G359.87+0.18: A Young Supernova Remnant Candidate near the Galactic Center? | Zendy

F. YusefZadeh | Zendy; W. D. Cotton | Zendy; Stephen P. Reynolds | Zendy

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G359.87+0.18: A Young Supernova Remnant Candidate near the Galactic Center?

Author(s) -

F. YusefZadeh,

W. D. Cotton,

Stephen P. Reynolds

Publication year - 1998

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/311294

Subject(s) - supernova remnant , physics , astrophysics , galaxy , supernova , galactic center , near earth supernova , spectral index , astronomy , center (category theory) , spectral line , chemistry , crystallography

Sub-arcsecond radio continuum observations of the Galactic center region at$\lambda$6 and 2cm reveal a 0.5$^{\prime\prime}$ diameter source with ashell-like morphology. This source is linearly polarized at a level of 16% at$\lambda$6cm and has a steep nonthermal spectrum with spectral index 1.6between $\lambda$6 and 2 cm. The distance to this source is not known but thelarge rotation measure value of 3000 rad m$^{-2}$ suggests that G359.87+0.18 islikely to be located in the inner Galaxy or at an extragalactic distance. Wediscuss possible interpretations of this object as a recent supernova, a veryyoung supernova remnant, a nova remnant, or an extragalactic source. Allpossibilities are highly problematic.Comment: 11 pages, 3 figures, ApJ Lett in pres

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