Dust disks detected Herschel's

In addition, they write about the discovery of infrared excess at 70 microns in 51 Pegasi.

An interesting story about Zeta Reticuli.
http://en.wikipedia.org/wiki/Betty_and_Barney_Hill_abduction#.22Deciphering.22_the_star_map

Interesting, but more comedy than science.

The disk to q1 Eridani has been known for quite some time. I don't recall about Zeta2 Reticuli however.

I didn't see anything about an excess at 51 Pegasi.

Sirius_Alpha wrote:

The disk to q1 Eridani has been known for quite some time.

I was wrong.
http://exoplanets.jpl.nasa.gov/CES_Fair_208_Talks/32_krist_hst_debris_disks_talk.pdf

Sirius_Alpha wrote:

I don't recall about Zeta2 Reticuli however.

Infrared excess discovery Spitzer, but Herschel first time resolved him.

http://herschel.esac.esa.int/SDP_wkshops/presentations/IR/35_Fedele_DUNES_SDP2009.pdf

Quote :

- Debris dust detected in 2 (+1?) / 5 sources
- HIP15371: (candidate) exo-solar EKB analogue

Sirius_Alpha wrote:

I didn't see anything about an excess at 51 Pegasi.

Quote :

F (Spitzer, 70 micron) 28.1 mJy

F (predicted, 100 micron) 10.8 mJy
F (observed, 100 micron) 12 mJy

F (predicted, 100 micron) < F (observed, 100 micron)

Not very interesting, I am sure the Greys found it millennia ago =P Lolz

That is quite interesting.

four additional disk resolved by Herschel around nearby stars
http://herschel.esac.esa.int/SDP_wkshops/presentations/IR/36_Greaves_DEBRIS_SDP2009.pdf

renamed theme

Zeta Tucanae is included in the 10 stars who have the search for analogues of the Earth on HARSP.

If you listen to the presentation associated with the pdf linked in the first post in this thread (see this thread in Extrasolar Mechanics), 51 Pegasi is mentioned as not having significant infrared excess.

Resolving the cold debris disc around a planet-hosting star: PACS photometric imaging observations of q1 Eri (HD10647, HR506)
http://arxiv.org/abs/1005.3137

Abstract wrote:

About two dozen exo-solar debris systems have been spatially resolved. These debris discs commonly display a variety of structural features such as clumps, rings, belts, eccentric distributions and spiral patterns. In most cases, these features are believed to be formed, shaped and maintained by the dynamical influence of planets orbiting the host stars. In very few cases has the presence of the dynamically important planet(s) been inferred from direct observation. The solar-type star q1 Eri is known to be surrounded by debris, extended on scales of < 30''. The star is known to host at least one planet, albeit on an orbit far too small to make it responsible for structures at distances of tens to hundreds of AU. The aim of the present investigation is twofold: to determine the optical and material properties of the debris and to infer the spatial distribution of the dust, which may hint at the presence of additional planets. The photodetector array camera and spectrometer (PACS) aboard the Herschel Space Observatory allows imaging observations in the far infrared at unprecedented resolution, i.e. at better than 6'' to 12'' over the wavelength range of 60 {\mu}m to 210 {\mu}m. Together with the results from ground-based observations, these spatially resolved data can be modelled to determine the nature of the debris and its evolution more reliably than would be possible from unresolved data alone. For the first time has the q1 Eri disc been resolved at far infrared wavelengths. The PACS observations at 70, 100 and 160 {\mu}m reveal an oval image showing a disc-like structure in all bands, the size of which increases with wavelength. Assuming a circular shape yields the inclination of its equatorial plane with respect to that of the sky, i > 53deg. The results of image de-convolution indicate that i likely is larger than 63deg, where 90deg corresponds to an edge-on disc. {abridged}

Cold dust around nearby stars (DUNES). First results: A resolved exo-Kuiper belt around the solar-like star zeta^2 Ret
http://arxiv.org/abs/1005.3151

Abstract wrote:

We present the first far-IR observations of the solar-type stars delta Pav, HR 8501, 51 Peg and zeta^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 um fluxes from delta Pav, HR 8501, and 51 Peg agree with the predicted photospheric fluxes, excluding debris disks brighter than Ldust/Lstar ~ 5 x 10^-7 (1 sigma level) around those stars. A flattened, disk-like structure with a semi-major axis of ~ 100 AU in size is detected around zeta^2 Ret. The resolved structure suggests the presence of an eccentric dust ring, which we interpret as an exo-Kuiper belt with Ldust/Lstar ~ 10^-5.

