Zobrazeno 1 - 10
of 11 064
pro vyhledávání: '"Ptak, A"'
Examples of achievable Cantorvals are constructed with reversed Kakeya conditions only on a set of asymptotic density zero which answers in positive the Problem 5.2 from Marchwicki and Miska (2021). Additionally, the Lebesgue measure of the boundarie
Externí odkaz:
http://arxiv.org/abs/2412.08768
Autor:
Lambrides, Erini, Garofali, Kristen, Larson, Rebecca, Ptak, Andrew, Chiaberge, Marco, Long, Arianna S., Hutchison, Taylor A., Norman, Colin, McKinney, Jed, Akins, Hollis B., Berg, Danielle A., Chisholm, John, Civano, Francesca, Cloonan, Aidan P., Endsley, Ryan, Faisst, Andreas L., Gilli, Roberto, Gillman, Steven, Hirschmann, Michaela, Kartaltepe, Jeyhan S., Kocevski, Dale D., Kokorev, Vasily, Pacucci, Fabio, Richardson, Chris T., Stiavelli, Massimo, Whalen, Kelly E.
A multitude of JWST studies reveal a surprising over-abundance of over-massive accreting super-massive blackholes (SMBHs) -- leading to a deepening tension between theory and observation in the first billion years of cosmic time. Across X-ray to infr
Externí odkaz:
http://arxiv.org/abs/2409.13047
Autor:
Moon, Hannah, Wik, Daniel R., Antoniou, V., Eracleous, M., Hornschemeier, Ann E., Lazzarini, Margaret, Lehmer, Bret D., Vulic, Neven, Williams, Benjamin F., Maccarone, T. J., Pottschmidt, K., Ptak, Andrew, Yukita, Mihoko, Zezas, Andreas
Publikováno v:
ApJ 970, 167, 2024
Using hard (E>10 keV) X-ray observations with NuSTAR, we are able to differentiate between accretion states, and thus compact object types, of neutron stars and black holes in X-ray binaries (XRBs) in M31, our nearest Milky Way-type neighbor. Using t
Externí odkaz:
http://arxiv.org/abs/2408.02828
Autor:
Sarkar, Arnab, Grant, Catherine E., Miller, Eric D., Bautz, Mark, Schneider, Benjamin, Foster, Rick F., Schellenberger, Gerrit, Allen, Steven, Kraft, Ralph P., Wilkins, Dan, Falcone, Abe, Ptak, Andrew
Galactic cosmic ray (GCR) particles have a significant impact on the particle-induced background of X-ray observatories, and their flux exhibits substantial temporal variability, potentially influencing background levels. In this study, we present on
Externí odkaz:
http://arxiv.org/abs/2405.06602
For a given unitary operator $U$ on a separable complex Hilbert space $\h$, we describe the set $\mathscr{C}_{c}(U)$ of all conjugations $C$ (antilinear, isometric, and involutive maps) on $\h$ for which $C U C = U$. As this set might be empty, we al
Externí odkaz:
http://arxiv.org/abs/2402.14997
Autor:
Kyritsis, E., Zezas, A., Haberl, F., Weber, P., Basu-Zych, A., Vulic, N., Maitra, C., Hämmerich, S., Wilms, J., Sasaki, M., Hornschemeier, A., Ptak, A., Merloni, A., Comparat, J.
We present a study of X-ray normal galaxies using data from the first all-sky scan of the eROSITA X-ray survey. eRASS1 provides the first unbiased X-ray census of normal galaxies allowing us to study the X-ray emission from XRBs and the hot ISM in th
Externí odkaz:
http://arxiv.org/abs/2402.12367
Autor:
Burešová, Dominika, Pták, Pavel
Publikováno v:
International Journal of Theoretical Physics 62, 190 (2023)
Let us denote by $\mathcal{SOMP}$ the class of all set-representable orthomodular posets and by $\mathcal{PD SOMP}$ those elements of $\mathcal{SOMP}$ in which any pair of points in the underlying set $P$ can be distinguished by a set (i.e., $(P, \ma
Externí odkaz:
http://arxiv.org/abs/2401.13798
Autor:
Burešová, Dominika, Pták, Pavel
Publikováno v:
International Journal of Theoretical Physics 60 (2021), 3919-3926
In this note we contribute to the recently developing study of "almost Boolean" quantum logics (i.e. to the study of orthomodular partially ordered sets that are naturally endowed with a symmetric difference). We call them enriched quantum logics (EQ
Externí odkaz:
http://arxiv.org/abs/2401.13651
Autor:
Reynolds, Christopher S., Kara, Erin A., Mushotzky, Richard F., Ptak, Andrew, Koss, Michael J., Williams, Brian J., Allen, Steven W., Bauer, Franz E., Bautz, Marshall, Bodaghee, Arash, Burdge, Kevin B., Cappelluti, Nico, Cenko, Brad, Chartas, George, Chan, Kai-Wing, Corrales, Lía, Daylan, Tansu, Falcone, Abraham D., Foord, Adi, Grant, Catherine E., Habouzit, Mélanie, Haggard, Daryl, Herrmann, Sven, Hodges-Kluck, Edmund, Kargaltsev, Oleg, King, George W., Kounkel, Marina, Lopez, Laura A., Marchesi, Stefano, McDonald, Michael, Meyer, Eileen, Miller, Eric D., Nynka, Melania, Okajima, Takashi, Pacucci, Fabio, Russell, Helen R., Safi-Harb, Samar, Stassun, Keivan G., Falcão, Anna Trindade, Walker, Stephen A., Wilms, Joern, Yukita, Mihoko, Zhang, William W.
The Advanced X-ray Imaging Satellite (AXIS) is a Probe-class concept that will build on the legacy of the Chandra X-ray Observatory by providing low-background, arcsecond-resolution imaging in the 0.3-10 keV band across a 450 arcminute$^2$ field of v
Externí odkaz:
http://arxiv.org/abs/2311.00780
Publikováno v:
Open Life Sciences, Vol 19, Iss 1, Pp 394-424 (2024)
The heterogeneity of ovarian cancer (OC) has made developing effective treatments difficult. Nowadays, hormone therapy plays a growing role in the treatment of OC; however, hormone modulators have had only limited success so far. To provide a more ri
Externí odkaz:
https://doaj.org/article/7ed7d5174e2a4bfdbb2f23e45f634dc4
