Results 101 to 110 of about 3,177 (205)
The Astronomical JournalThe carrier of the 21 μ m emission feature discovered in a handful of protoplanetary nebulae (PPNe) is one of the most intriguing enigmas in circumstellar chemistry.
Jian-Jie Qiu +9 more
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Intermediate-Mass Mergers: A New Scenario for Several FS CMa Stars
GalaxiesWe summarise the properties and nature of a peculiar group of B-type stars called FS CMa stars. These stars show the B[e] phenomenon, i.e., their spectra exhibit both forbidden emission lines and infrared excess.
Daniela Korčáková +8 more
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Limits on O VI Emission from the Shocked Circumstellar Gas of SN 1987A [PDF]
, 2008 The Far Ultraviolet Spectroscopic Explorer (FUSE) was used to search for emission from the shock interaction of the ejecta of SN 1987A with its circumstellar material. FUSE observations of SN 1987A between 2000 and 2007 did not detect broad OVI emission.
Sonneborn, George +2 more
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Laboratory studies of circumstellar and interstellar materials [PDF]
, 2009 When the most primitive types of meteorite (chondrites) and interplanetary dust particles (IDPs) formed in the solar protoplanetary disk (solar nebula), all of them incorporated at least two types of presolar material: interstellar organic matter and ...
C.M.O.D. Alexander
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The Observation of Circumstellar Disks: Dust and Gas Components
, 2004 14 pages, COMETS II, M.C. Festou, H.U. Keller, H.A. Weaver eds, to appear in 2004, Space Science Series of the University of Arizona (R. Binzel Ed.), Tucson, AZ. A high resolution version of the paper is available at: http://www.strw.leidenuniv.nl/~augereau/publications ...
Dutrey, Anne +2 more
openaire +2 more sources
Beta Pic-like circumstellar disk gas surrounding HR 10 and HD 85905 [PDF]
, 1998 We present high spectral resolution observations of the absorption lines of CaII and NaI associated with the circumstellar gas disk surrounding the two A-type shell stars HR 10 and HD 85905.
Price, R.J. +3 more
core
A circumstellar journey-physics and chemistry of AGB stellar winds [PDF]
, 2008 The physics and chemistry of the envelopes of gas and dust that surround stars on the asymptotic giant branch are the subjects of this review. Estimates of stellar mass-loss rates in this phase, as determined through observations and modelling of ...
Olofsson, Hans,, Olofsson, Hans
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Probing the Era of Giant Collisions: Millimeter Observations of the HD 166191 System
The Astrophysical JournalWe present nonsimultaneous Atacama Large Millimeter/submillimeter Array (ALMA) Band 7 and Submillimeter Array (SMA) observations of the HD 166191 disk, which was recently thought to have a collision in its terrestrial planet zone.
Kadin Worthen +7 more
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The dusty envelopes of asymptotic giant branch stars with ultraviolet excesses
Astronomy & AstrophysicsContext. Roughly spherical envelopes around asymptotic giant branch (AGB) stars transform into the highly asymmetric morphologies observed in planetary nebulae.
Alonso-Hernández J. +3 more
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Effects of Metallicity on Graphite, TiC, and SiC Condensation in Carbon Stars
The Astrophysical JournalFrom transmission electron microscopy and other laboratory studies of presolar grains, the implicit condensation sequence of carbon-bearing condensates in circumstellar envelopes of carbon stars is (from first to last) TiC-graphite-SiC.
Gabrielle M. Adams, Katharina Lodders
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