Outputs (12328)

Discovery of persistent quasi-periodic oscillations in accreting white dwarfs: a new link to X-ray binaries (2024)
Journal Article
Veresvarska, M., Scaringi, S., Knigge, C., Paice, J., Buckley, D. A. H., Segura, N. C., de Martino, D., Groot, P. J., Ingram, A., Irving, Z. A., & Szkody, P. (2024). Discovery of persistent quasi-periodic oscillations in accreting white dwarfs: a new link to X-ray binaries. Monthly Notices of the Royal Astronomical Society, 534(4), 3087-3103. https://doi.org/10.1093/mnras/stae2279

Almost all accreting black hole and neutron star (NS) X-ray binary systems (XRBs) exhibit prominent brightness variations on a few characteristic time-scales and their harmonics. These quasi-periodic oscillations (QPOs) are thought to be associated w... Read More about Discovery of persistent quasi-periodic oscillations in accreting white dwarfs: a new link to X-ray binaries.

Systematic collapse of the accretion disc across the supermassive black hole population (2024)
Journal Article
Hagen, S., Done, C., Silverman, J. D., Li, J., Liu, T., Ren, W., Buchner, J., Merloni, A., Nagao, T., & Salvato, M. (2024). Systematic collapse of the accretion disc across the supermassive black hole population. Monthly Notices of the Royal Astronomical Society, 534(3), 2803-2818. https://doi.org/10.1093/mnras/stae2272

The structure of the accretion flow on to supermassive black holes is not well understood. Standard disc models match to zeroth-order in predicting substantial energy dissipation within optically thick material producing a characteristic strong blue/... Read More about Systematic collapse of the accretion disc across the supermassive black hole population.

Tip tilt and focus estimation based on LGS and downlink joint measurements for ground to GEO satellite optical communication link (2024)
Journal Article
Lognoné, P., Rekaya, G., Montmerle-Bonnefois, A., Paillier, L., & Conan, J.-M. (2024). Tip tilt and focus estimation based on LGS and downlink joint measurements for ground to GEO satellite optical communication link. Optics Express, 32(21), 37739-37757. https://doi.org/10.1364/oe.538333

Achieving high data rates in GEO Feeder optical uplinks faces challenges due to the fading nature of the channel induced by atmospheric turbulence. Adaptive optics pre-compensation using downlink measurements is a solution to mitigate the impact of t... Read More about Tip tilt and focus estimation based on LGS and downlink joint measurements for ground to GEO satellite optical communication link.

Prospects for γ-ray observations of the Perseus galaxy cluster with the Cherenkov Telescope Array (2024)
Journal Article
Abe, K., Abe, S., Acero, F., Acharyya, A., Adam, R., Aguasca-Cabot, A., Agudo, I., Aguirre-Santaella, A., Alfaro, J., Alfaro, R., Alvarez-Crespo, N., Alves Batista, R., Amans, J.-P., Amato, E., Angüner, E., Antonelli, L., Aramo, C., Araya, M., Arcaro, C., Arrabito, L., …De la Torre Luque, P. (2024). Prospects for γ-ray observations of the Perseus galaxy cluster with the Cherenkov Telescope Array. Journal of Cosmology and Astroparticle Physics, 2024(10), Article 004. https://doi.org/10.1088/1475-7516/2024/10/004

The PAU survey: photometric redshift estimation in deep wide fields (2024)
Journal Article
Navarro-Gironés, D., Gaztañaga, E., Crocce, M., Wittje, A., Hildebrandt, H., Wright, A. H., Siudek, M., Eriksen, M., Serrano, S., Renard, P., Gonzalez, E. J., Baugh, C. M., Cabayol, L., Carretero, J., Casas, R., Castander, F. J., Daza-Perilla, I. V., De Vicente, J., Fernandez, E., García-Bellido, J., …Tallada-Crespí, P. (2024). The PAU survey: photometric redshift estimation in deep wide fields. Monthly Notices of the Royal Astronomical Society, 534(2), 1504-1527. https://doi.org/10.1093/mnras/stae1686

