Zobrazeno 1 - 10
of 297
pro vyhledávání: '"Dufour Patrick"'
We performed a chemical analysis of the asteroid-bearing white dwarf WD 1145+017 using optical and ultraviolet spectroscopic data from 25 epochs between 2015 and 2023. We present an updated gas disk model with improved opacity calculations and temper
Externí odkaz:
http://arxiv.org/abs/2410.10948
Infrared-faint white dwarfs are cool white dwarfs exhibiting significant infrared flux deficits, most often attributed to collision-induced absorption (CIA) from H$_2$-He in mixed hydrogen-helium atmospheres. We present James Webb Space Telescope (JW
Externí odkaz:
http://arxiv.org/abs/2409.16224
Autor:
Garg, Nikhil, Florini, Davide, Dufour, Patrick, Muhr, Eloir, Faye, Mathieu, Bocquet, Marc, Querlioz, Damien, Beilliard, Yann, Drouin, Dominique, Alibart, Fabien, Portal, Jean-Michel
Heterogeneous systems with analog CMOS circuits integrated with nanoscale memristive devices enable efficient deployment of neural networks on neuromorphic hardware. CMOS Neuron with low footprint can emulate slow temporal dynamics by operating with
Externí odkaz:
http://arxiv.org/abs/2406.19667
Autor:
Mouny, Pierre-Antoine, Dawant, Raphaël, Dufour, Patrick, Valdenaire, Matthieu, Ecoffey, Serge, Pioro-Ladrière, Michel, Beillard, Yann, Drouin, Dominique
Cryogenic memristor-based DC sources offer a promising avenue for in situ biasing of quantum dot arrays. In this study, we present experimental results and discuss the scaling potential for such DC sources. We first demonstrate the operation of a com
Externí odkaz:
http://arxiv.org/abs/2404.10694
Autor:
Badenas-Agusti, Mariona, Vanderburg, Andrew, Blouin, Simon, Dufour, Patrick, Viaña, Javier, Seager, Sara, Wang, Sharon X.
We present a catalogue of 62 polluted white dwarfs observed by the 9th Low-Resolution Data Release of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST LRS DR9v1; R$\approx$1,800) and the Early Data Release 3 (EDR3) of the Gaia Mi
Externí odkaz:
http://arxiv.org/abs/2310.19790
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:
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
Autor:
Owens, Dylan, Xu, Siyi, Manjavacas, Elena, Leggett, S. K., Casewell, S. L., Dennihy, Erik, Dufour, Patrick, Klein, Beth L., Yeh, Sherry, Zuckerman, B.
Excess infrared flux from white dwarf stars is likely to arise from a dusty debris disk or a cool companion. In this work, we present near-infrared spectroscopic observations with Keck/MOSFIRE, Gemini/GNIRS, and Gemini/Flamingos-2 of seven white dwar
Externí odkaz:
http://arxiv.org/abs/2303.16330
Autor:
Doyle, Alexandra E., Klein, Beth L., Dufour, Patrick, Melis, Carl, Zuckerman, B., Xu, Siyi, Weinberger, Alycia J., Trierweiler, Isabella L., Monson, Nathaniel N., Jura, Michael A., Young, Edward D.
We present observations and analyses of eight white dwarf stars that have accreted rocky material from their surrounding planetary systems. The spectra of these helium-atmosphere white dwarfs contain detectable optical lines of all four major rock-fo
Externí odkaz:
http://arxiv.org/abs/2303.00063
We present an analysis of all single white dwarf stars known to exhibit spectroscopic signatures of neutral helium line splitting due to the presence of a strong magnetic field. Using state-of-the-art models taking into account the effects of magneti
Externí odkaz:
http://arxiv.org/abs/2301.06605