Results 11 to 20 of about 17,929 (222)
The Astrophysical Journal, 2023 We present a series of high-resolution echelle spectra of SN 2023ixf in M101, obtained nightly during the first week or so after discovery using PEPSI on the Large Binocular Telescope.
Nathan Smith +6 more
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Circumstellar matter around the candidate protostar EL29 [PDF]
Symposium - International Astronomical Union, 1987 Infrared speckle interferometric observations at 3.6 μm carried out at the ESO 3.6m telescope have indicated that EL29, a deeply embedded infrared source in the Ophiuchus dark cloud (Elias 1978), appears to have a core-halo structure (Zinnecker, Chelli and Perrier 1989). A fit to the data gave angular scales of order of 0.05 arcsec for the core and 3.5
H. Zinnecker, C. Perrier, A. Chelli
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Takeout and Delivery: Erasing the Dusty Signature of Late-stage Terrestrial Planet Formation
The Astrophysical Journal, 2023 The formation of planets like Earth is expected to conclude with a series of late-stage giant impacts that generate warm dusty debris, the most anticipated visible signpost of terrestrial planet formation in progress.
Joan R. Najita, Scott J. Kenyon
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The Astrophysical Journal, 2023 We have performed intensive follow-up observations of a Type IIn/Ia-CSM supernova (SN IIn/Ia-CSM), 2020uem, with photometry, spectroscopy, and polarimetry. In this paper, we report on the results of our observations focusing on optical/near-infrared (NIR)
Kohki Uno +20 more
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The Astrophysical Journal Letters, 2023 We report C, N, Mg-Al, Si, and S isotope data of six 1–3 μ m-sized SiC grains of Type X from the Murchison CM2 chondrite, believed to have formed in the ejecta of core-collapse supernova (CCSN) explosions.
Peter Hoppe +3 more
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Astrometry of circumstellar masers [PDF]
, 2002 The circumstellar masers around evolved stars offer an interesting possibility to measure stellar parameters through VLBI astrometry. In this paper the application of this technique is discussed, including the accuracy and the uncertainties of the method.
A Eckart +6 more
core +2 more sources
Circumstellar matter in Algols and Serpentids [PDF]
Space Science Reviews, 1989 A systematic search is reported for phenomena associated with circumstellar matter in interacting binary systems of the Algol and W Serpentis type. Ultraviolet emission lines have been detected by the author in 10 Algols and 6 Serpentids. No conspicuous difference exists between systems with disk accretion and those with direct stream impact.
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3D modeling of 1612 MHz OH masers: Monte Carlo modeling of the maser shells and the amplified stellar image [PDF]
, 2002 We present the first results of our 3D Monte Carlo maser radiative transfer code, used to model the 1612 MHz OH maser shell and the amplification of emission from the stellar radio-photosphere.Comment: 2 pages, 1 figure; to be published in: Proceeding of
HJ Langevelde van +3 more
core +2 more sources
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
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The Circumstellar Matter of Cygnus X-3 [PDF]
Symposium - International Astronomical Union, 1998 X-ray source in Cyg X-3 is embedded in the photo-ionized circumstellar gas. Recombination edges and emission lines were detected by ASCA observation (Kawashima, Kitamoto 1996; Liedahl, Paerels 1996). The strength of the Kα line and the recombination edge are simply determined by the atomic process.
S. Kitamoto, K. Kawashima
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