Zobrazeno 1 - 10
of 116
pro vyhledávání: '"Vikram V Dwarkadas"'
Autor:
Vikram V. Dwarkadas
Publikováno v:
Galaxies, Vol 11, Iss 3, p 78 (2023)
The structure and evolution of wind-blown bubbles (WBBs) around massive stars has primarily been investigated using an energy-conserving model of wind-blown bubbles. While this model is useful in explaining the general properties of the evolution, se
Externí odkaz:
https://doaj.org/article/fb944531829b43bdbe58c2e23035f59d
Autor:
Vikram V. Dwarkadas
Publikováno v:
Galaxies, Vol 10, Iss 1, p 37 (2022)
Using a code that employs a self-consistent method for computing the effects of photo-ionization on circumstellar gas dynamics, we model the formation of wind-driven nebulae around massive stars. We take into account changes in stellar properties and
Externí odkaz:
https://doaj.org/article/7ec9b7760fdc47ecacd80afc5dec3086
Publikováno v:
Universe, Vol 8, Iss 1, p 18 (2021)
We perform empirical fits to the Chandra and XMM-Newton spectra of three ultraluminous X-ray sources (ULXs) in the edge-on spiral galaxy NGC 891, monitoring the region over a 17-year time window. One of these sources was visible since the early 1990s
Externí odkaz:
https://doaj.org/article/9b93769284d44d67b8b43b10dad8a7c4
Autor:
Vikram V Dwarkadas
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 520:1362-1370
We report on Chandra X-ray observations of ASASSN-18tb/SN 2018fhw, a low luminosity Type Ia supernova that showed a H line in its optical spectrum. No X-ray emission was detected at the location of the SN. Upper limits to the luminosity of up to 3 $\
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f12901d505c007e1bf58bdea12e416df
https://doi.org/10.1093/mnras/stac3384
https://doi.org/10.1093/mnras/stac3384
Autor:
Chris Albert, Vikram V Dwarkadas
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 514:728-743
We probe the environmental properties of X-ray supernova remnants (SNRs) at various points along their evolutionary journey, especially the S-T phase, and their conformance with theoretically derived models of SNR evolution. The remnant size is used
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c2f81e512508bdb4eb3ac3d76e158e3e
https://doi.org/10.1093/mnras/stac1288
https://doi.org/10.1093/mnras/stac1288
Publikováno v:
Universe, Vol 8, Iss 18, p 18 (2022)
Universe; Volume 8; Issue 1; Pages: 18
Universe; Volume 8; Issue 1; Pages: 18
We perform empirical fits to the \emph{Chandra} and \emph{XMM-Newton} spectra of three ultraluminous X-ray sources (ULXs) in the edge-on spiral galaxy NGC 891, monitoring the region over a seventeen year time window. One of these sources has been vis
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6f6a435097e6e3ed55baae2dbc4bb7f9
https://www.mdpi.com/2218-1997/8/1/18
https://www.mdpi.com/2218-1997/8/1/18
Publikováno v:
Astronomische Nachrichten. 341:163-169
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ccab0c2b1630a2f4475c7d78c945aad2
https://doi.org/10.1002/asna.202023773
https://doi.org/10.1002/asna.202023773
Autor:
Michael F Bietenholz, Norbert Bartel, Franz E Bauer, Vikram V Dwarkadas, Leon Mtshweni, Carlos Orquera-Rojas, Simon Ellingsen, Shinji Horiuchi, Anastasios Tzioumis
We present broadband radio flux-density measurements supernova (SN) 1996cr, made with MeerKAT, ATCA and ALMA, and images made from very long baseline interferometry (VLBI) observations with the Australian Long Baseline Array. The spectral energy dist
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e1035e2b23f509b0674b00a3dabc4af4
Autor:
Vikram V. Dwarkadas
Over the past two decades, I have been actively involved in teaching astronomy and astrophysics to Chicago Public School (CPS) students and their teachers, in collaboration with various groups as well as by myself. Valuable resources that we have cre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c3260b394804df247e49ae9a113e68c3
http://arxiv.org/abs/2108.07874
http://arxiv.org/abs/2108.07874
Publikováno v:
PoS
37th International Cosmic Ray Conference
37th International Cosmic Ray Conference, Jul 2021, Berlin, Germany. pp.926, ⟨10.22323/1.395.0926⟩
37th International Cosmic Ray Conference
37th International Cosmic Ray Conference, Jul 2021, Berlin, Germany. pp.926, ⟨10.22323/1.395.0926⟩
International audience; The shock wave resulting from the core-collapse of a massive star can accelerate particles up to PeV energies in the first few days to weeks after the explosion. This can lead to the production of a potentially detectable gamm
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aae04b82fbbb430b6ce3e00562904ff7
https://doi.org/10.22323/1.395.0926
https://doi.org/10.22323/1.395.0926