Zobrazeno 1 - 10
of 297
pro vyhledávání: '"Swan Andrew A"'
Autor:
Rogers, Laura K., Manser, Christopher J., Bonsor, Amy, Dennihy, Erik, Hodgkin, Simon, Kissler-Patig, Markus, Lai, Samuel, Melis, Carl, Xu, Siyi, Fusillo, Nicola Gentile, Gänsicke, Boris, Swan, Andrew, Toloza, Odette, Veras, Dimitri
There is increasing evidence for the presence and variability of circumstellar dust and gas around white dwarfs that are polluted with exoplanetary material, although the origin of this dust and gas remains debated. This paper presents the first near
Externí odkaz:
http://arxiv.org/abs/2412.07647
Autor:
Williams, Jamie, Gaensicke, Boris, Swan, Andrew, O'Brien, Mairi, Izquierdo, Paula, Cutolo, Anna-Maria, Cunningham, Tim
Publikováno v:
A&A 691, A352 (2024)
We present the Planetary Enriched White Dwarf Database (PEWDD), a collection of published photospheric abundances of white dwarfs accreting planetary debris alongside additional information relevant to metal-enrichment and the presence of infrared ex
Externí odkaz:
http://arxiv.org/abs/2409.16046
Autor:
Robert, Akshay, Farihi, Jay, Van Eylen, Vincent, Aungwerojwit, Amornrat, Gänsicke, Boris T., Redfield, Seth, Dhillon, Vikram S., Marsh, Thomas R., Swan, Andrew
This paper investigates the frequency of transiting planetary systems around metal-polluted white dwarfs using high-cadence photometry from ULTRACAM and ULTRASPEC on the ground, and space-based observations with TESS. Within a sample of 313 metal-pol
Externí odkaz:
http://arxiv.org/abs/2407.21743
Autor:
Swan, Andrew W
We give a new formulation of Turing reducibility in terms of higher modalities, inspired by an embedding of the Turing degrees in the lattice of subtoposes of the effective topos discovered by Hyland. In this definition, higher modalities play a simi
Externí odkaz:
http://arxiv.org/abs/2406.05818
Autor:
Aungwerojwit, Amornrat, Gaensicke, Boris T., Dhillon, Vikram S., Drake, Andrew, Inight, Keith, Kaye, Thomas G., Marsh, T. R., Mullen, Ed, Pelisoli, Ingrid, Swan, Andrew
Combining archival photometric observations from multiple large-area surveys spanning the past 17 years, we detect long-term variability in the light curves of ZTFJ032833.52-121945.27 (ZTFJ0328-1219), ZTFJ092311.41+423634.16 (ZTFJ0923+4236) and WD114
Externí odkaz:
http://arxiv.org/abs/2404.04422
Autor:
Swan, Andrew W.
We give a categorical formulation of Kraus' "magic trick" for recovering information from truncated types. Rather than type theory, we work in Van den Berg-Moerdijk path categories with a univalent universe, and rather than propositional truncation w
Externí odkaz:
http://arxiv.org/abs/2403.17961
Autor:
Manser, Christopher J., Izquierdo, Paula, Gänsicke, Boris T., Swan, Andrew, Koester, Detlev, Robert, Akshay, Xu, Siyi, Inight, Keith, Amroota, Ben, Fusillo, N. P. Gentile, Koposov, Sergey E., Kim, Bokyoung, Dey, Arjun, Prieto, Carlos Allende, Aguilar, J., Ahlen, S., Blum, R., Brooks, D., Claybaugh, T., Cooper, A. P., Dawson, K., de la Macorra, A., Doel, P., Forero-Romero, J. E., Gaztañaga, E., Gontcho, S. Gontcho A, Honscheid, K., Kisner, T., Kremin, A., Lambert, A., Landriau, M., Guillou, L. Le, Levi, Michael E., Li, T. S., Meisner, A., Miquel, R., Moustakas, J., Nie, J., Palanque-Delabrouille, N., Percival, W. J., Poppett, C., Prada, F., Rezaie, M., Rossi, G., Sanchez, E., Schlafly, E. F., Schlegel, D., Schubnell, M., Seo, H., Silber, J., Tarlé, G., Weaver, B. A., Zhou, Z., Zou, H.
The Early Data Release (EDR) of the Dark Energy Spectroscopic Instrument (DESI) comprises spectroscopy obtained from 2020 December 14 to 2021 June 10. White dwarfs were targeted by DESI both as calibration sources and as science targets and were sele
Externí odkaz:
http://arxiv.org/abs/2402.18641
Autor:
Manser, Christopher J., Gänsicke, Boris T., Izquierdo, Paula, Swan, Andrew, Najita, Joan, Rockosi, C., Carrillo, Andreia, Kim, Bokyoung, Xu, Siyi, Dey, Arjun, Aguilar, J., Ahlen, S., Blum, R., Brooks, D., Claybaugh, T., Dawson, K., de la Macorra, A., Doel, P., Gaztañaga, E., Gontcho, S. Gontcho A, Honscheid, K., Kehoe, R., Kremin, A., Landriau, M., Guillou, L. Le, Levi, Michael E., Li, T. S., Meisner, A., Miquel, R., Nie, J., Rezaie, M., Rossi, G., Sanchez, E., Schubnell, M., Tarlé, G., Weaver, B. A., Zhou, Z., Zou, H.
There is overwhelming evidence that white dwarfs host planetary systems; revealed by the presence, disruption, and accretion of planetary bodies. A lower limit on the frequency of white dwarfs that host planetary material has been estimated to be rou
Externí odkaz:
http://arxiv.org/abs/2402.18644
This letter reports the first JWST spectroscopy of a white dwarf debris disk, giving a preliminary assessment of the salient features, and recommendations for future observations. The polluted and dusty star WD 0145+234 experienced a major collisiona
Externí odkaz:
http://arxiv.org/abs/2310.09355
Autor:
Swan, Andrew, Farihi, Jay, Melis, Carl, Dufour, Patrick, Desch, Steven J., Koester, Detlev, Guo, Jincheng
There is a wealth of evidence to suggest that planetary systems can survive beyond the main sequence. Most commonly, white dwarfs are found to be accreting material from tidally disrupted asteroids, whose bulk compositions are reflected by the metals
Externí odkaz:
http://arxiv.org/abs/2309.06467