2011A&A...528A..54B


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.11CET01:30:44

2011A&A...528A..54B - Astronomy and Astrophysics, volume 528A, 54-54 (2011/4-1)

Earth-based detection of the millimetric thermal emission from the nucleus of comet 8P/Tuttle.

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

Abstract (from CDS):

Little is known about the physical properties of cometary nuclei. Measuring the thermal emission of a nucleus is one of the few means of deriving its size, independently of its albedo, and constraining some of its thermal properties. This emission is difficult to detect from Earth but space telescopes, such as th Infrared Space Observatory, Spitzer Space Telescope, and Herschel Space Observatory, allow reliable measurements to be made in the infrared and the sub-millimetre domains. We attempt to characterize more accurately the thermal properties of the nucleus of comet 8P/Tuttle using multiwavelength space- and ground-based observations, in the visible, infrared, and millimetre range. We used the Plateau de Bure Interferometer to measure the millimetre thermal emission of comet p at 240GHz (1.25mm) and analysed the observations with the shape model derived from Hubble Space Telescope observations and the nucleus size derived from Spitzer Space Telescope observations. We report on the first detection of the millimetre thermal emission of a cometary nucleus since comet C/1995 O1 Hale-Bopp in 1997. Using the two contact-sphere shape model derived from Hubble Space Telescope observations, we constrain the thermal properties of the nucleus. Our millimetre observations are most accurately reproduced by assuming: i) a thermal inertia lower than ∼10J/K/m2/s1/2, and ii) an emissivity lower than 0.8, which is indicative of a non-negligible contribution of the colder sub-surface layers to the outcoming millimetre flux.

Abstract Copyright:

Journal keyword(s): comets: individual: glutag{Viz.comet 8P|8P/Tuttle} - radio continuum: planetary systems - techniques: interferometric

Simbad objects: 6

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Number of rows : 6

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 QSO B0048-09 BLL 00 50 41.31738756 -09 29 05.2102688 16.74 16.39 16.22 16.14   ~ 413 2
2 7C 0059+5808 QSO 01 02 45.76238248 +58 24 11.1366009   20.09 19.22 18.57 17.90 ~ 180 1
3 QSO B0133+476 QSO 01 36 58.59480585 +47 51 29.1000445     18.0 19.25 15.21 ~ 437 1
4 QSO B0235+1624 BLL 02 38 38.93010 +16 36 59.2746   16.46 15.50 15.92   ~ 1369 2
5 EM* MWC 349 Em* 20 32 45.6328 +40 39 36.143   15.88 13.15 12.13   Bep 692 1
6 3C 454.3 QSO 22 53 57.74798 +16 08 53.5611   16.57 16.10 15.22   ~ 2447 2

    Equat.    Gal    SGal    Ecl

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2019.12.11-01:30:44

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