Thesis

C. Avdellidou. Hypervelocity impacts in the Solar System: An experimental investigation on the fate of the impactor.", (2016) PhD Thesis, University of Kent

Published Articles in peer-review journals

[16] C. Avdellidou, E. Munaibari, R. Larson, J. Vaubaillon, M. Delbo, P. Hayne, M. Wieczorek, D. Sheward, A. Cook. Impacts on the Moon: analysis methods and size distribution of impactors.  Planetary & Space Science 200, article id. 105201 (2021).

[15] D. DellaGiustina, H. Kapplan, A. Simons, W. Bottke, C. Avdellidou, et al. Exogenic basalt on Asteroid (101955) Bennu, Nature Astronomy 5, 31-38 (2021).

[14] D. N. DellaGiustina, K.N. Burke, K.J. Walsh, D. R. Golish et al. (incl. C. Avdellidou). Variations in Color and Reflectance on the Surface of Asteroid (101955) Bennu, Science 370, 6517 (2020).

[13] R. L. Ballouz, K. J. Walsh, O. S. Barnouin, D. N. DellaGiustina, et al. (incl. C. Avdellidou). Bennu's near-Earth lifetime of 1.75 million years inferred from craters on its boulders, Nature 587, 205-209 (2020).

[12] J. D.Tandy, M.C.Price, P. Wozniakiewicz, M. J. Cole, L. S. Alesbrook, C. Avdellidou. Impact Flash Evolution of CO2 Ice, Water Ice and Frozen Martian and Lunar Regolith-Simulant Targets, Meteoritics and Planetary Science 55, 10, 2301-2319 (2020).

[11] C. Avdellidou, A. DiDonna, C. Schultz, B. Harthong, M. C. Price, R. Peyroux, D. Britt, M. Cole, & M. Delbo'. Mechanical properties of very weak carbonaceous asteroid analogues I: response to hypervelocity impacts, Icarus 341, article id. 113648 (2020).

[10] A. Fienga, C. Avdellidou, J. Hanus. Asteroid masses obtained with INPOP planetary ephemerides, MNRAS 492, Issue 1, p.589-602 (2020).

[9] C. Avdellidou & J. Vaubaillon. Temperatures of lunar impact flashes: mass and size distribution of small impactors hitting the Moon, MNRAS 484, Issue 4, p.5212-5222 (2019).

[8] M. Delbo', C. Avdellidou, A. Morbidelli. An ancient and a primordial collisional family as the main sources of X-type asteroids of the inner Main Belt, A&A 624, id.A69, 21 pp. (2019).

[7] A. Bonanos, C. Avdellidou, A. Liakos, M. Xilouris, D. Koschny et al. NELIOTA project: First Temperature Measurement of Lunar Impact Flashes, A&A 612, id.A76, 6 pp. (2018).

[6] C. Avdellidou, M. Delbo', A. Fienga. Exogenous origin of hydration on asteroid (16) Psyche, MNRAS 475, Issue 3, p.3419-3428 (2018).

[5] M. Delbo', K.J. Walsh, B.Bolin, C. Avdellidou, A. Morbidelli. Identication of a primordial asteroid family constrains the original planetesimal population, Science 357, Issue 6355, pp.1026-1029 (2017).

[4] C. Avdellidou, M.C. Price, M. Delbo', M.J. Cole. Survival of the impactor during hypervelocity collisions - II. An analogue for high-porosity targets, MNRAS, Vol. 464, Issue 1, p.734-738 (2017).

[3] C. Avdellidou, M.C. Price, M. Delbo', P. Ioannidis, M.J. Cole. Survival of the impactor during hypervelocity collisions - I. An analogue for low porosity targets,  MNRAS 456, Issue 3, p.2957-2965 (2016).

[2] P. Ioannidis, J.H.M.M. Schmitt, C. Avdellidou, C. von Essen, E. Agol. Kepler-210: An active star with at least two planets, A&A 564, id.A33, 8 pp. (2014).

[1] C. Avdellidou, P. Ioannidis, D.K. Skoulidou, K. Tsiganis, J.H. Seiradakis. Lightcurve Analysis of 266 Aline, 664 Judith, (16959) 1998 QE17 and (32910) 1994 TE15, Minor Planet Bulletin 39, No. 3, p. 103-104 (2012).

