DEBRIS DISKS IN<i>KEPLER</i>EXOPLANET SYSTEMS

Lawler, Samantha; Gladman, Brett

doi:10.1088/0004-637x/752/1/53

Cited by 24 publications

(26 citation statements)

References 34 publications

(65 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…an optically thin environment (dust edge at 0.4 AU). Additionally, we adopt a single size and density for the dust particles of 10 μm and 3.3 g cm −3 (following Lawler & Gladman 2012). However, if the same dust is responsible for the excess emission and the UXOR variability, then clearly the size of the dust should be (sub-)micron sized.…”

Section: Spectral Energy Distributionmentioning

confidence: 99%

Active asteroid belt causes the UXOR phenomenon in RZ Piscium

Wit

Гринин

Potravnov

et al. 2013

A&A

View full text Add to dashboard Cite

We report the discovery of mid-infrared excess emission in the young object RZ Psc. The excess constitutes ∼8% of its L bol and is well fit by a single 500 K blackbody, implying a dust-free region within ∼0.7 AU for optically thick dust. The object displays dust obscuration events (UXOR behaviour) on a time scale that suggests dusty material on orbits of ∼0.5 AU. We also report a 12.4-year cyclical photometric variability that can be interpreted as caused by perturbations in the dust distribution. The system is characterized by a high inclination, marginal extinction (during bright photometric states), a single temperature for the warm dust, and an age estimate that puts the star beyond the formation stage. We propose that the dust occultation events present a dynamical view of an active asteroid belt whose collisional products sporadically obscure the central star.

show abstract

Section: Spectral Energy Distributionmentioning

confidence: 99%

Active asteroid belt causes the UXOR phenomenon in RZ Piscium

Wit

Гринин

Potravnov

et al. 2013

A&A

View full text Add to dashboard Cite

show abstract

“…Among these stars, a few dozen are also known to harbor planets (Lawler and Gladman 2012;Morales et al 2012;Bonsor et al 2013). …”

Section: Introductionmentioning

confidence: 99%

On the Incidence of Wise Infrared Excess Among Solar Analog, Twin, and Sibling Stars

Costa

Martins

Leão

et al. 2017

ApJ

View full text Add to dashboard Cite

This study presents a search for IR excess in the 3.4, 4.6, 12 and 22 µm bands in a sample of 216 targets, composed of solar sibling, twin and analog stars observed by the WISE mission. In general, an infrared excess suggests the existence of warm dust around a star. We detected 12 µm and/or 22 µm excesses at the 3σ level of confidence in five solar analog stars, corresponding to a frequency of 4.1 % of the entire sample of solar analogs analyzed, and in one out of 29 solar sibling candidates, confirming previous studies. The estimation of the dust properties shows that the sources with infrared excesses possess circumstellar material with temperatures that, within the uncertainties, are similar to that of the material found in the asteroid belt in our solar system. No photospheric flux excess was identified at the W1 (3.4 µm) and W2 (4.6 µm) WISE bands, indicating that, in the majority of stars of the present sample, no detectable dust is generated. Interestingly, among the sixty solar twin stars analyzed in this work, no WISE photospheric flux excess was detected. However, a null-detection excess does not necessarily indicate the absence of dust around a star because different causes, including dynamic processes and instrument limitations, can mask its presence.

show abstract

“…See also Lawler & Gladman (2012) for a similar work on the same topic. The sample of stars observed by Kepler is comprised of over 150 000 stars determined by the Kepler Input Catalog (KIC, Latham et al 2005;Batalha et al 2010), harboring mostly main sequence G type field dwarfs.…”

Section: Introductionmentioning

confidence: 95%

Herschel/PACS photometry of transiting-planet host stars with candidate warm debris disks

Merın

Ardila

Ribas

et al. 2014

A&A

View full text Add to dashboard Cite

Dust in debris disks is produced by colliding or evaporating planetesimals, which are remnants of the planet formation process. Warm dust disks, known by their emission at ≤24 µm, are rare (4% of FGK main sequence stars) and especially interesting because they trace material in the region likely to host terrestrial planets, where the dust has a very short dynamical lifetime. Statistical analyses of the source counts of excesses as found with the mid-IR Wide Field Infrared Survey Explorer (WISE) suggest that warm-dust candidates found for the Kepler transiting-planet host-star candidates can be explained by extragalactic or galactic background emission aligned by chance with the target stars. These statistical analyses do not exclude the possibility that a given WISE excess could be due to a transient dust population associated with the target. Here we report Herschel/PACS 100 and 160 micron follow-up observations of a sample of Kepler and non-Kepler transiting-planet candidates' host stars, with candidate WISE warm debris disks, aimed at detecting a possible cold debris disk in any one of them. No clear detections were found in any one of the objects at either wavelength. Our upper limits confirm that most objects in the sample do not have a massive debris disk like that in β Pic. We also show that the planet-hosting star WASP-33 does not have a debris disk comparable to the one around η Crv. Although the data cannot be used to rule out rare warm disks around the Kepler planet-hosting candidates, the lack of detections and the characteristics of neighboring emission found at far-IR wavelengths support an earlier result suggesting that most of the WISE-selected IR excesses around Kepler candidate host stars are likely due to either chance alignment with background IR-bright galaxies and/or to interstellar emission.

show abstract

DEBRIS DISKS INKEPLEREXOPLANET SYSTEMS

Cited by 24 publications

References 34 publications

Active asteroid belt causes the UXOR phenomenon in RZ Piscium

Active asteroid belt causes the UXOR phenomenon in RZ Piscium

On the Incidence of Wise Infrared Excess Among Solar Analog, Twin, and Sibling Stars

Herschel/PACS photometry of transiting-planet host stars with candidate warm debris disks

Contact Info

Product

Resources

About