Extreme Conditions in a Close Analog to the Young Solar System: Herschel Observations of ∈ Eridani
Artikel i vetenskaplig tidskrift, 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.










stars: individual (is an element of Eridani)

planet-disk interactions


circumstellar matter


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

Stockholms universitet

C. Dominik

Radboud Universiteit

Anton Pannekoek Institute for Astronomy

M. J. Barlow

University College London (UCL)

G. J. Bendo

University of Manchester

Jadl Blommaert

Astronomy and Astrophysics Research Group

KU Leuven

A. Brandeker

Stockholms universitet

B. L. de Vries

Stockholms universitet

W. R. F. Dent

Atacama Large Millimeter-submillimeter Array (ALMA)

J. Di Francesco

National Research Council Canada

M. Fridlund

Deutsches Zentrums für Luft- und Raumfahrt (DLR)

European Space Research and Technology Centre (ESA ESTEC)

W. K. Gear

Cardiff University

P. M. Harvey

The University of Texas at Austin

M. R. Hogerheijde

Universiteit Leiden

W. S. Holland

University of Edinburgh

Royal Observatory

R. J. Ivison

University of Edinburgh

European Southern Observatory (ESO)

René Liseau

Chalmers, Rymd- och geovetenskap, Radioastronomi och astrofysik

B. C. Matthews

University of Victoria

National Research Council Canada

G.L. Pilbratt

European Space Research and Technology Centre (ESA ESTEC)

H. Walker

STFC Rutherford Appleton Laboratory

C. Waelkens

KU Leuven

Astrophysical Journal Letters

2041-8205 (ISSN) 2041-8213 (eISSN)

Vol. 791 1 L11


Astronomi, astrofysik och kosmologi



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