Can combine with this topic?
https://solar-flux.forumotion.com/extrasolar-news-and-discoveries-f2/dust-disks-detected-herschel-s-t571.htm

Quote :

In the Solar System, the asteroid and Kuiper belts are examples of debris systems; in particular, the Kuiper belt has an estimated dust luminosity Ldust/L*=10−7-10−6 (Stern 1996).

Quote :

The observed 100 μm fluxes from delta Pav, HR 8501, and 51 Peg agree with the predicted
photospheric fluxes, excluding debris disks brighter than Ldust/L* = 5 × 10−7 (1 sigma level) around those stars

Quote :

The resolved structure suggests the presence of an eccentric dust ring, which we
interpret as an exo-Kuiper belt with Ldust/L* = 10−5

Ie analogues of the Kuiper belt are found only in 25% of (1 of 4) stars similar to the Sun?

Borislav wrote:

Can combine with this topic?https://solar-flux.forumotion.com/extrasolar-news-and-discoveries-f2/dust-disks-detected-herschel-s-t571.htm

I knew we had discussed these two systems before but couldn't find the thread. Thanks! Merged.

Thank you.

http://arxiv.org/abs/1005.3543

Quote :

The Vega Debris Disc: A view from Herschel
We present five band imaging of the Vega debris disc obtained using the Herschel Space Observatory. These data span a wavelength range of 70-500 um with full-width half-maximum angular resolutions of 5.6-36.9". The disc is well resolved in all bands, with the ring structure visible at 70 and 160 um. Radial profiles of the disc surface brightness are produced, and a disc radius of 11" (~ 85 AU) is determined. The disc is seen to have a smooth structure thoughout the entire wavelength range, suggesting that the disc is in a steady state, rather than being an ephemeral structure caused by the recent collision of two large planetesimals.

Big Herschel release.
http://www.aanda.org/index.php?option=com_toc&url=/articles/aa/abs/2010/10/contents/contents.html


Most of them are about galactic astronomy, but a few are pertinent to disk and planetary science, some of which have been reported here before.

• Herschel-PACS observation of the 10 Myr old T Tauri disk TW Hya
  
• GAS in Protoplanetary Systems (GASPS)
  
• First results of the Herschel key program “Dust, Ice and Gas In Time” (DIGIT): Dust and gas spectroscopy of HD 100546
  
• The Vega debris disc: A view from Herschel
  
• Cold DUst around NEarby Stars (DUNES). First results. A resolved exo-Kuiper belt around the solar-like star ζ2 Ret
  
• Resolving the cold debris disc around a planet-hosting star. PACS photometric imaging observations of q1  Eridani (HD 10647, HR 506)
  
• The β Pictoris disk imaged by Herschel PACS and SPIRE
  
• A search for debris disks in the Herschel-ATLAS
  
• Resolving debris discs in the far-infrared: Early highlights from the DEBRIS survey
  
• “TNOs are Cool”: A survey of the trans-Neptunian region. I. Results from the Herschel science demonstration phase (SDP)
  
• "THOs are Cool": A survey of the trans-Neptunian region. II. The thermal lightcurve of (136108) Haumea
  
• “TNOs are Cool”: A survey of the trans-Neptunian region. III. Thermophysical properties of 90482 Orcus and 136472 Makemake
  
• First results of Herschel-PACS observations of Neptune
  

•“TNOs are Cool”: A survey of the trans-Neptunian region. I. Results from the Herschel science demonstration phase (SDP)
The link links back to the forum, not to a website.

Thanks! I've corrected it.

Great result!

http://iaus276.oato.inaf.it/IAUS_276/Program/Oral/session1/Eiroa.pdf

So there's an inferred planet shaping the dust disc at ζ² Ret? Nice...

"HERSCHEL images extrasolar analogue of the Kuiper belt"

http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=50252

It's about Fomalhaut !