Zobrazeno 1 - 10
of 731
pro vyhledávání: '"TRIPATHI, ASHUTOSH"'
Autor:
Tripathi, Ashutosh, Gupta, Alok C., Smith, Krista Lynne, Wiita, Paul J., Aller, Margo F., Volvach, Alexandr E., Lähteenmäki, Anne, Aller, Hugh D., Tornikoski, Merja, Volvach, Larisa N.
Publikováno v:
The Astrophysical Journal, Volume 977, Number 2, 166 (2024)
We examine lengthy radio light curves of the flat spectrum radio galaxy 3C 454.3 for possible quasi-periodic oscillations (QPOs). The data used in this work were collected at five radio frequencies, 4.8, 8.0, 14.5, 22.0, and 37.0 GHz between 1979--20
Externí odkaz:
http://arxiv.org/abs/2412.10771
Federated Learning (FL) marks a transformative approach to distributed model training by combining locally optimized models from various clients into a unified global model. While FL preserves data privacy by eliminating centralized storage, it encou
Externí odkaz:
http://arxiv.org/abs/2412.04416
Despite recent advancements in federated learning (FL) for medical image diagnosis, addressing data heterogeneity among clients remains a significant challenge for practical implementation. A primary hurdle in FL arises from the non-IID nature of dat
Externí odkaz:
http://arxiv.org/abs/2407.05800
Rossby wave instability (RWI) is considered the underlying mechanism to crescent-shaped azimuthal asymmetries, discovered in (sub-)millimeter dust continuum of many protoplanetary disks. Previous works on linear theory were conducted in the hydrodyna
Externí odkaz:
http://arxiv.org/abs/2407.02103
Iron line spectroscopy has been one of the leading methods not only for measuring the spins of accreting black holes but also for testing fundamental physics. Basing on such a method, we present an analysis of a dataset observed simultaneously by NuS
Externí odkaz:
http://arxiv.org/abs/2404.06020
In a previous paper, we reported evidence for quasi-periodicities in the \textsl{TESS} light curves of BL Lacerate and two other blazars found serendipitously in the SDSS AGN catalog. In this work, we find tentative evidence for quasi-periodic featur
Externí odkaz:
http://arxiv.org/abs/2402.04352
We report the time series analysis of TESS light curves of three blazars, BL Lacertae, 1RXS J111741.0+254858, and 1RXS J004519.6+212735, obtained using a customized approach for extracting AGN light curves. We find tentative evidence for quasi-period
Externí odkaz:
http://arxiv.org/abs/2312.14144
The ultra-luminous X-ray source CXO~J133815.6+043255 is a strong candidate for a bona-fide intermediate mass black hole, residing in the outskirts of NGC~5252. We present 22~GHz radio observations of this source obtained serendipitously in an ongoing
Externí odkaz:
http://arxiv.org/abs/2309.00051
Autor:
Yuan, Q., Kushwaha, Pankaj, Gupta, Alok C., Tripathi, Ashutosh, Wiita, Paul J., Zhang, M., Liu, X., Lahteenmaki, Anne, Tornikoski, Merja, Tammi, Joni, Ramakrishnan, Venkatessh, Cui, L., Wang, X., Gu, M. F., Bambi, Cosimo, Volvach, A. E.
We perform correlation and periodicity search analyses on long-term multi-band light curves of the FSRQ 1510-089 observed by the space-based Fermi--Large Area Telescope in gamma-rays, the SMARTS and Steward Observatory telescopes in optical and near-
Externí odkaz:
http://arxiv.org/abs/2306.10248