2011A&A...531L...2P


Query : 2011A&A...531L...2P

2011A&A...531L...2P - Astronomy and Astrophysics, volume 531, L2-2 (2011/7-1)

High-sensitivity search for clumps in the Vega Kuiper-belt. New PdBI 1.3mm observations.

PIETU V., DI FOLCO E., GUILLOTEAU S., GUETH F. and COX P.

Abstract (from CDS):

Previous studies have found that Vega is surrounded by an extended debris disc that is very smooth in the far infrared, but displays possible clumpiness at 850µm and dust emission peaks at 1.3mm. We reobserved Vega at 1.3mm with PdBI to constrain its circumstellar dust distribution. Our observations of a three-field mosaic have a factor of two higher sensitivity than previous observations. We detect Vega photosphere with the expected flux, but none of the previously reported emission peaks that should have been detected at the >6σ level, with a sensitivity <1mK. This implies that the dust distribution around Vega is principally smooth and circularly symmetric. This also means that no planet is needed to account for dust trapped in mean-motion resonnance.

Abstract Copyright:

Journal keyword(s): radio continuum: stars - stars: individual: Vega - circumstellar matter - methods: observational - instrumentation: interferometers

VizieR on-line data: <Available at CDS (J/A+A/531/L2): list.dat fig1.fits fig2.fits>

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 * alf Lyr dS* 18 36 56.33635 +38 47 01.2802 0.03 0.03 0.03 0.07 0.10 A0Va 2549 0
2 EM* MWC 349 ** 20 32 45.499080 +40 39 36.74124   15.88 13.15 12.13   Bep 732 0

    Equat.    Gal    SGal    Ecl

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2021.07.28-09:25:21

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