An Eddington-limited Accretion Disk Wind in the Narrow-line Seyfert 1 PG 1448+273 (2024)
Journal Article
Reeves, J. N., Braito, V., Luminari, A., Porquet, D., Laurenti, M., Matzeu, G., Lobban, A., & Hagen, S. (2024). An Eddington-limited Accretion Disk Wind in the Narrow-line Seyfert 1 PG 1448+273. The Astrophysical Journal, 974(1), Article 58. https://doi.org/10.3847/1538-4357/ad6b95

PG 1448+273 is a luminous, nearby (z = 0.0645), narrow-line Seyfert 1 galaxy, which likely accretes close to the Eddington limit. Previous X-ray observations of PG 1448+273 with XMM-Newton in 2017 and NuSTAR in 2022 revealed the presence of an ultraf... Read More about An Eddington-limited Accretion Disk Wind in the Narrow-line Seyfert 1 PG 1448+273.

Significant impact of Galactic dark matter particles on annihilation signals from Sagittarius analogues (2024)
Journal Article
Vienneau, E., Evans, A. J., Hartl, O. V., Bozorgnia, N., Strigari, L. E., Riley, A. H., & Shipp, N. (2024). Significant impact of Galactic dark matter particles on annihilation signals from Sagittarius analogues. Journal of Cosmology and Astroparticle Physics, 2024(10), Article 019. https://doi.org/10.1088/1475-7516/2024/10/019

We examine the gamma-ray signal from dark matter (DM) annihilation from analogues of the Sagittarius (Sgr) dwarf spheroidal galaxy in the Auriga cosmological simulations. For velocity-dependent annihilation cross sections, we compute emissions from s... Read More about Significant impact of Galactic dark matter particles on annihilation signals from Sagittarius analogues.

Experimental demonstration of improved quantum optimization with linear Ising penalties (2024)
Journal Article
Mirkarimi, P., Hoyle, D. C., Williams, R., & Chancellor, N. (2024). Experimental demonstration of improved quantum optimization with linear Ising penalties. New Journal of Physics, 26(10), Article 103005. https://doi.org/10.1088/1367-2630/ad7e4a

The standard approach to encoding constraints in quantum optimization is the quadratic penalty method. Quadratic penalties introduce additional couplings and energy scales, which can be detrimental to the performance of a quantum optimizer. In quantu... Read More about Experimental demonstration of improved quantum optimization with linear Ising penalties.

Braving the Storm: Quantifying Disk-wide Ionized Outflows in the Large Magellanic Cloud with ULLYSES (2024)
Journal Article
Zheng, Y., Tchernyshyov, K., Olsen, K., Choi, Y., Bustard, C., Roman-Duval, J., Zhu, R., Di Teodoro, E. M., Werk, J., Putman, M., McLeod, A. F., Faerman, Y., Simons, R. C., & Peek, J. (2024). Braving the Storm: Quantifying Disk-wide Ionized Outflows in the Large Magellanic Cloud with ULLYSES. The Astrophysical Journal, 974(1), 22. https://doi.org/10.3847/1538-4357/ad64d2

The Large Magellanic Cloud (LMC) is home to many H ii regions, which may lead to significant outflows. We examine the LMC’s multiphase gas (T∼104-5 K) in H i, S ii, Si iv, and C iv using 110 stellar sight lines from the Hubble Space Telescope’s Ultra... Read More about Braving the Storm: Quantifying Disk-wide Ionized Outflows in the Large Magellanic Cloud with ULLYSES.

Pseudo-proper two-dimensional electron gas formation (2024)
Journal Article
Bennett, D., Aguado-Puente, P., Artacho, E., & Bristowe, N. C. (2024). Pseudo-proper two-dimensional electron gas formation. New Journal of Physics, 26(10), Article 102001. https://doi.org/10.1088/1367-2630/ad8180

In spite of the interest in the two-dimensional electron gases (2DEGs) experimentally found at surfaces and interfaces, important uncertainties remain about the observed insulator–metal transitions (IMTs). Here we show how an explicit pseudo-proper c... Read More about Pseudo-proper two-dimensional electron gas formation.