Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Panayiotis Tzanavaris"'
Autor:
Kristen Garofali, Antara R. Basu-Zych, Benjamin D. Johnson, Panayiotis Tzanavaris, Anne Jaskot, Chris T. Richardson, Bret D. Lehmer, Mihoko Yukita, Edmund Hodges-Kluck, Ann Hornschemeier, Andrew Ptak, Neven Vulic
Publikováno v:
The Astrophysical Journal, Vol 960, Iss 1, p 13 (2023)
We present a methodology for modeling the joint ionizing impact due to a “simple X-ray population” (SXP) and its corresponding simple stellar population (SSP), where “simple” refers to a single age and metallicity population. We construct com
Externí odkaz:
https://doaj.org/article/30a0ef6e0bdd4839a402e81d15efff0a
Autor:
Stephanie M. LaMassa, Tahir Yaqoob, Panayiotis Tzanavaris, Poshak Gandhi, Timothy Heckman, George Lansbury, Aneta Siemiginowska
Publikováno v:
The Astrophysical Journal, Vol 944, Iss 2, p 152 (2023)
3C 223 is a radio-loud, Type 2 quasar at z = 0.1365 with an intriguing X-ray Multi-mirror Mission (XMM)-Newton spectrum that implicated it as a rare, Compton-thick ( N _H ≳ 1.25 × 10 ^24 cm ^−2 ) active galactic nucleus (AGN). We obtained contem
Externí odkaz:
https://doaj.org/article/2116a7cfeadc48c3b1e4fcfa7d42af8e
Autor:
Rafael T. Eufrasio, Ann Hornschemeier, Mihoko Yukita, Andrew Ptak, Andreas Zezas, Andrea Prestwich, Antara Basu-Zych, Bret D. Lehmer, Panayiotis Tzanavaris, Tassos Fragos
We present new Chandra constraints on the X-ray luminosity functions (XLFs) of X-ray binary (XRB) populations, and their scaling relations, for a sample of 38 nearby galaxies (D = 3.4-29 Mpc). Our galaxy sample is drawn primarily from the Spitzer inf
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d1d1913c679c8ed4e47e8a27b26d055d
http://arxiv.org/abs/1905.05197
http://arxiv.org/abs/1905.05197
Autor:
Andrew P. Ferrell, Gregory R. Sivakoff, Bret D. Lehmer, Tassos Fragos, Rafael T. Eufrasio, Panayiotis Tzanavaris, William N. Brandt, Keith Doore, Andrew Ptak, Antara Basu-Zych, David M. Alexander, Mihoko Yukita, Erik B. Monson
Publikováno v:
The Astrophysical Journal Supplement Series. 248:31
We investigate X-ray binary (XRB) luminosity function (XLF) scaling relations for Chandra detected populations of low-mass XRBs (LMXBs) within the footprints of 24 early-type galaxies. Our sample includes Chandra and HST observed galaxies at D < 25 M
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3d3a38769b35a0919b272c92654829cc
https://doi.org/10.3847/1538-4365/ab9175
https://doi.org/10.3847/1538-4365/ab9175
Autor:
Andreas Zezas, Rafael T. Eufrasio, Ann Hornschemeier, A. Basu-Zych, Bret D. Lehmer, Panayiotis Tzanavaris, L. Markwardt, Tassos Fragos, Andy Ptak, Mihoko Yukita
We present a new technique for empirically calibrating how the X-ray luminosity function (XLF) of X-ray binary (XRB) populations evolves following a star-formation event. We first utilize detailed stellar population synthesis modeling of far-UV to fa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fcba4867068c78896f16c5c213fd261e
Autor:
Catherine Zucker, Kelsey E. Johnson, Sarah C. Gallagher, Katherine Alatalo, Panayiotis Tzanavaris, Lisa May Walker
Publikováno v:
Physics and Astronomy Publications
Compact groups provide an environment to study the growth of galaxies amid multiple prolonged interactions. With their dense galaxy concentrations and relatively low velocity dispersions, compact groups mimic the conditions of hierarchical galaxy ass
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5401acd8e5fd1dca4c30789be5115f85
http://arxiv.org/abs/1603.01623
http://arxiv.org/abs/1603.01623
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 378:221-230
Echelle spectrographs currently provide some of the most precise and detailed spectra in astronomy, the interpretation of which sometimes depends on the wavelength calibration accuracy. In some applications, such as constraining cosmological variatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::64b26a8674867a60c2efa5061555a92a
https://doi.org/10.1111/j.1365-2966.2007.11768.x
https://doi.org/10.1111/j.1365-2966.2007.11768.x
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 340:937-948
A new analysis of Keck/HIRES observations of the broad absorption line QSO APM 0827+5255 indicates that a number of intervening C IV absorbers give rise to absorption lines for which the observed optical depths for 1548, 1550 A doublet components are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::20b801ff3dadafd3684eede2e9679ba6
https://doi.org/10.1046/j.1365-8711.2003.06355.x
https://doi.org/10.1046/j.1365-8711.2003.06355.x
Autor:
Tom Theuns, Scott T. Kay, Matteo Viel, Joop Schaye, Panayiotis Tzanavaris, Robert F. Carswell
Publikováno v:
The astrophysical journal
We have performed hydrodynamical simulations to investigate the effects of galactic winds on the high-redshift (z=3) universe. Strong winds suppress the formation of low-mass galaxies significantly, and the metals carried by them produce C IV absorpt
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::825d30c1e9b7a36677832987fdbd3f79
https://doi.org/10.1086/344521
https://doi.org/10.1086/344521
Publikováno v:
Monthly notices of the Royal Astronomical Society
The temperature of the low-density intergalactic medium is set by the balance between adiabatic cooling resulting from the expansion of the universe, and photo-heating by the UV-background. We have analysed the Lyman-alpha forest of eleven high-resol
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dbedd73fbe0f2741724ecc00972e9348
https://doi.org/10.1046/j.1365-8711.2002.05316.x
https://doi.org/10.1046/j.1365-8711.2002.05316.x