Results 41 to 50 of about 77,803 (191)
The Evolution of Circumstellar Disks in Ophiuchus Binaries
The Astrophysical Journal, 2008 Four Ophiuchus binaries, two Class I systems and two Class II systems, with separations of ~450-1100 AU, were observed with the Owens Valley Radio Observatory (OVRO) millimeter interferometer. In each system, the 3 mm continuum maps show dust emission at the location of the primary star, but no emission at the position of the secondary.
Patience, J. +2 more
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Vertical Structure of Gas and Dust in Four Debris Disks
The Astrophysical JournalWe present high-spectral-resolution M -band spectra from iSHELL on NASA’s Infrared Telescope Facility along the line of sight to the debris disk host star HD 32297. We also present a Gemini Planet Imager H -band polarimetric image of the HD 131488 debris
Kadin Worthen +10 more
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Observations of circumstellar disks in scattered light with SPHERE at the VLT
Comptes Rendus. Physique, 2023 The technological developments initiated in the early 21$^{\rm st}$ century have led to the implementation of “planet finders” instruments on 8-m class telescopes which are in operation since 2014-2015. Such facilities are at the inception of significant
Boccaletti, Anthony
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The Warped Circumstellar Disk of HD 100546
The Astrophysical Journal, 2006 We propose that the two armed spiral features seen in visible Hubble Space Telescope images of scattered light in HD100546's circumstellar disk are caused by the illumination of a warped outer disk. A tilt of 6-15 degrees from the symmetry plane can cause the observed surface brightness variations providing the disk is very twisted (highly warped) at ...
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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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, 1999 33 pages, 12 figures, to be published in The Physics of Star Formation and Early Evolution II, C.J. Lada and N.D.
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Methanol Masers—Are They in Circumstellar Disks? [PDF]
International Astronomical Union Colloquium, 1998 AbstractSince the discovery of the 12.2 and 6.7 GHz methanol maser lines, these masers have been studied in great detail. Even in the earliest studies, it appeared that in some fraction of the sources, the maser spots were arranged in lines. This contrasts with the well-studied OH and water masers, in which the masers tended to be clustered almost ...
R. P. Norris +2 more
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Secret of Longevity: Protoplanetary Disks as a Source of Gas in Debris Disks
The Astrophysical JournalWhile protoplanetary disks (PPDs) are generally thought to disperse within several million years, recent observations have revealed gas in their older counterparts, debris disks.
Wataru Ooyama +4 more
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Millimetre/Sub-millimetre Observations of Circumstellar Disks [PDF]
, 2011 International audienceTTauri disks located in nearby star-forming regions (e.g. Taurus-Auriga at 140 pc) are thought to be the site of planet formation, since proto-planetary disks orbiting around active (still accreting) TTauri stars should contain, in ...
Dutrey, Anne
core +1 more source
Imaging of the Vega Debris System Using JWST/MIRI
The Astrophysical JournalWe present images of the Vega planetary debris disk obtained at 15.5, 23, and 25.5 μ m with the Mid-Infrared Instrument on JWST. The debris system is remarkably symmetric, smooth, and centered accurately on the star.
Kate Y. L. Su +8 more
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