Zobrazeno 1 - 10
of 76
pro vyhledávání: '"Arunav Kundu"'
Autor:
Kristen C. Dage, Arash Bahramian, Clancy W. James, Arunav Kundu, Katherine L. Rhode, Jay Strader, Enrico Vesperini, Stephen E. Zepf
Publikováno v:
The Astrophysical Journal Letters, Vol 957, Iss 2, p L17 (2023)
We use multiband archival Hubble Space Telescope (HST) observations to measure the photometric and structural parameters of the M81 globular cluster (GC) that hosts the fast radio burst FRB 20200120E. Our best-fitting King model has an effective radi
Externí odkaz:
https://doaj.org/article/3a8ac4c357f94f4096a79e64557f64b7
Autor:
Erica Thygesen, Yifan Sun, Jeff Huang, Kristen C Dage, Stephen E Zepf, Arunav Kundu, Daryl Haggard, Thomas J Maccarone
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 518:3386-3396
Ultraluminous X-ray Sources (ULXs) in globular clusters are low mass X-ray binaries that achieve high X-ray luminosities through a currently uncertain accretion mechanism. Using archival Chandra and Hubble Space Telescope observations, we perform a v
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e9fcee8bd863f02ef30803133ef4bd48
https://doi.org/10.1093/mnras/stac3244
https://doi.org/10.1093/mnras/stac3244
Autor:
Wasundara Ranhari Athukoralalage, Kristen C Dage, Stephen E Zepf, Arash Bahramian, Edward M Cackett, Arunav Kundu, Thomas J Maccarone
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 518:855-859
NGC 4472 is home to five ultraluminous X-ray sources hosted by globular clusters. These sources have been suggested as good black hole candidates in extragalactic globular clusters$-$ a highly sought after population that may provide observational in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::478551a5fc7a16e30245be3324185489
https://doi.org/10.1093/mnras/stac3145
https://doi.org/10.1093/mnras/stac3145
Autor:
Daryl Haggard, Jay Strader, Konstantinos Kovlakas, Stephen E. Zepf, Arash Bahramian, R. Urquhart, Noah Vowell, Erica Thygesen, Thomas J. Maccarone, Arunav Kundu, Kristen C. Dage
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 508:4008-4016
We investigate a sample of seven edge-on spiral galaxies using Chandra observations. Edge-on spiral galaxies allow us to clearly separate source associated with their star-forming regions versus the outer edges of the system; offering a clear advanta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::17c0e9fdb1327e9d0e1095bbada06573
https://doi.org/10.1093/mnras/stab2850
https://doi.org/10.1093/mnras/stab2850
We investigate archival Hubble Space Telescope ACS/SBC F140LP observations of NGC~1399 to search for evidence of multiple stellar populations in extragalactic globular clusters. Enhanced FUV populations are thought to be indicators of He-enhanced sec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b5ead10731ab8c2d6678fc69d4631122
http://arxiv.org/abs/2210.14637
http://arxiv.org/abs/2210.14637
Autor:
Emilia Barbisan, Jeff Huang, Kristen C Dage, Daryl Haggard, Robin Arnason, Arash Bahramian, William I Clarkson, Arunav Kundu, Stephen E Zepf
Globular clusters (GCs) have been at the heart of many longstanding questions in many sub-fields of astronomy and, as such, systematic identification of GCs in external galaxies has immense impacts. In this study, we take advantage of M87's well-stud
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::99848ce291977b0c92e0cb33a286617e
http://arxiv.org/abs/2205.09280
http://arxiv.org/abs/2205.09280
Autor:
Arunav Kundu, Arash Bahramian, Kristen C. Dage, Omid Noroozi, Mark B. Peacock, Thomas J. Maccarone, Stephen E. Zepf
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 485:1694-1707
A number of ultraluminous X-ray sources (ULXs) are physically associated with extragalactic globular clusters (GCs). We undertake a systematic X-ray analysis of eight of the brightest of these sources. We fit the spectra of the GC ULXs to single powe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c1bf9b1ca97ba0076082f5159ebcf297
https://doi.org/10.1093/mnras/stz479
https://doi.org/10.1093/mnras/stz479
Autor:
Daryl Haggard, Jay Strader, Arunav Kundu, Kristen C. Dage, Jimmy A. Irwin, Mark B. Peacock, Thomas J. Maccarone, Sneha Nair, Stephen E. Zepf, Arash Bahramian, Erica Thygesen
We have identified three ultraluminous X-ray sources (ULXs) hosted by globular clusters (GCs) within NGC 1316's stellar system. These discoveries bring the total number of known ULXs in GCs up to 20. We find that the X-ray spectra of the three new so
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4ebc29272ded7508f70ed1be9fd358a3
Autor:
Stephen E. Zepf, Thomas J. Maccarone, Arash Bahramian, Jay Strader, Mark B. Peacock, Erica Thygesen, Kristen C. Dage, Arunav Kundu
We have identified seven ultraluminous X-ray sources (ULXs) which are coincident with globular cluster candidates (GCs) associated with M87. ULXs in the old GC environment represent a new population of ULXs, and ones likely to be black holes. In this
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::af0eeecec265c8de15e4c4f73c03b60d
http://arxiv.org/abs/2007.00671
http://arxiv.org/abs/2007.00671
Autor:
Thomas J. Maccarone, Arunav Kundu, Lennart M. van Haaften, Stephen E. Zepf, Katherine L. Rhode
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 483:3566-3573
We report the discovery of the transient ultraluminous X-ray source (ULX) CXOU J122602.3+125951 (hereafter M86 tULX-1), located 3'52" (19 kpc) northwest of the centre of the giant elliptical galaxy M86 (NGC 4406) in the Virgo Cluster. The spectrum of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::850f52e592fc2da1b099e226b9f2aa00
https://doi.org/10.1093/mnras/sty3221
https://doi.org/10.1093/mnras/sty3221