Zobrazeno 1 - 10
of 989
pro vyhledávání: '"Bonsor, A."'
Autor:
Buchan, Andrew M., Bonsor, Amy, Rogers, Laura K., Brouwers, Marc G., Shorttle, Oliver, Tremblay, Pier-Emmanuel
White dwarf atmospheres are frequently polluted by material from their own planetary systems. Absorption features from Ca, Mg, Fe and other elements can provide unique insights into the provenance of this exoplanetary material, with their relative ab
Externí odkaz:
http://arxiv.org/abs/2406.18486
Autor:
Rogers, L. K., Bonsor, A., Xu, S., Buchan, A. M., Dufour, P., Klein, B. L., Hodgkin, S., Kissler-Patig, M., Melis, C., Walton, C., Weinberger, A.
This second paper presents an in-depth analysis of the composition of the planetary material that has been accreted onto seven white dwarfs with circumstellar dust and gas emission discs with abundances reported in Paper I. The white dwarfs are accre
Externí odkaz:
http://arxiv.org/abs/2406.11470
Autor:
Kao, Malia L., Hawkins, Keith, Rogers, Laura K., Bonsor, Amy, Dunlap, Bart H., Sanders, Jason L., Montgomery, M. H., Winget, D. E.
White dwarfs (WDs) polluted by exoplanetary material provide the unprecedented opportunity to directly observe the interiors of exoplanets. However, spectroscopic surveys are often limited by brightness constraints, and WDs tend to be very faint, mak
Externí odkaz:
http://arxiv.org/abs/2405.17667
Autor:
Casewell, S. L., Debes, J., Dupuy, T. J., Dufour, P., Bonsor, A., Rebassa-Mansergas, A., Murillo-Ojeda, R., French, J. R., Alexander, R. D., Xu, Siyi, Martin, E., Manjavacas, E.
We present new results on PHL 5038AB, a widely separated binary system composed of a white dwarf and a brown dwarf, refining the white and brown dwarf parameters and determining the binary separation to be $66^{+12}_{-24}$~AU. New spectra of the whit
Externí odkaz:
http://arxiv.org/abs/2404.05488
Understanding stellar evolution and its effect on planetary systems is crucial for correctly interpreting the chemical constraints of exo-planetary material that can be given to us by white dwarfs. This article will describe how asteroids, moons, and
Externí odkaz:
http://arxiv.org/abs/2401.08767
Autor:
Rogers, L. K., Bonsor, A., Xu, S., Dufour, P., Klein, B. L., Buchan, A., Hodgkin, S., Hardy, F., Kissler-Patig, M., Melis, C., Weinberger, A. J., Zuckerman, B.
Observations of planetary material polluting the atmospheres of white dwarfs are an important probe of the bulk composition of exoplanetary material. Medium- and high-resolution optical and ultraviolet spectroscopy of seven white dwarfs with known ci
Externí odkaz:
http://arxiv.org/abs/2311.14048
White dwarfs that have accreted planetary materials provide a powerful tool to probe the interiors and formation of exoplanets. In particular, the high Fe/Si ratio of some white dwarf pollutants suggests that they are fragments of bodies that were he
Externí odkaz:
http://arxiv.org/abs/2310.17057
Publikováno v:
Proc. R. Soc. A. (2023) 479-2279
In this work we consider the potential of cometary impacts to deliver complex organic molecules and the prebiotic building blocks required for life to rocky exoplanets. Numerical experiments have demonstrated that for these molecules to survive, impa
Externí odkaz:
http://arxiv.org/abs/2310.12906
Autor:
Rogers, Laura K., Debes, John, Anslow, Richard J., Bonsor, Amy, Casewell, S. L., Santos, Leonardo A. Dos, Dufour, Patrick, Gänsicke, Boris, Fusillo, Nicola Gentile, Koester, Detlev, Nielsen, Louise Dyregaard, Penoyre, Zephyr, Rickman, Emily L., Sahlmann, Johannes, Tremblay, Pier-Emmanuel, Vanderburg, Andrew, Xu, Siyi, Dennihy, Erik, Farihi, Jay, Hermes, J. J., Hodgkin, Simon, Kilic, Mukremin, Kowalski, Piotr M., Sanderson, Hannah, Toonen, Silvia
This work combines spectroscopic and photometric data of the polluted white dwarf WD0141-675 which has a now retracted astrometric super-Jupiter candidate and investigates the most promising ways to confirm Gaia astrometric planetary candidates and o
Externí odkaz:
http://arxiv.org/abs/2310.05778
Autor:
Bonsor, Amy, Wyatt, Mark C., Marino, Sebastian, Davidsson, Björn J. R., Kral, Quentin, Thebault, Philippe
Kuiper-like belts of planetesimals orbiting stars other than the Sun are most commonly detected from the thermal emission of small dust produced in collisions. Emission from gas, most notably CO, highlights the cometary nature of these planetesimals.
Externí odkaz:
http://arxiv.org/abs/2307.01574