Results 11 to 20 of about 193 (77)

An Overview of Exocomets

Space Science Reviews
We give a general overview of what the scientific community refers to as “exocomets”. The general definition of exocomets, as presented in this work, is discussed and compared with Solar System comets and interstellar objects, addressing their detection ...
D Iglesias, Isabel Rebollido, Snodgrass Colin   +2 more
exaly   +5 more sources

New exocomets of β Pic

Astronomy and Astrophysics, 2022
Aims. The aim of our work is to analyze the light curves of β Pic which were recently observed by the Transiting Exoplanet Survey Satellite (TESS) in sectors 32, 33, and 34 by searching for the signatures of exocomet transits. Methods. We processed the β
Ya V Pavlenko, I Kulyk, M Vasylenko
exaly   +3 more sources

Exocomets in the circumstellar gas disk of HD 172555 [PDF]

Astronomy and Astrophysics, 2014
The source HD 172555 is a young A7V star surrounded by a debris disk with a gaseous component. Here, we present the detection of variable absorption features detected simultaneously in the Ca II K and H doublet lines (at λ3933 Å and λ3968 Å).
F Kiefer, A Lecavelier Des Étangs, A Vidal-Madjar   +2 more
exaly   +6 more sources

Exocomets, exoasteroids, and exomoons

Comets, asteroids and moons that orbit stars and planets exterior to our solar system are prefixed with exo . While the existence of these objects is certain, our understanding of their physical properties, composition, and diversity is still in its ...
P A Strøm
exaly   +4 more sources

Likely Transiting Exocomets Detected By <i>Kepler</i>. [PDF]

Mon Not R Astron Soc, 2018
17 pages, 13 figures, accepted for publication in MNRAS; modified in response to comments by the ...
Rappaport S, Vanderburg A, Jacobs T, LaCourse D, Jenkins J, Kraus A, Rizzuto A, Latham DW, Bieryla A, Lazarevic M, Schmitt A.   +10 more
europepmc   +6 more sources

Hint of an exocomet transit in the CHEOPS light curve of HD 172555 [PDF]

Astronomy & Astrophysics, 2023
HD 172555 is a young (∼20 Myr) A7V star surrounded by a 10 au wide debris disk suspected to be replenished partly by collisions between large planetesimals. Small evaporating transiting bodies, that is exocomets, have also been detected in this system by
Anglada G., Bonfils X., Reimers C., Pollacco D., Ragazzoni R., Wilson T. G., Munari M., Fortier A., Smith A. M. S., Steller M., Scandariato G., Demory B. -O., Magrin D., Simon A. E., Szabo G. M., Cabrera J., Peter G., Fridlund M., Lecavelier Des Etangs A., Collier Cameron A., Kiss L. L., Piotto G., Csizmadia S., Fossati L., Santos N. C., Sousa S. G., Nascimbeni V., Barros S. C. C., Barrado D., Alibert Y., Isaak K. G., Baumjohann W., Lovis C., Segransan D., Erikson A., Ratti F., Gillon M., Queloz D., Kiefer F., Demangeon O. D. S., Rauer H., Brandeker A., Ehrenreich D., Piazza D., Davies M. B., Charnoz S., Billot N., Walter I., Barczy T., Delrez L., Lendl M., Thomas N., Deleuil M., Broeg C., Gudel M., Beck T., Laskar J., Alonso R., Heng K., Olofsson G., Pagano I., Beck M., Walton N. A., Rando N., Gandolfi D., Udry S., Benz W., Palle E., Van Grootel V., Deline A., Hebrard G., Hoyer S., Maxted P. F. L., Ribas I., Ottensamer R.   +74 more
core   +22 more sources

Exocomets of β Pictoris

Astronomy & Astrophysics
Aims. We investigate the dynamical evolution of particles in the β Pic system to determine likely formation pathways to the exocomet populations observed in the present day. We aim to relate these results to similar studies recently carried out since the
Jaworska K. P., Hoeijmakers H. J.
doaj   +3 more sources

The little dippers : transits of star-grazing exocomets? [PDF]

Monthly Notices of the Royal Astronomical Society, 2018
We describe EPIC 205718330 and EPIC 235240266, two systems identified in the K2 data whose light curves contain episodic drops in brightness with shapes and durations similar to those of the young `dipper' stars, yet shallower by ˜1-2 orders of magnitude.
Ansdell, M., Mann, A.W., Kenworthy, M., Hedges, C., LaCourse, D.M., Vanderburg, A., Kenworthy, M.A., Manara, C.F., Kennedy, G.M., Jacobs, T. L., Frasca, A., Jacobs, T.L., Mann, A., Manara, C. F., Kennedy, Grant M., Hirano, T., LaCourse, D. M., Gaidos, E.   +17 more
core   +5 more sources

Exocomets sighted around distant stars

New Scientist, 2017
Kepler finds planets by measuring the intensity of a star's light over time. When a planet passes in front of its host star, an event called a transit, the light dims slightly. The resulting "light curve"--a graph of brightness over several days--is symmetrical, with the light levels dropping and then rising again at equal rates.
Jesse Emspak
exaly   +3 more sources

SIGNATURES OF EXOCOMET ACTIVITY AROUND STARS AT DIFFERENT EVOLUTIONARY STAGES

Odessa Astronomical Publications, 2020
We discuss the current state of problems associated with the discovery and study of exocomets, i.e objects of extrasolar systems, that are in many aspects similar to the solar system comets.
Y. Kuznyetsova, Ya. Pavlenko, I. Kulyk, O. Zakhozhay, P. Korsun, S. Borysenko, V. Krushevska, O. Shubina, M. Andreev   +8 more
doaj   +4 more sources