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

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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.
© ESO, 2010. Artículo firmado por 49 autores.
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Aumann, H. H., Beichman, C. A., Gillett, F. C., et al. 1984, ApJ, 278, L23 Backman, D. E., & Paresce, F. 1993, in Protostars and Planets III, ed. E. H. Levy, & J. I. Lunine (Tucson: Univ. Arizona Press), 1253 Beichman, C. A., Bryden, G., Stapelfeldt, K. R., et al. 2006, ApJ, 652, 1674 Brott, I., & Hauschildt, P. H. 2005, ESA SP-576, C. Turon, ed. K. S. O’Flaherty, & M. A. C. Perryman, 565 Bryden, G., Beichman, C. A., Carpenter, J. M., et al. 2009, ApJ, 705, 1226 Dole, H., Le Floc’h, E., Pérez González, P. G., et al. 2004, ApJS, 154, 87 Decin, G., Dominik, C., Waters, L. B. F. M., & Waelkens, C. 2003, ApJ, 598, 636 Griffin, M. J., et al. 2010, A&A, 518, L3 Habing, H. J., Dominik, C., Jourdain de Muizon, M., et al. 2001, A&A 365, 545 Hines, D. C., Schneider, G., Hollenbach, D., et al. 2007, ApJ, 671, L165 Kalas, P., Graham, J. R., Chiang, E., et al. 2008, Science, 322, 1345 Liseau, R., et al. 2010, A&A, 518, L132 Matthews, B., et al. 2010, A&A, 518, L135 Pilbratt, G. L., et al. 2010, A&A, 518, L1 Poglitsch, A., et al. 2010, A&A, 518, L2 Stapelfeldt, K. R., Holmes, E. K., Chen, C., et al. 2004, ApJS, 154, 458 Stern, S. A. 1996, A&A, 310, 999 Su, K. Y. L., Rieke, G. H., Stansberry, J. A., et al. 2006, ApJ, 653, 675 Trilling, D. E., Bryden, G., Beichman, C. A., et al. 2008, ApJ, 674, 1086 Wyatt, M. C., Dermott, S. F., Telesco, C. M., et al. 1999, ApJ, 527, 918