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Cold DUst around NEarby Stars (DUNES). First results. A resolved exo-Kuiper belt around the solar-like star ζ2 Ret

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Montes Gutiérrez, David and otros, ... (2010) Cold DUst around NEarby Stars (DUNES). First results. A resolved exo-Kuiper belt around the solar-like star ζ2 Ret. Astronomy & Astrophysics, 518 . ISSN 0004-6361

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Official URL: http://dx.doi.org/10.1051/0004-6361/201014594


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Abstract

We present the first far-IR observations of the solar-type stars δ Pav, HR 8501, 51 Peg and ζ^2 Ret, taken within the context of the DUNES Herschel open time key programme (OTKP). This project uses the PACS and SPIRE instruments with the objective of studying infrared excesses due to exo-Kuiper belts around nearby solar-type stars. The observed 100 μm fluxes from δ Pav, HR 8501, and 51 Peg agree with the predicted photospheric fluxes, excluding debris disks brighter than L_dust/L_* ~ 5 x 10^-7 (1σ level) around those stars. A flattened, disk-like structure with a semi-major axis of ~100 AU in size is detected around ζ2 Ret. The resolved structure suggests the presence of an eccentric dust ring, which we interpret as an exo-Kuiper belt with L_dust/L_* ≈ 10^-5.


Item Type:Article
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© ESO, 2010. Artículo firmado por 49 autores.

Uncontrolled Keywords:Main-sequence stars; Debris disks; Planets
Subjects:Sciences > Physics > Astrophysics
Sciences > Physics > Astronomy
ID Code:37835
Deposited On:24 May 2016 15:23
Last Modified:10 Dec 2018 15:05

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