2012
DOI: 10.1088/0004-637x/747/2/93
|View full text |Cite
|
Sign up to set email alerts
|

SPITZEREVIDENCE FOR A LATE-HEAVY BOMBARDMENT AND THE FORMATION OF UREILITES IN η CORVI At ∼1 Gyr

Abstract: We have analyzed Spitzer and NASA/IRTF 2-35 μm spectra of the warm, ∼350 K circumstellar dust around the nearby MS star η Corvi (F2V, 1.4 ± 0.3 Gyr). The spectra show clear evidence for warm, water-and carbon-rich dust at ∼3 AU from the central star, in the system's terrestrial habitability zone. Spectral features due to ultraprimitive cometary material were found, in addition to features due to impact produced silica and high-temperature carbonaceous phases. At least 9 × 10 18 kg of 0.1-100 μm warm dust is pr… Show more

Help me understand this report
View preprint versions

Search citation statements

Order By: Relevance

Paper Sections

Select...
4
1

Citation Types

8
102
1

Year Published

2012
2012
2018
2018

Publication Types

Select...
5
3

Relationship

0
8

Authors

Journals

citations
Cited by 92 publications
(111 citation statements)
references
References 161 publications
(347 reference statements)
8
102
1
Order By: Relevance
“…Dusty debris disks orbiting other stars than the Sun were first detected by their excess emission in the midor far-infrared (IR), and could then be imaged at visible to A&A 555, A146 (2013) submillimeter wavelengths. A few warm disks comparable to the zodiacal cloud have been found by space observatories around mature stars via their photometric excess emission at mid-IR wavelengths (Beichman et al 2005;Lawler et al 2009;Lisse et al 2012); but their characterization suffers from insufficient spatial resolution and large photometric uncertainties.…”
Section: Introductionmentioning
confidence: 99%
“…Dusty debris disks orbiting other stars than the Sun were first detected by their excess emission in the midor far-infrared (IR), and could then be imaged at visible to A&A 555, A146 (2013) submillimeter wavelengths. A few warm disks comparable to the zodiacal cloud have been found by space observatories around mature stars via their photometric excess emission at mid-IR wavelengths (Beichman et al 2005;Lawler et al 2009;Lisse et al 2012); but their characterization suffers from insufficient spatial resolution and large photometric uncertainties.…”
Section: Introductionmentioning
confidence: 99%
“…Defrère et al 2011), MIDI/VISIR (e.g. Smith et al 2009b), or using their mid-infrared spectra with Spitzer (Olofsson et al 2012;Lisse et al 2012Lisse et al , 2009). Such sources have been compared to the solar system's exozodiacal cloud, but in general are several orders of magnitude brighter, for example η Corvi is 1250 ± 260 times brighter than the solar system's exozodiacal dust cloud at 10 μm (Millan-Gabet et al 2011).These observations can be modelled to determine estimates on the geometry, mass, position and grain properties.…”
Section: Introductionmentioning
confidence: 99%
“…A well studied example is the 450 Myr old A-star Vega (Absil et al 2006(Absil et al , 2008Defrère et al 2011), where the best fit model found using Bayesian statistics to assess a grid of models, suggests that the emission is dominated by small grains (<1 μm) in a 10 −9 M ⊕ ring between ∼0.1−0.3 AU (Defrère et al 2011). More detailed compositional information can be determined for the handful of brighter sources detected by their Spitzer spectra in the mid-infrared, for example Olofsson et al (2012); Lisse et al (2012), amongst others.…”
Section: Introductionmentioning
confidence: 99%
See 1 more Smart Citation
“…For example, SiO masers are detected in the circumstellar regions around asymptotic giant branch (AGB) stars, and their maser lines are found to originate from regions below the dust evaporation radius (Habing 1996). More recently, gas phase SiO has been detected in the debris disk around η Corvi (Lisse et al 2012). Hence it should be possible to detect accumulated SiO even if there are dust grains present.…”
Section: Survival Of Sio In the A V =1 Regionmentioning
confidence: 99%