Extreme conditions in a close analog to the young solar system: Herschel observations of ε Eridani

J. S. Greaves; B. Sibthorpe; B. Acke; E. E. Pantin; B. Vandenbussche; G. Olofsson; C. Dominik; M. J. Barlow; G. J. Bendo; J. A.D.L. Blommaert; A. Brandeker; B. L. De Vries; W. R.F. Dent; J. Di Francesco; M. Fridlund; W. K. Gear; P. M. Harvey; M. R. Hogerheijde; W. S. Holland; R. J. Ivison; R. Liseau; B. C. Matthews; G. L. Pilbratt; H. J. Walker; C. Waelkens

doi:10.1088/2041-8205/791/1/L11

Extreme conditions in a close analog to the young solar system: Herschel observations of ε Eridani

J. S. Greaves
, B. Sibthorpe
, B. Acke
, E. E. Pantin
, B. Vandenbussche
, G. Olofsson
, C. Dominik
, M. J. Barlow
, G. J. Bendo
, J. A.D.L. Blommaert
, A. Brandeker
, B. L. De Vries
, W. R.F. Dent
, J. Di Francesco
, M. Fridlund
, W. K. Gear
, P. M. Harvey
, M. R. Hogerheijde
, W. S. Holland
, R. J. Ivison

R. Liseau, B. C. Matthews, G. L. Pilbratt, H. J. Walker, C. Waelkens

University of St Andrews
UK Astronomy Technology Centre
SRON Netherlands Institute for Space Research
KU Leuven
CEA Saclay
Stockholm University
University of Amsterdam
Radboud University
University College London
University of Manchester
Vrije Universiteit Brussel
Joint ALMA Observatory
National Research Council Canada
European Space Research and Technology Centre (ESTEC)
Institute of Planetary Research
Cardiff University
University of Texas at Austin
Leiden University
University of Edinburgh, Institute for Astronomy
ESO
Onsala Space Observatory
University of Victoria
RAL Space, Science and Technology Facilities Council, Rutherford Appleton Laboratory

Research output: Contribution to a Journal (Peer & Non Peer) › Article › peer-review

40 Citations (Scopus)

Abstract

Far-infrared Herschel images of the ε Eridani system, seen at a fifth of the Sun's present age, resolve two belts of debris emission. Fits to the 160 μm PACS image yield radial spans for these belts of 12-16 and 54-68 AU. The south end of the outer belt is ≈10% brighter than the north end in the PACS+SPIRE images at 160, 250, and 350 μm, 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 ≈ 0.03-0.3). Compared to the asteroid and Kuiper Belts of the young Sun, the ε 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 ≈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 ε Eri b, at semi-major axis ≈3 AU.

Original language	English
Article number	L11
Journal	Astrophysical Journal Letters
Volume	791
Issue number	1
DOIs	https://doi.org/10.1088/2041-8205/791/1/L11
Publication status	Published - 10 Aug 2014
Externally published	Yes

Keywords

circumstellar matter
planet-disk interactions
stars: individual (ε Eridani)

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10.1088/2041-8205/791/1/L11

Cite this

Greaves, J. S., Sibthorpe, B., Acke, B., Pantin, E. E., Vandenbussche, B., Olofsson, G., Dominik, C., Barlow, M. J., Bendo, G. J., Blommaert, J. A. D. L., Brandeker, A., De Vries, B. L., Dent, W. R. F., Di Francesco, J., Fridlund, M., Gear, W. K., Harvey, P. M., Hogerheijde, M. R., Holland, W. S., ... Waelkens, C. (2014). Extreme conditions in a close analog to the young solar system: Herschel observations of ε Eridani. Astrophysical Journal Letters, 791(1), Article L11. https://doi.org/10.1088/2041-8205/791/1/L11

@article{91dcb98cbf1c4193b19201acecbbb2d2,

title = "Extreme conditions in a close analog to the young solar system: Herschel observations of ε Eridani",

abstract = "Far-infrared Herschel images of the ε Eridani system, seen at a fifth of the Sun's present age, resolve two belts of debris emission. Fits to the 160 μm PACS image yield radial spans for these belts of 12-16 and 54-68 AU. The south end of the outer belt is ≈10\% brighter than the north end in the PACS+SPIRE images at 160, 250, and 350 μm, 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 ≈ 0.03-0.3). Compared to the asteroid and Kuiper Belts of the young Sun, the ε 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 ≈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 ε Eri b, at semi-major axis ≈3 AU.",

