ub.xmlui.mirage2.page-structure.muninLogoub.xmlui.mirage2.page-structure.openResearchArchiveLogo
    • EnglishEnglish
    • norsknorsk
  • Velg spraaknorsk 
    • EnglishEnglish
    • norsknorsk
  • Administrasjon/UB
Vis innførsel 
  •   Hjem
  • Fakultet for naturvitenskap og teknologi
  • Institutt for fysikk og teknologi
  • Artikler, rapporter og annet (fysikk og teknologi)
  • Vis innførsel
  •   Hjem
  • Fakultet for naturvitenskap og teknologi
  • Institutt for fysikk og teknologi
  • Artikler, rapporter og annet (fysikk og teknologi)
  • Vis innførsel
JavaScript is disabled for your browser. Some features of this site may not work without it.

The Discus Comet: C/2014 B1 (Schwartz)

Permanent lenke
https://hdl.handle.net/10037/17652
DOI
https://doi.org/10.3847/1538-3881/aafe05
Thumbnail
Åpne
article.pdf (1.412Mb)
Publisert versjon (PDF)
Dato
2019-02-08
Type
Journal article
Tidsskriftartikkel
Peer reviewed

Forfatter
Jewitt, David; Kim, Yoonyoung; Luu, Jane; Graykowski, Ariel
Sammendrag
Long-period comet C/2014 B1 (Schwartz) exhibits a remarkable optical appearance, like that of a discus or bi-convex lens viewed edgewise. Our measurements in the four years since discovery reveal a unique elongated dust coma whose orientation is stable with respect to the projected antisolar and orbital directions. With no tail and no trail, the limited influence of radiation pressure on the dust coma sets a lower limit to the effective particle size 100 μm, while the photometry reveals a peak coma scattering cross-section 2.7 × 104 km2 (geometric albedo 0.1 assumed). From the rate of brightening of the comet we infer a dust production rate 10 kg s−1 at 10 au heliocentric distance, presumably due to the sublimation of supervolatile ices, and perhaps triggered by the crystallization of amorphous water ice. We consider several models for the origin of the peculiar morphology. The disk-like shape is best explained by equatorial ejection of particles from a nucleus whose spin vector lies near the plane of the sky. In this interpretation, the unique appearance of C/2014 B1 is a result of a near equality between the rotation-assisted nucleus escape speed (~1–10 m s−1 for a 2–20 km scale nucleus) and the particle ejection velocity, combined with a near-equatorial viewing perspective. To date, most other comets have been studied at heliocentric distances less than half that of C/2014 B1, where their nucleus temperatures, gas fluxes, and dust ejection speeds are much higher. The throttling role of nucleus gravity is correspondingly diminished, so that the disk morphology has not before been observed.
Beskrivelse
DOI fungerer ikke.
Publisher's version available at: https://iopscience.iop.org/article/10.3847/1538-3881/aafe05
Forlag
The American Astronomical Society (AAS)
Sitering
Jewitt, D., Kim, Y., Luu, J,, Graykowski,.A. (2019) The Discus Comet: C/2014 B1 (Schwartz). Astronomical Journal, 57,(3), 1-11.
Metadata
Vis full innførsel
Samlinger
  • Artikler, rapporter og annet (fysikk og teknologi) [1057]
Copyright 2019 The Author(s)

Bla

Bla i hele MuninEnheter og samlingerForfatterlisteTittelDatoBla i denne samlingenForfatterlisteTittelDato
Logg inn

Statistikk

Antall visninger
UiT

Munin bygger på DSpace

UiT Norges Arktiske Universitet
Universitetsbiblioteket
uit.no/ub - munin@ub.uit.no

Tilgjengelighetserklæring