SIMBAD references

2013A&A...555A..11E - Astronomy and Astrophysics, volume 555A, 11-11 (2013/7-1)

DUst around NEarby stars. The survey observational results.

EIROA C., MARSHALL J.P., MORA A., MONTESINOS B., ABSIL O., AUGEREAU J.C., BAYO A., BRYDEN G., DANCHI W., DEL BURGO C., ERTEL S., FRIDLUND M., HERAS A.M., KRIVOV A.V., LAUNHARDT R., LISEAU R., LOEHNE T., MALDONADO J., PILBRATT G.L., ROBERGE A., RODMANN J., SANZ-FORCADA J., SOLANO E., STAPELFELDT K., THEBAULT P., WOLF S., ARDILA D., AREVALO M., BEICHMANN C., FARAMAZ V., GONZALEZ-GARCIA B.M., GUTIERREZ R., LEBRETON J., MARTINEZ-ARNAIZ R., MEEUS G., MONTES D., OLOFSSON G., SU K.Y.L., WHITE G.J., BARRADO D., FUKAGAWA M., GRUEN E., KAMP I., LORENTE R., MORBIDELLI A., MUELLER S., MUTSCHKE H., NAKAGAWA T., RIBAS I. and WALKER H.

Abstract (from CDS):

Debris discs are a consequence of the planet formation process and constitute the fingerprints of planetesimal systems. Their solar system counterparts are the asteroid and Edgeworth-Kuiper belts. The DUNES survey aims at detecting extra-solar analogues to the Edgeworth-Kuiper belt around solar-type stars, putting in this way the solar system into context. The survey allows us to address some questions related to the prevalence and properties of planetesimal systems. We used Herschel/PACS to observe a sample of nearby FGK stars. Data at 100 and 160µm were obtained, complemented in some cases with observations at 70µm, and at 250, 350 and 500µm using SPIRE. The observing strategy was to integrate as deep as possible at 100µm to detect the stellar photosphere. Debris discs have been detected at a fractional luminosity level down to several times that of the Edgeworth-Kuiper belt. The incidence rate of discs around the DUNES stars is increased from a rate of ∼12.1%±5% before Herschel to ∼20.2%±2%. A significant fraction (∼52%) of the discs are resolved, which represents an enormous step ahead from the previously known resolved discs. Some stars are associated with faint far-IR excesses attributed to a new class of cold discs. Although it cannot be excluded that these excesses are produced by coincidental alignment of background galaxies, statistical arguments suggest that at least some of them are true debris discs. Some discs display peculiar SEDs with spectral indexes in the 70-160µm range steeper than the Rayleigh-Jeans one. An analysis of the debris disc parameters suggests that a decrease might exist of the mean black body radius from the F-type to the K-type stars. In addition, a weak trend is suggested for a correlation of disc sizes and an anticorrelation of disc temperatures with the stellar age.

Abstract Copyright:

Journal keyword(s): circumstellar matter - planetary systems - infrared: stars

VizieR on-line data: <Available at CDS (J/A+A/555/A11): table2.dat table3a.dat table3b.dat table3c.dat table3d.dat table4.dat table5.dat table10.dat table12.dat table14.dat table15.dat>

Simbad objects: 147

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2019.09.19-21:49:18

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