Extreme Conditions in a Close Analog to the Young Solar System: Herschel Observations of ∈ Eridani
Journal article, 2014
Far-infrared Herschel images of the is an element of Eridani system, seen at a fifth of the Sun's present age, resolve two belts of debris emission. Fits to the 160 mu m PACS image yield radial spans for these belts of 12-16 and 54-68 AU. The south end of the outer belt is approximate to 10% brighter than the north end in the PACS+SPIRE images at 160, 250, and 350 mu m, indicating a pericenter glow attributable to a planet "c" From this asymmetry and an upper bound on the offset of the belt center, this second planet should be mildly eccentric (e(c) approximate to 0.03-0.3). Compared to the asteroid and Kuiper Belts of the young Sun, the is an element of Eri belts are intermediate in brightness and more similar to each other, with up to 20 km sized collisional fragments in the inner belt totaling approximate to 5% of an Earth mass. This reservoir may feed the hot dust close to the star and could send many impactors through the Habitable Zone, especially if it is being perturbed by the suspected planet is an element of Eri b, at semi-major axis approximate to 3 AU.
circumstellar matter
SPITZER
STAR EPSILON-ERIDANI
VEGA
SIZE DISTRIBUTIONS
stars: individual (is an element of Eridani)
DEBRIS DISK
planet-disk interactions
MASS
BELT
MIGRATION
PLANETS
EVOLUTION
Author
J. S. Greaves
University of St Andrews
B. Sibthorpe
Royal Observatory
B. Acke
KU Leuven
E. Pantin
Centre national de la recherche scientifique (CNRS)
B. Vandenbussche
KU Leuven
G. Olofsson
Stockholm University
C. Dominik
Anton Pannekoek Institute for Astronomy
Radboud University
M. J. Barlow
University College London (UCL)
G. J. Bendo
University of Manchester
Jadl Blommaert
KU Leuven
Astronomy and Astrophysics Research Group
A. Brandeker
Stockholm University
B. L. de Vries
Stockholm University
W. R. F. Dent
Atacama Large Millimeter-submillimeter Array (ALMA)
J. Di Francesco
National Research Council Canada
M. Fridlund
German Aerospace Center (DLR)
European Space Agency (ESA)
W. K. Gear
Cardiff University
P. M. Harvey
The University of Texas at Austin
M. R. Hogerheijde
Leiden University
W. S. Holland
University of Edinburgh
Royal Observatory
R. J. Ivison
European Southern Observatory (ESO)
University of Edinburgh
René Liseau
Chalmers, Earth and Space Sciences, Radio Astronomy and Astrophysics
B. C. Matthews
University of Victoria
National Research Council Canada
G.L. Pilbratt
European Space Agency (ESA)
H. Walker
STFC Rutherford Appleton Laboratory
C. Waelkens
KU Leuven
Astrophysical Journal Letters
2041-8205 (ISSN) 2041-8213 (eISSN)
Vol. 791 1 L11Subject Categories (SSIF 2011)
Astronomy, Astrophysics and Cosmology
DOI
10.1088/2041-8205/791/1/l11