Discovery of an 86 AU radius debris ring around HD 181327

Simple item page
dc.contributor.authorSchneider, Glenn
dc.contributor.authorSilverstone, Murray D.
dc.contributor.authorHines, Dean C.
dc.contributor.authorAugereau, Jean-Charles
dc.contributor.authorPinte, Christophe
dc.contributor.authorMenard, Francois
dc.contributor.authorKrist, John
dc.contributor.authorClampin, Mark
dc.contributor.authorGrady, Carol
dc.contributor.authorGolimowski, David
dc.contributor.authorArdila, David
dc.contributor.authorHenning, Thomas
dc.contributor.authorWolf, Sebastian
dc.contributor.authorRodmann, Jens
dc.contributor.otherUniversity of Arizona
dc.contributor.otherNational Aeronautics & Space Administration (NASA)
dc.contributor.otherNASA Goddard Space Flight Center
dc.contributor.otherEureka Scientific
dc.contributor.otherJohns Hopkins University
dc.contributor.otherMax Planck Society
dc.contributor.otherUniversity of Alabama Tuscaloosa
dc.date.accessioned2019-06-13T17:58:37Z
dc.date.available2019-06-13T17:58:37Z
dc.date.issued2006
dc.description.abstractHST NICMOS PSF-subtracted coronagraphic observations of HD 181327 have revealed the presence of a ringlike disk of circumstellar debris seen in 1.1 mu m light scattered by the disk grains, surrounded by a diffuse outer region of lower surface brightness. The annular disk appears to be inclined by 31.degrees 7 +/- 1.degrees 6 from face-on, with the disk major-axis P. A. at 107 degrees +/- 2 degrees. The total 1.1 mu m flux density of the light scattered by the disk (at 1."2 < r < 5."0) of 9.6 +/- 0.8 mJy is 0.17% +/- 0.015% of the starlight. Seventy percent of the light from the scattering grains appears to be confined in a 36 AU wide annulus centered on the peak of the radial surface brightness (SB) profile 86.3 +/- 3.9 AU from the star, well beyond the characteristic radius of thermal emission estimated from IRAS and Spitzer flux densities, assuming black-body grains (approximate to 22 AU). The 1.1 mu m light scattered by the ring (1) appears bilaterally symmetric, (2) exhibits directionally preferential scattering well represented by a Henyey-Greenstein scattering phase function with g(HG) = 0.30 +/- 0.03, and (3) has a median SB (over all azimuth angles) at the 86.3 AU radius of peak SB of 1.00 +/- 0.07 mJy arcsec(-2). No photocentric offset is seen in the ring relative to the position of the central star. A low SB diffuse halo is seen in the NICMOS image to a distance of similar to 4". Deeper 0.6 mu m Hubble Space Telescope (HST) ACS PSF-subtracted coronagraphic observations reveal a faint (V approximate to 21.5 mag arcsec(-2)) outer nebulosity at 4" < r < 9", asymmetrically brighter to the north of the star. We discuss models of the disk and properties of its grains, from which we infer a maximum vertical scale height of 4-8 AU at the 87.6 AU radius of maximum surface density, and a total maximum dust mass of collisionally replenished grains with minimum grain sizes of approximate to 1 mu m of approximate to 4M(Moon).en_US
dc.format.mimetypeapplication/pdf
dc.identifier.citationSchneider, G., et al. (2006): Discovery of an 86 AU Radius Debris Ring around HD 181327. The Astronomical Journal, 650(1): https://doi.org/10.1086/506507
dc.identifier.doi10.1086/506507
dc.identifier.orcidhttps://orcid.org/0000-0001-7841-3452
dc.identifier.orcidhttps://orcid.org/0000-0002-1493-300X
dc.identifier.orcidhttps://orcid.org/0000-0002-2725-6415
dc.identifier.orcidhttps://orcid.org/0000-0002-2564-8116
dc.identifier.urihttp://ir.ua.edu/handle/123456789/5744
dc.languageEnglish
dc.language.isoen_US
dc.publisherIOP Publishing
dc.subjectcircumstellar matter
dc.subjectinfrared : stars
dc.subjectplanetary systems : protoplanetary disks
dc.subjectstars : individual (HD 181327)
dc.subjectCIRCUMSTELLAR DISK
dc.subjectDUST DISTRIBUTION
dc.subjectASYMMETRIES
dc.subjectPLANETS
dc.subjectDENSITY
dc.subjectSYSTEM
dc.subjectIMAGES
dc.subjectSTARS
dc.subjectDWARF
dc.subjectMODEL
dc.subjectAstronomy & Astrophysics
dc.titleDiscovery of an 86 AU radius debris ring around HD 181327en_US
dc.typetext
dc.typeArticle
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
MSilverstone_Discovery of an 86 AU Radius Debris Ring around HD 181327_Physics and Astronomy.pdf
Size:
1.63 MB
Format:
Adobe Portable Document Format
Description:
main article
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.27 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Research and Publications - Department of Physics & Astronomy