2013A&A...557A..88B


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.15CEST12:09:09

2013A&A...557A..88B - Astronomy and Astrophysics, volume 557A, 88-88 (2013/9-1)

Millimetre continuum observations of comet C/2009 P1 (Garradd).

BOISSIER J., BOCKELEE-MORVAN D., GROUSSIN O., LAMY P., BIVER N., CROVISIER J., COLOM P., MORENO R., JORDA L. and PIETU V.

Abstract (from CDS):

Little is known about the physical properties of the nuclei of Oort Cloud comets. Measuring the thermal emission of a nucleus is one of the few means for deriving its size and constraining some of its thermal properties. We attempted to measure the nucleus size of the Oort Cloud comet C/2009 P1 (Garradd). We used the Plateau de Bure Interferometer to measure the millimetric thermal emission of this comet at 157 GHz (1.9 mm) and 266 GHz (1.1 mm). Whereas the observations at 266 GHz were not usable due to bad atmospheric conditions, we derived a 3σ upper limit on the comet continuum emission of 0.41 mJy at 157 GHz. Using a thermal model for a spherical nucleus with standard thermal parameters, we found an upper limit of 5.6 km for the radius. The dust contribution to our signal is estimated to be negligible. Given the water production rates measured for this comet and our upper limit, we estimated that Garradd was very active, with an active fraction of its nucleus larger than 50%.

Abstract Copyright:

Journal keyword(s): comets: individual: glutag{Viz.comet "C/2009 P1"|C/2009 P1 (Garradd)} - radio continuum: planetary systems - techniques: interferometric

Simbad objects: 3

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Number of rows : 3

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 8C 1435+638 QSO 14 36 45.8021364767 +63 36 37.865982148   17.06 16.86 16.23   ~ 180 1
2 6C 164218+690201 QSO 16 42 07.84850549 +68 56 39.7564973   19.723   19.219   ~ 278 1
3 EM* MWC 349 Em* 20 32 45.6328 +40 39 36.143   15.88 13.15 12.13   Bep 688 1

    Equat.    Gal    SGal    Ecl

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2019.10.15-12:09:09

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