, Benetti, Cherchneff, D. L. Welch, D. Riebel, Ercolano, Fox, Fox, Gal-Yam, Geoffrey C. Clayton, J. Clem, J. E. Andrews, J. Fabbri, J. S. Gallagher, Kiewe, Kotak, Landolt, M. J. Barlow, M. Meixner, M. Otsuka, Meikle, Newton, R. Wesson, Schlegel, Schlegel, Smith, Smith, Smith, Smith, Smith, Stoll, Yamanaka   +35 more
core   +2 more sources