COURSES 

Universite Côte d'Azur

2019 Impact Physics and Space applications, Responsible, Masters course (MAUCA) 

University of Kent

2013-2016 PH617-Physics Lab, Demonstrator, undergraduate course 

2013-2014 PH302-Computing Skills, Demonstrator, undergraduate course 

2013          PH020-Algebra and Arithmetics Workshop, Demonstrator, Foundation Year 

Aristotle University of Thessaloniki

2011 Teaching Assistant of the Greek team, International Astronomy & Astrophysics Olympiad (IOAA), Poland 

2010 Teaching Assistant of the Greek team, International Astronomy & Astrophysics Olympiad (IOAA), China 

2009 Teaching Assistant Introduction to Astronomy, 3rd Year 

High School

2009 Astronomy and General Physics, Teaching Assistant during practice placement 

 

STUDENT ADVISORY

2020 Edhah Munaibari (Master-Universite Côte d'Azur) 

Master Thesis: Observations and analysis of lunar impact flashes

Project: During this master thesis the student derived the size distribution of small meteoroids of the near Earth space. He analysed archived ground-based lunar observations. He identied the selenographic coordinates of the impacts and develop an algorithm to link each impactor to a meteoroid stream. He derived from the conrmed potential impact events the masses and sizes of the small impactors (cm-sized). During his thesis we detected the rst lunar impact ash from France and LRO is searching for the new crater. The student is writting a scientic publication and is accepted for a PhD position at the same University. 

2019 Edhah Munaibari (Master-Universite Côte d'Azur) 

Internship at OCA: Real-time impact lunar ash detection.

Project: The student developed an algorithm to detect in real time impact flashes in observational data. The goal of this super-fast detection is to inform LRO/Diviner instrument to detect the thermal tail of the impact event. This is a unique project.

2019 Raven Larson (Master-University of Colorado Boulder) 

Internship at OCA: Extraction of lunar coordinates of lunar impact ashes & detection of events with LRO/DIVINER.

Project: The student developed an algorithm to identify the lunar impact ash coordinates. The accurate coordinates are crucial for the subsequent discovery of the small fresh craters on the lunar surface. The student discovered that the majority of the coordinates of the archival data are inaccurate and several are incorrect. Furthermore, the best impact coordinates are manadtory to perform the link of the impactor to a meteoroid stream and infer the correct impact speed.

 

2019 Daniel Sheward (PhD-Aberystwyth University) 

2018 Daniel Sheward (Master-Aberystwyth University) 

Internship at OCA: Discovery of fresh, small, lunar crater using LRO/NAC data.

Internship at ESTEC/ESA: Corroborating lunar impact ash locations with evidence for impacts in visible and infrared observations from Lunar Reconnaissance Orbiter.

Project for both internships: 12 years after the man-made impact of the SMART-1 lunar satellite on the lunar surface and the study of the resulted crater, we are in a position to have detected hundreds of these events produced by small near-Earth objects (origin from asteroids and comets) hitting the Moon. The ESA-funded project NELIOTA has detected tens of new impact events on the lunar surface. These detections were possible by operating a telescopic monitoring survey of the ashes that are generated during an impact event. We have developed methods to estimate the size of the impacting body and, with the help of scaling laws, the size of the formed crater. In that way we will have an excellent dataset of impact events, knowing several parameters, enabling us to study the impact physics and the impacting population. Since 2009 NASA's Lunar Reconnaissance Orbiter has acquired high resolution visible images and thermal infrared measurements of the lunar surface and these will be the input of the study. This project is to develop an implement a methodology using LRO data to search the lunar surface around the locations of each impact to detect the craters formed, such that their sizes can be measured. After both internships the student was enrolled for a PhD at the Aberystwyth University.

2017 Chrysovalantis Sarakis (Undergraduate-Aristotle University of Thessaloniki) 

Internship at ESTEC/ESA: Shapes and Sizes of asteroids.

Project: During the two months of the project, in collaboration with the Leiden Observatory, the student had to learn the principles and implement telescopic data reduction and photometry. The software he used was provided in advance by myself. Another task was the student to develop a code to identify moving targets in the sky eld and collect the output of photometry. This can be applied to asteroid and comets observations. Data for this project were acquired by myself from the Observatoire Haute Provence (OHP), France and the ESA funded Schmidt Telescope, Calar Alto Observatory, Spain. The later observations were done remotely and during one run the student was present in order to understand the observing procedures. The scientic objective was to extract asteroids lightcurves (ux vs. time). Long-term observations will lead to the construction of the asteroids shape and the determination of the spin-pole alignment. There are international collaborators from the Charles University in Prague who will help on that. A second objective for the student was to work on occultation data, which were obtained and given by Detlef Koschny (ESTEC/ESA), using the Kryoneri telescope, Greece. Occultation is the event where an asteroid passes exactly in front of a background star and makes its light to disappear or dim. Several simultaneous observations from observers at dierent locations on the occultation path will help to determine the asteroids diameter. This LEAPS summer project was part of the students undergraduate thesis in order to obtain his Physics degree. The student was selected for the Masters degree in Physics at the Aristotle University of Thessaloniki (GR).

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