keywords = "circumstellar matter, planet-disk interactions, stars: individual (ε Eridani)",

author = "Greaves, \{J. S.\} and B. Sibthorpe and B. Acke and Pantin, \{E. E.\} and B. Vandenbussche and G. Olofsson and C. Dominik and Barlow, \{M. J.\} and Bendo, \{G. J.\} and Blommaert, \{J. A.D.L.\} and A. Brandeker and \{De Vries\}, \{B. L.\} and Dent, \{W. R.F.\} and \{Di Francesco\}, J. and M. Fridlund and Gear, \{W. K.\} and Harvey, \{P. M.\} and Hogerheijde, \{M. R.\} and Holland, \{W. S.\} and Ivison, \{R. J.\} and R. Liseau and Matthews, \{B. C.\} and Pilbratt, \{G. L.\} and Walker, \{H. J.\} and C. Waelkens",

year = "2014",

month = aug,

day = "10",

doi = "10.1088/2041-8205/791/1/L11",

language = "English",

volume = "791",

journal = "Astrophysical Journal Letters",

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Greaves, JS, Sibthorpe, B, Acke, B, Pantin, EE, Vandenbussche, B, Olofsson, G, Dominik, C, Barlow, MJ, Bendo, GJ, Blommaert, JADL, Brandeker, A, De Vries, BL, Dent, WRF, Di Francesco, J, Fridlund, M, Gear, WK, Harvey, PM, Hogerheijde, MR, Holland, WS, Ivison, RJ, Liseau, R, Matthews, BC, Pilbratt, GL, Walker, HJ & Waelkens, C 2014, 'Extreme conditions in a close analog to the young solar system: Herschel observations of ε Eridani', Astrophysical Journal Letters, vol. 791, no. 1, L11. https://doi.org/10.1088/2041-8205/791/1/L11

TY - JOUR

T1 - Extreme conditions in a close analog to the young solar system

T2 - Herschel observations of ε Eridani

AU - Greaves, J. S.

AU - Sibthorpe, B.

AU - Acke, B.

AU - Pantin, E. E.

AU - Vandenbussche, B.

AU - Olofsson, G.

AU - Dominik, C.

AU - Barlow, M. J.

AU - Bendo, G. J.

AU - Blommaert, J. A.D.L.

AU - Brandeker, A.

AU - De Vries, B. L.

AU - Dent, W. R.F.

AU - Di Francesco, J.

AU - Fridlund, M.

AU - Gear, W. K.

AU - Harvey, P. M.

AU - Hogerheijde, M. R.

AU - Holland, W. S.

AU - Ivison, R. J.

AU - Liseau, R.

AU - Matthews, B. C.

AU - Pilbratt, G. L.

AU - Walker, H. J.

AU - Waelkens, C.

PY - 2014/8/10

Y1 - 2014/8/10

N2 - Far-infrared Herschel images of the ε Eridani system, seen at a fifth of the Sun's present age, resolve two belts of debris emission. Fits to the 160 μm PACS image yield radial spans for these belts of 12-16 and 54-68 AU. The south end of the outer belt is ≈10% brighter than the north end in the PACS+SPIRE images at 160, 250, and 350 μm, 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 ≈ 0.03-0.3). Compared to the asteroid and Kuiper Belts of the young Sun, the ε 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 ≈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 ε Eri b, at semi-major axis ≈3 AU.

AB - Far-infrared Herschel images of the ε Eridani system, seen at a fifth of the Sun's present age, resolve two belts of debris emission. Fits to the 160 μm PACS image yield radial spans for these belts of 12-16 and 54-68 AU. The south end of the outer belt is ≈10% brighter than the north end in the PACS+SPIRE images at 160, 250, and 350 μm, 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 ≈ 0.03-0.3). Compared to the asteroid and Kuiper Belts of the young Sun, the ε 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 ≈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 ε Eri b, at semi-major axis ≈3 AU.

KW - circumstellar matter

KW - planet-disk interactions

KW - stars: individual (ε Eridani)

UR - https://www.scopus.com/pages/publications/84905251583

U2 - 10.1088/2041-8205/791/1/L11

DO - 10.1088/2041-8205/791/1/L11

M3 - Article

AN - SCOPUS:84905251583

SN - 2041-8205

VL - 791

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 1

M1 - L11

ER -

Extreme conditions in a close analog to the young solar system: Herschel observations of ε Eridani

Abstract

Keywords

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