publications. articles

Enrichment of the HR 8799 planets by minor bodies and dust

  • We study the possibility that exominor bodies and exodust deliver volatiles and refractories to the exoplanets in the well- characterised system HR 8799.

Astronomy & Astrophysics, In Press, 2020. Read more: Article
arXiv preprint, 2020. Read more: Article

Delivery of organics to Mars through asteroid and comet impacts

  • Organic molecules have been recently detected on Mars.​

  • The lifetime of organics against photodissociation and photodegradation is limited and their presence requires resupply.

  • We perform dynamical simulations of asteroid and comet impact rates on Mars.

  • The amount of carbon delivered by asteroids and comets is comparable to that delivered by IDPs.

  • Organics from asteroids and comets dominate over IDP-borne organics at distances up to 150 km from the crater center.

Icarus, In Press, 2018. Read more: Article
arXiv preprint, 2018. Read more: Article

Center-to-limb variation of the continuum intensity and linear polarization of stars with transiting exoplanets

Kinematics and Physics of Celestial Bodies, vol. 33, issue 4, pp. 166-179. Read more: Article

Simulation of polarimetric effects in planetary system HD 189733

In this paper we present results of linear polarization modelling for HD 189733 in the U filter using the Monte Carlo method.

 

Our simulations are based on the well known effect that linear polarization of a centrosymmetric unresolved star becomes non-zero during the planet transit or in the presence of spots on its surface. HD 189733 is currently the brightest (m_{V}=7.67^{m}) known star to harbour a transiting exoplanet. This fact, along with the short orbital period (2.2 d), makes it very suitable for different types of observations including polarimetry.

 

Since we are interested in occultation effects, a very important parameter is the ratio of the planet to star radii, which is also very large (0.15). As the host star is active and spots may cover up to 1% of the planetary surface, we perform our simulations for different spot parameters such as sizes, locations on the stellar disk, and temperatures.

Publication: Advances in Astronomy and Space Physics, Vol. 2, p. 146-148, 2012
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publications. abstracts

Delivery of water to Mercury through asteroid and comet impacts

American Astronomical Society, DPS meeting #49, 2017
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Delivery of organics to Mars through asteroid and comet impacts

American Astronomical Society, DPS meeting #48, 2016. Read more: Abstract
European Planetary Science Congress 2017. Read more: Abstract

Modeling asteroid dynamics using AMUSE: First test cases

American Astronomical Society, DPS meeting #47, 2015
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Delivery of organic material and water through asteroid impacts

American Astronomical Society, DPS meeting #46, 2014
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Continuum polarization of stars as a result of occupation by transiting exoplanets

Proceedings of the 21th Young Scientists' Conference on Astronomy and Space Physics, 2014
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