@article{discovery10093767, publisher = {IOP PUBLISHING LTD}, volume = {791}, month = {August}, journal = {The Astrophysical Journal Letters}, number = {1}, year = {2014}, title = {Extreme conditions in a close analog to the young Solar System: Herschel observations of ? Eridani}, note = {This version is the version of record. For information on re-use, please refer to the publisher's terms and conditions.}, url = {https://doi.org/10.1088/2041-8205/791/1/L11}, abstract = {Far-infrared Herschel images of the epsilon Eridani system, seen at a fifth of the Sun's present age, resolve two belts of debris emission. Fits to the 160 {\ensuremath{\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 {$\approx$}10\% brighter than the north end in the PACS+SPIRE images at 160, 250, and 350 {\ensuremath{\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 (ec {$\approx$} 0.03-0.3). Compared to the asteroid and Kuiper Belts of the young Sun, the epsilon 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 {$\approx$}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 epsilon Eri b, at semi-major axis {$\approx$}3 AU.}, author = {Greaves, JS and Sibthorpe, B and Acke, B and Pantin, EE and Vandenbussche, B and Olofsson, G and Dominik, C and Barlow, MJ and Bendo, GJ and Blommaert, JADL and Brandeker, A and De Vries, BL and Dent, WRF and Di Francesco, J and Fridlund, M and Gear, WK and Harvey, PM and Hogerheijde, MR and Holland, WS and Ivison, RJ and Liseau, R and Matthews, BC and Pilbratt, GL and Walker, HJ and Waelkens, C}, keywords = {circumstellar matter; planet-disk interactions; stars: individual (epsilon Eridani)} }