Results 1 to 10 of about 584 (186)
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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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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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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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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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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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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SN 2020bio: A Double-peaked, H-poor Type IIb Supernova with Evidence of Circumstellar Interaction
The Astrophysical Journal, 2023 We present photometric and spectroscopic observations of SN 2020bio, a double-peaked Type IIb supernova (SN) discovered within a day of explosion, primarily obtained by Las Cumbres Observatory and Swift.
C. Pellegrino +14 more
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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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Problems of modelization of circumstellar matter out of equilibrium [PDF]
Symposium - International Astronomical Union, 1994 Circumstellar envelopes of young and evolved stars are responsible for many important phenomena concerning the exchange of matter, angular momentum, energy and maybe magnetic field between the core structure of stars and the interstellar medium. In particular, it is through them that matter enriched in heavy elements flows from evolved stars towards ...
J-P. J. Lafon, E. Huguet
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