Tom Polakis
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View article: Photometry of the Didymos System across the DART Impact Apparition
Photometry of the Didymos System across the DART Impact Apparition Open
On 2022 September 26, the Double Asteroid Redirection Test (DART) spacecraft impacted Dimorphos, the satellite of binary near-Earth asteroid (65803) Didymos. This demonstrated the efficacy of a kinetic impactor for planetary defense by cha…
View article: Ejecta Evolution Following a Planned Impact into an Asteroid: The First Five Weeks
Ejecta Evolution Following a Planned Impact into an Asteroid: The First Five Weeks Open
The impact of the Double Asteroid Redirection Test spacecraft into Dimorphos, moon of the asteroid Didymos, changed Dimorphos’s orbit substantially, largely from the ejection of material. We present results from 12 Earth-based facilities i…
View article: Photometry of the Didymos system across the DART impact apparition
Photometry of the Didymos system across the DART impact apparition Open
On 26 September 2022, the Double Asteroid Redirection Test (DART) spacecraft impacted Dimorphos, the satellite of binary near-Earth asteroid (65803) Didymos. This demonstrated the efficacy of a kinetic impactor for planetary defense by cha…
View article: Ejecta Evolution Following a Planned Impact into an Asteroid: The First Five Weeks
Ejecta Evolution Following a Planned Impact into an Asteroid: The First Five Weeks Open
The impact of the DART spacecraft into Dimorphos, moon of the asteroid Didymos, changed Dimorphos' orbit substantially, largely from the ejection of material. We present results from twelve Earth-based facilities involved in a world-wide c…
View article: Spins and shapes of basaltic asteroids and the missing mantle problem
Spins and shapes of basaltic asteroids and the missing mantle problem Open
Basaltic V-type asteroids are common in the inner part of the Main Asteroid Belt and much less abundant in the mid and outer parts. They are of scientific interest because they sample crusts and mantles of theoretically plentiful different…
View article: Spins and shapes of V-type asteroids outside the dynamical Vesta family
Spins and shapes of V-type asteroids outside the dynamical Vesta family Open
<p>Vast majority of known V-type asteroids belong to the dynamical Vesta family. A small number of V-types in the mid and outer parts of the Main Asteroid Belt is considered unrelated to the fossil planetesimal (4) Vesta. These objec…
View article: The Aligned Orbit of WASP-148b, the Only Known Hot Jupiter with a nearby Warm Jupiter Companion, from NEID and HIRES
The Aligned Orbit of WASP-148b, the Only Known Hot Jupiter with a nearby Warm Jupiter Companion, from NEID and HIRES Open
We present spectroscopic measurements of the Rossiter–McLaughlin effect for WASP-148b, the only known hot Jupiter with a nearby warm-Jupiter companion, from the WIYN/NEID and Keck/HIRES instruments. This is one of the first scientific resu…
View article: SOLES II: The Aligned Orbit of WASP-148b, the Only Known Hot Jupiter with a Nearby Warm Jupiter Companion, from NEID and HIRES
SOLES II: The Aligned Orbit of WASP-148b, the Only Known Hot Jupiter with a Nearby Warm Jupiter Companion, from NEID and HIRES Open
We present spectroscopic measurements of the Rossiter-McLaughlin effect for WASP-148b, the only known hot Jupiter with a nearby warm-Jupiter companion, from the WIYN/NEID and Keck/HIRES instruments. This is one of the first scientific resu…
View article: Shape models and dynamical properties of basaltic asteroids outside the dynamical Vesta family
Shape models and dynamical properties of basaltic asteroids outside the dynamical Vesta family Open
Through numerical modeling, Nesvorny et al. (2008) showed that asteroids can migrate due to Yarkovsky drift and resonances to outside of the boundaries of the Vesta family. In particular, they found that objects which end up in the scatter…
View article: Investigating the multiwavelength behaviour of the flat spectrum radio quasar CTA 102 during 2013–2017
Investigating the multiwavelength behaviour of the flat spectrum radio quasar CTA 102 during 2013–2017 Open
We present a multiwavelength study of the flat-spectrum radio quasar CTA 102 during 2013–2017. We use radio-to-optical data obtained by the Whole Earth Blazar Telescope, 15 GHz data from the Owens Valley Radio Observatory, 91 and 103 GHz d…
View article: Photometric survey, modelling, and scaling of long-period and low-amplitude asteroids
Photometric survey, modelling, and scaling of long-period and low-amplitude asteroids Open
\n Context. The available set of spin and shape modelled asteroids is strongly biased against slowly rotating targets and those with low lightcurve amplitudes. This is due to the observing selection effects. As a consequence, the current p…