Spitzer Observations of Eta Corvi : Evidence at ~1 Gyr for an LHB-Like Delivery of Organics & Water-Rich Material to the THZ of a Sun-Like Star

Details Spitzer Observations of Eta Corvi : Evidence at ~1 Gyr for an LHB-Like Delivery of Organics & Water-Rich Material to the THZ of a Sun-Like Star Spitzer Observations of Eta Corvi : Evidence at ~1 Gyr for an LHB-Like Delivery of Organics & Water-Rich Material to the THZ of a Sun-Like Star

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf..845l&link_type=abstract

EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.845

Physics

Scientific paper

We have analyzed the Spitzer IRS 5 - 35 um spectrum of the warm, ~360K circumstellar dust around the nearby MS star η Corvi (F2V, 1.4 ± 0.3 Gyr), a known IRAS excess object with a very high 24um excess luminosity for its age (Fig. 1). The Spitzer spectrum (Fig. 2) shows clear evidence for warm, water- and carbon-rich dust at ~ 3 AU from the central star, uncoupled and in a separate reservoir from the system's extended sub-mm dust ring at 150 ± 20 AU [2,3] (Figs. 1 & 3). Spectral features similar in kind and amplitude to those found for ultra-primitive material in ISO HD100546 spectra were found (water ice & gas, olivines & pyroxenes, amorphous carbon and metal sulfides), in addition to emissions due to impact produced silica and high temperature/pressure carbonaceous phases [4]. A large amount, at least 3 x 1019 kg, of 0.1 - 1000 μm warm dust is present, in a roughly collisional equilibrium distribution with dn/da ~ a-3.5. This is the equivalent of a 140 km radius asteroid of 2.5 g cm-3 density or a "comet" of 260 km radius and 0.40 g cm-3 density. If we allow for particles larger than 1 cm, the mass present increases by (largest particle size/1000 μm)0.5, and the equivalent parent body radius increases by the 0.167th power [4].

Affiliated with

Also associated with

No associations

Rating

Spitzer Observations of Eta Corvi : Evidence at ~1 Gyr for an LHB-Like Delivery of Organics & Water-Rich Material to the THZ of a Sun-Like Star does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Spitzer Observations of Eta Corvi : Evidence at ~1 Gyr for an LHB-Like Delivery of Organics & Water-Rich Material to the THZ of a Sun-Like Star, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spitzer Observations of Eta Corvi : Evidence at ~1 Gyr for an LHB-Like Delivery of Organics & Water-Rich Material to the THZ of a Sun-Like Star will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1480958