Zobrazeno 1 - 10
of 3 981
pro vyhledávání: '"Parker, Michael An"'
Autor:
Boorman, Peter G., Gandhi, Poshak, Buchner, Johannes, Stern, Daniel, Ricci, Claudio, Baloković, Mislav, Asmus, Daniel, Harrison, Fiona A., Svoboda, Jiří, Greenwell, Claire, Koss, Michael, Alexander, David M., Annuar, Adlyka, Bauer, Franz, Brandt, William N., Brightman, Murray, Panessa, Francesca, Chen, Chien-Ting J., Farrah, Duncan, Forster, Karl, Grefenstette, Brian, Hönig, Sebastian F., Hill, Adam B., Kammoun, Elias, Lansbury, George, Lanz, Lauranne, LaMassa, Stephanie, Madsen, Kristin, Marchesi, Stefano, Middleton, Matthew, Mingo, Beatriz, Parker, Michael L., Treister, Ezequiel, Ueda, Yoshihiro, Urry, C. Megan, Zappacosta, Luca
Hard X-ray-selected samples of Active Galactic Nuclei (AGN) provide one of the cleanest views of supermassive black hole accretion, but are biased against objects obscured by Compton-thick gas column densities of $N_{\rm H}$ $>$ 10$^{24}$ cm$^{-2}$.
Externí odkaz:
http://arxiv.org/abs/2410.07339
Publikováno v:
Int J Artif Intell Educ (2024)
This paper assesses the potential for the large language models (LLMs) GPT-4 and GPT-3.5 to aid in deriving insight from education feedback surveys. Exploration of LLM use cases in education has focused on teaching and learning, with less exploration
Externí odkaz:
http://arxiv.org/abs/2309.17447
Autor:
Härer, Lucia K., Parker, Michael L., Mellah, Ileyk El, Grinberg, Victoria, Ballhausen, Ralf, Igo, Zsofi, Joyce, Amy, Wilms, Jörn
Publikováno v:
A&A 680, A72 (2023)
Stellar winds of massive stars are known to be driven by line absorption of UV photons, a mechanism which is prone to instabilities, causing the wind to be clumpy. The clumpy structure hampers wind mass-loss estimates, limiting our understanding of m
Externí odkaz:
http://arxiv.org/abs/2304.14201
Autor:
Kara, Erin, Barth, Aaron J., Cackett, Edward M., Gelbord, Jonathan, Montano, John, Li, Yan-Rong, Santana, Lisabeth, Horne, Keith, Alston, William N., Buisson, Douglas, Chelouche, Doron, Du, Pu, Fabian, Andrew C., Fian, Carina, Gallo, Luigi, Goad, Michael R., Grupe, Dirk, Buitrago, Diego H. Gonzalez, Santisteban, Juan V. Hernandez, Kaspi, Shai, Hu, Chen, Komossa, S., Kriss, Gerard A., Lewin, Collin, Lewis, Tiffany, Loewenstein, Michael, Lohfink, Anne, Masterson, Megan, McHardy, Ian M., Mehdipour, Missagh, Miller, Jake, Panagiotou, Christos, Parker, Michael L., Pinto, Ciro, Remillard, Ron, Reynolds, Christopher, Rogantini, Daniele, Wang, Jian-Min, Wang, Jingyi, Wilkins, Dan
We present the first results from a 100-day Swift, NICER and ground-based X-ray/UV/optical reverberation mapping campaign of the Narrow-Line Seyfert 1 Mrk 335, when it was in an unprecedented low X-ray flux state. Despite dramatic suppression of the
Externí odkaz:
http://arxiv.org/abs/2302.07342
Autor:
Kollatschny, Wolfram, Grupe, Dirk, Parker, Michael L., Ochmann, Martin W., Schartel, Norbert, Romero-Colmenero, Encarni, Winkler, Hartmut, Komossa, Stefanie, Famula, Philipp, Probst, Malte A., Santos-Lleo, Maria
Publikováno v:
A&A 670, A103 (2023)
IRAS23226-3843 has previously been classified as a changing-look AGN based on X-ray and optical spectral variations. In 2019, Swift observations revealed a strong rebrightening in X-ray and UV fluxes in comparison to observations in 2017. We took fol
Externí odkaz:
http://arxiv.org/abs/2212.07270
Autor:
Sisk-Reynés, Júlia, Reynolds, Christopher S., Parker, Michael L., Matthews, James H., Marsh, M. C. David
Axion-Like Particles (ALPs) are well-motivated extensions of the Standard Model of Particle Physics and a generic prediction of some string theories. X-ray observations of bright Active Galactic Nuclei (AGN) hosted by rich clusters of galaxies are ex
Externí odkaz:
http://arxiv.org/abs/2211.05136
We present a spectral analysis of two XMM-Newton observations of the narrow-line Seyfert 1 galaxy UGC 11763. UGC 11763 shows very different soft X-ray spectral shapes in the two observations separated by 12 years. Three spectral models are considered
Externí odkaz:
http://arxiv.org/abs/2208.12177
Autor:
Connors, Riley M. T., Garcia, Javier A., Tomsick, John, Mastroserio, Guglielmo, Grinberg, Victoria, Steiner, James F., Jiang, Jiachen, Fabian, Andrew C., Parker, Michael L., Harrison, Fiona, Hare, Jeremy, Mallick, Labani, Lazar, Hadar
The degree to which the thin accretion disks of black hole X-ray binaries are truncated during hard spectral states remains a contentious open question in black hole astrophysics. During its singular observed outburst in $2009\mbox{--}2010$, the blac
Externí odkaz:
http://arxiv.org/abs/2207.06567
Autor:
Jiang, Jiachen, Gallo, Luigi C., Fabian, Andrew C., Parker, Michael L., Reynolds, Christopher S.
We present a detailed analysis of the XMM-Newton observations of five narrow-line Seyfert 1 galaxies (NLS1s). They all show very soft continuum emission in the X-ray band with a photon index of $\Gamma\gtrsim 2.5$. Therefore, they are referred to as
Externí odkaz:
http://arxiv.org/abs/2205.08236
Autor:
Jiang, Jiachen, Buisson, Douglas J. K., Dauser, Thomas, Fabian, Andrew C., Fürst, Felix, Gallo, Luigi C., Harrison, Fiona A., Parker, Michael L., Steiner, James F., Tomsick, John A., Ubach, Santiago, Walton, Dominic J.
We present an analysis of the NuSTAR and Swift spectra of the black hole candidate MAXI J1813-095 in a failed-transition outburst in 2018. The NuSTAR observations show evidence of reflected emission from the inner region of the accretion disc. By mod
Externí odkaz:
http://arxiv.org/abs/2205.08227