Zobrazeno 1 - 10
of 125
pro vyhledávání: '"Kazimierz J. Borkowski"'
Publikováno v:
The Astrophysical Journal, Vol 962, Iss 2, p 179 (2024)
We present a deep Chandra observation of the shell supernova remnant (SNR) G32.4+0.1, whose featureless X-ray spectrum has led to its classification as an X-ray synchrotron-dominated SNR. We find a partial shell morphology whose outline is quite circ
Externí odkaz:
https://doaj.org/article/7ee9598cc3524271804b6be9f53362de
Autor:
Benson T. Guest, Kazimierz J. Borkowski, Parviz Ghavamian, Robert Petre, Adrien Picquenot, Stephen P. Reynolds, Ivo R. Seitenzahl, Brian J. Williams
Publikováno v:
The Astrophysical Journal, Vol 946, Iss 1, p 44 (2023)
The nature of Type Ia supernovae remains controversial. The youngest remnants of Ia supernovae hold clues to the explosion and to the immediate surroundings. We present a third epoch of Chandra observations of the ∼600 yr old Type Ia remnant 0519
Externí odkaz:
https://doaj.org/article/cbdb2bd3a230453ea2e6c161eecdbaad
Autor:
Benson T. Guest, William P. Blair, Kazimierz J. Borkowski, Parviz Ghavamian, Sean P. Hendrick, Knox S. Long, Robert Petre, John C. Raymond, Armin Rest, Ravi Sankrit, Ivo R. Seitenzahl, Brian J. Williams
We present results from deep Chandra observations of the young Type Ia supernova remnant (SNR) 0509-68.7, also known as N103B, located in the Large Magellanic cloud (LMC). The remnant displays an asymmetry in brightness, with the western hemisphere a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cb99d444f256ad059a022bae14169c6e
Autor:
Alice Griffeth Stone, Heather T. Johnson, John M. Blondin, Richard A. Watson, Kazimierz J. Borkowski, Carla Fröhlich, Ivo R. Seitenzahl, Stephen P. Reynolds
The youngest Galactic supernova remnant G1.9+0.3, probably the result of a Type Ia supernova, shows surprising anomalies in the distribution of its ejecta in space and velocity. In particular, high-velocity shocked iron is seen in several locations f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c1608ac5133a4a9a905c16210644ab8b
http://arxiv.org/abs/2110.08360
http://arxiv.org/abs/2110.08360
Autor:
Benson T. Guest, Kazimierz J. Borkowski, Parviz Ghavamian, Robert Petre, Stephen P. Reynolds, Ivo R. Seitenzahl, Brian J. Williams
Publikováno v:
The Astronomical Journal. 164:231
We present a third epoch of Chandra observations of the Type Ia Large Magellanic Cloud Supernova remnant 0509-67.5. With these new observations from 2020, the baseline for proper-motion measurements of the expansion has grown to 20 yr (from the earli
Autor:
Brian J. Williams, Parviz Ghavamian, Ivo R. Seitenzahl, Stephen P. Reynolds, Kazimierz J. Borkowski, Robert Petre
Publikováno v:
The Astrophysical Journal. 935:78
We perform an expansion study of the Balmer dominated outer shock of the SNR 0519$-$69.0 in the LMC by using a combination of new HST WFC3 imagery obtained in 2020 and archival ACS images from 2010 and 2011. Thanks to the very long time baseline, our
We report Chandra observations of the highly asymmetric core-collapse supernova remnant G350.1-0.3. We document expansion over 9 years away from the roughly stationary central compact object, with sky-plane velocities up to $5000 d_{4.5}$ km s$^{-1}$
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::209113955301b9033925aa9f5ddb94d4
We present a 142-ks Chandra observation of the enigmatic combination supernova remnant G310.6-1.6 consisting of a bright pulsar-wind nebula driven by an energetic pulsar, surrounded by a highly circular, very faint shell with a featureless, probably
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5339173d83bfa16ae7ca7892efbe0642
http://arxiv.org/abs/1911.05792
http://arxiv.org/abs/1911.05792
Publikováno v:
The Astrophysical Journal. 917:55
Particle acceleration to suprathermal energies in strong astrophysical shock waves is a widespread phenomenon, generally explained by diffusive shock acceleration. Such shocks can also amplify upstream magnetic field considerably beyond simple compre
We report new Chandra observations of one of the few Galactic supernova remnants whose X-ray spectrum is dominated by nonthermal synchrotron radiation, G330.2+1.0. We find that between 2006 and 2017, some parts of the shell have expanded by about 1%,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b1889dc728fdb9bdbcb81bba8096deb1
http://arxiv.org/abs/1811.01998
http://arxiv.org/abs/1811.01998