0000000001258254

AUTHOR

N. Panagia

showing 4 related works from this author

Light Curves of Radio Supernovae

2007

We present the results from the on-going radio monitoring of recent type II supernovae (SNe), including SNe 2004et, 2004dj, 2002hh, 2001em, and 2001gd. Using the Very Large Array to monitor these supernovae, we present their radio light-curves. From these data we are able to discuss parameterizations and modeling and make predictions of the nature of the progenitors based on previous research. Derived mass loss rates assume wind-established circumstellar medium, shock velocity ~10,000 km/s, wind velocity ~10 km/s, and CSM Temperature ~10,000 K.

Very large arrayPhysicsAstrophysics::High Energy Astrophysical PhenomenaAstrophysics (astro-ph)AstronomyFOS: Physical sciencesAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysicsAstrophysicsLight curveWind speedShock (mechanics)SupernovaAstrophysics::Solar and Stellar AstrophysicsAstrophysics::Galaxy AstrophysicsAIP Conference Proceedings
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Recent Type II Radio Supernovae

2007

We present the results of radio observations, taken primarily with the Very Large Array, of Supernovae 1993J, 2001gd, 2001em, 2002hh, 2004dj, and 2004et. We have fit a parameterized model to the multi-frequency observations of each supernova. We compare the observed and derived radio properties of these supernovae by optical classification and discuss the implications.

PhysicsVery large arraySupernovaAstrophysics::High Energy Astrophysical PhenomenaAstrophysics (astro-ph)Parameterized complexityFOS: Physical sciencesAstronomyAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysicsAstrophysicsAstrophysics::Galaxy AstrophysicsAIP Conference Proceedings
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High-resolution radio imaging of young supernovae

2004

The high resolution obtained through the use of VLBI gives an unique opportunity to directly observe the interaction of an expanding radio supernova with its surrounding medium. We present here results from our VLBI observations of the young supernovae SN 1979C, SN 1986J, and SN 2001gd.

Astrophysics (astro-ph)FOS: Physical sciencesAstrophysics
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23 GHz VLBI observations of SN 2008ax (Research Note)

2009

We report on phase-referenced 23 GHz Very-Long-Baseline-Interferometry (VLBI) observations of the type IIb supernova SN 2008ax, made with the Very Long Baseline Array (VLBA) on 2 April 2008 (33 days after explosion). These observations resulted in a marginal detection of the supernova. The total flux density recovered from our VLBI image is 0.8 ± 0.3 mJy (one standard deviation). As it appears, the structure may be interpreted as either a core-jet or a double source. However, the supernova structure could be somewhat confused with a possible close by noise peak. In such a case, the recovered flux density would decrease to 0.48 ± 0.12 mJy, compatible with the flux densities measured with the…

individual : SN 2008ax [Supernovae]general [Supernovae]Galaxies : individual : NGC 4490; Radio continuum : stars; Supernovae : individual : SN 2008ax; Supernovae: generalstars [Radio continuum]UNESCO::ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia::Estrellasindividual : NGC 4490 [Galaxies]:ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia::Galaxias [UNESCO]UNESCO::ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia::Galaxias:ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia::Estrellas [UNESCO]
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