Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Denis A Leahy"'
Publikováno v:
The Astronomical Journal, Vol 167, Iss 5, p 211 (2024)
Our neighboring galaxy M31 has been recently surveyed at the far- and near-ultraviolet (FUV and NUV) with the UVIT telescope on AstroSat, which provides unprecedented sensitivity to young stellar populations. Here the UVIT data are supplemented with
Externí odkaz:
https://doaj.org/article/048b9ce3c38f4356bf78f77ce4bf1990
Publikováno v:
Universe, Vol 8, Iss 12, p 653 (2022)
Supernova remnants (SNRs) are an integral part in studying the properties of the Galaxy and its interstellar medium. For the current work, we compare the observed radio luminosities of SNRs to predictions based on a recent analytic model applied to 5
Externí odkaz:
https://doaj.org/article/bcf0206588764dd596ac2940b2179c39
Autor:
Denis A. Leahy
Publikováno v:
Universe, Vol 8, Iss 5, p 274 (2022)
Models for supernova remnant (SNR) evolution can be used to determine the energy of the explosion, the age of the SNR, and the density of the surrounding medium by matching observations. Observed SNR properties derived from the X-ray spectrum include
Externí odkaz:
https://doaj.org/article/fd8858eec51b4843932300dea0006c56
Autor:
Benne W Holwerda, Frank Bigiel, Albert Bosma, Helene M Courtois, Nathan Deg, Helga Dénes, Ahmed Elagali, Bi-Qing For, Baerbel Koribalski, Denis A Leahy, Karen Lee-Waddell, Ángel R López-Sánchez, Se-Heon Oh, Tristan N Reynolds, Jonghwan Rhee, Kristine Spekkens, Jing Wang, Tobias Westmeier, O Ivy Wong
Publikováno v:
Mon.Not.Roy.Astron.Soc.
Mon.Not.Roy.Astron.Soc., 2023, 521 (1), pp.1502-1517. ⟨10.1093/mnras/stad602⟩
Mon.Not.Roy.Astron.Soc., 2023, 521 (1), pp.1502-1517. ⟨10.1093/mnras/stad602⟩
Galaxy morphology in atomic hydrogen (HI) and in the ultra-violet (UV) are closely linked. This has motivated their combined use to quantify morphology over the full H i disk for both H i and UV imaging. We apply galaxy morphometrics: Concentration,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3863e4b90b9550d4ac6cd5e83d368161
https://doi.org/10.1093/mnras/stad602
https://doi.org/10.1093/mnras/stad602
The high-mass X-ray binary system 4U 0114 + 65 was observed by Nustar in October 2019 and by XMM-Newton in August 2015. Here we performed spectral and timing analysis of the Nustar observation and carry out timing analysis on the XMM-Newton data. We
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2136b8c75b59add769eec80741465285
http://arxiv.org/abs/2304.09295
http://arxiv.org/abs/2304.09295
Autor:
Denis A. Leahy, Mohammed H. Abdallah
Publikováno v:
Journal of High Energy Physics, Gravitation and Cosmology. :896-918
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bb652e6cae788d88330b6f05be232c08
https://doi.org/10.4236/jhepgc.2022.84061
https://doi.org/10.4236/jhepgc.2022.84061
Autor:
Micah Bowles, Hongming Tang, Eleni Vardoulaki, Emma L Alexander, Yan Luo, Lawrence Rudnick, Mike Walmsley, Fiona Porter, Anna M M Scaife, Inigo Val Slijepcevic, Elizabeth A K Adams, Alexander Drabent, Thomas Dugdale, Gülay Gürkan, Andrew M Hopkins, Eric F Jimenez-Andrade, Denis A Leahy, Ray P Norris, Syed Faisal ur Rahman, Xichang Ouyang, Gary Segal, Stanislav S Shabala, O Ivy Wong
We present a novel natural language processing (NLP) approach to deriving plain English descriptors for science cases otherwise restricted by obfuscating technical terminology. We address the limitations of common radio galaxy morphology classificati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9db0bcb82aec6e345630e509e223cf8d
Supernova remnants (SNRs) are an integral part in studying the properties of the Galaxy and its interstellar medium. For the current work, we explore the relation between the observed radio luminosities of SNRs and the physical properties of those SN
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e3816042d3a1db9ff7daabeacb27131d
https://doi.org/10.20944/preprints202211.0010.v1
https://doi.org/10.20944/preprints202211.0010.v1
Autor:
Denis A. Leahy
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 250:310-313
Model calculations are used to study observed variations of column density and X-ray luminosity as a function of orbital phase. The models include a spherically symmetric stellar wind, and the wind plus three types of gas streams. The comparisons of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8e517d33e3e9acae87698f6ca63f24b3
https://doi.org/10.1093/mnras/250.2.310
https://doi.org/10.1093/mnras/250.2.310
Publikováno v:
AIP Conference Proceedings.
A method is presented for including the time‐delays, Doppler effects and oblateness of a rapidly rotating neutron star when fitting X‐ray light curves. Doppler effects and time‐delays are previously known to be essential. We find that the oblat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a100626c6efd040f54250d14cbaf3de2
https://doi.org/10.1063/1.2900293
https://doi.org/10.1063/1.2900293