Results 71 to 80 of about 362,838 (268)
L1448 IRS3B: Dust Polarization Aligned with Spiral Features, Tracing Gas Flows
The Astrophysical JournalCircumstellar 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 +13 more
doaj +1 more source
MODELS OF CIRCUMSTELLAR MASERS IN BIPOLAR OUTFLOWS
Odessa Astronomical Publications, 2017 Sources of molecular maser radio emission in envelopes of late-type variable stars (red giants and supergiants) are considered. Radio and optical data on asymmetry of mass loss process in red giants are briefly reviewed.
G. M. Rudnitskij
doaj +1 more source
VLT spectropolarimetry of the optical transient in NGC 300 - Evidence of asymmetry in the circumstellar dust [PDF]
, 2009 Aims. We study possible signs of asymmetry in the bright optical transient in NGC 300, to obtain independent information about the explosion mechanism, the progenitor star and its circumstellar environment. Methods.
F. Patat +6 more
semanticscholar +1 more source
Morphological Properties of PPNs: Mid-IR and HST Imaging Surveys
, 2000 We will review our mid-infrared and HST imaging surveys of the circumstellar dust shells of proto-planetary nebulae. While optical imaging indirectly probes the dust distribution via dust-scattered starlight, mid-IR imaging directly maps the distribution
B Zuckerman +6 more
core +2 more sources
The Astrophysical JournalYoung protostellar binary systems, with expected ages less than ∼10 ^5 yr, are little modified since birth, providing key clues to binary formation and evolution. We present a first look at the young, Class 0 binary protostellar system R CrA IRAS 32 from
Frankie J. Encalada +21 more
doaj +1 more source
Dust Around T Tauri Stars [PDF]
Journal of Astronomy and Space Sciences, 2011 To reproduce the multiple broad peaks and the fine spectral features in the spectral energy distributions (SEDs) of T Tauri stars, we model dust around T Tauri stars using a radiative transfer model for multiple isothermal circumstellar dust shells. We
Kyung-Won Suh, Young-Joo Kwon
doaj +1 more source
Low RV from Circumstellar Dust around Supernovae [PDF]
, 2008 The effective extinction law for supernovae surrounded by circumstellar dust is examined with Monte Carlo simulations. Grains with light scattering properties as for interstellar dust in the Milky Way (MW) or the Large Magellanic Clouds (LMC), but ...
A. Goobar
semanticscholar +1 more source
Mid-infrared spectroscopy of CAI and AOA from the Allende CV3.2 chondrite [PDF]
, 2005 Mid-infrared spectra of bulk CAI from the CV3.2 chondrite Allende are presented and compared with astronomical spectra of cometary dust, zodiacal light,the circumstellar disk of beta Pictoris and dust around the red supergiant PR ...
Bland, P. A. +5 more
core
Natural Sciences, Volume 4, Issue 4, October 2024.Large free aromatic species, with up to 61 carbon atoms, were detected in grains of the Ryugu carbonaceous asteroid using ultra‐sensitive two‐step laser mass spectrometry. This discovery confirms the presence of large polycyclic aromatic hydrocarbons in the interstellar medium and provides new information on the formation and evolution of organic ...
Hassan Sabbah +3 more
wiley +1 more source
Post-AGB stars with hot circumstellar dust: binarity of the low-amplitude pulsators [PDF]
, 2009 Context. The influence of binarity on the late stages of stellar evolut ion. Aims. While the first binary post-AGB stars were serendipitously d iscovered, the distinct characteristics of their Spectral Energy Distribution (SED) allowed us to launch a ...
H. Winckel +30 more
semanticscholar +1 more source