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Akademický článek

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Revealing the Physical Conditions around Sgr A* using Bayesian Inference -- I. Observations and Radiative Transfer

Autor: Mark Wardle, M. Royster, Serena Viti, Tomas A. James, Farhad Yusef-Zadeh

Publikováno v: The Astrophysical Journal, 916(2)

We report sub-arcsecond ALMA observations between 272 - 375 GHz towards Sgr A*'s Circumnuclear disk (CND). Our data comprises 8 individual pointings, with significant SiO (8(7) - 7(6)) and SO (7 - 6) emission detected towards 98 positions within thes

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4ffedfedab62f66d2f41104130e1137b
http://arxiv.org/abs/2105.00042

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G0.173-0.42: an X-ray and radio magnetized filament near the galactic center

Autor: Mark Wardle, Craig O. Heinke, F. Yusef-Zadeh, M. Royster, Ian Heywood, Joseph M. Michail, W. D. Cotton, Fernando Camilo, R. G. Arendt

The recent detection of an X-ray filament associated with the radio filament G0.173-0.42 adds to four other nonthermal radio filaments with X-ray counterparts, amongst the more than 100 elongated radio structures that have been identified as synchrot

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::701739dfefdeb1485f58215a22c986cf
http://arxiv.org/abs/2010.09739

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Evidence for a jet and outflow from Sgr A*: a continuum and spectral line study

Autor: Ian Heywood, M. Royster, W. D. Cotton, D. Kunneriath, Joseph M. Michail, Mark Wardle, Farhad Yusef-Zadeh

We study the environment of Sgr A* using spectral and continuum observations with the ALMA and VLA. Our analysis of sub-arcsecond H30alpha, H39alpha, H52alpha and H56alpha line emission towards Sgr A* confirm the recently published broad peak ~500 km

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::20c40dd8333188d843495205e3ebaf8a

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ALMA and VLA observations of emission from the environment of Sgr A*

Autor: D. Kunneriath, M. Royster, W. D. Cotton, Rainer Schödel, D. A. Roberts, Mark Wardle, Farhad Yusef-Zadeh, E. Gallego-Cano, Howard Bushouse

Publikováno v: Digital.CSIC. Repositorio Institucional del CSIC
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NASA Astrophysics Data System

We present 44 and 226 GHz observations of the Galactic Centre within 20 arcsec of Sgr A*. Millimetre continuum emission at 226 GHz is detected from eight stars that have previously been identified at near-IR and radio wavelengths.We also detect a 5.8

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1526cd8aa0286332050c6b6c0d3d64e1
https://doi.org/10.1093/mnras/stx1439

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ALMA Detection of Bipolar Outflows: Evidence for Low Mass Star Formation within 1pc of Sgr A*

Autor: D. A. Roberts, Mark Wardle, M. Royster, D. Kunneriath, A. Wootten, Farhad Yusef-Zadeh

We report the discovery of 11 bipolar outflows within a projected distance of 1pc from Sgr A* based on deep ALMA observations of $^{13}$CO, H30$\alpha$ and SiO (5-4) lines with sub-arcsecond and $\sim1.3$ km/s, resolutions. These unambiguous signatur

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c02eda42eb08974879d58c803e6c2b0a
http://arxiv.org/abs/1711.10573

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Tidal Distortion of the Envelope of an AGB Star IRS 3 near Sgr A*

Autor: Douglas A. Roberts, Farhad Yusef-Zadeh, W. D. Cotton, Rainer Schödel, Mark Wardle, D. Kunneriath, M. Royster

We present radio and mm continuum observations of the Galactic center taken with the VLA and ALMA at 44 and 226 GHz, respectively. We detect radio and mm emission from IRS 3, lying ~4.5" NW of Sgr A*, with a spectrum that is consistent with the photo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ec07d6a73e385c43c1af1b95ddf6c5aa
http://arxiv.org/abs/1702.02196

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ALMA and VLA Observations: Evidence for Ongoing Low-mass Star Formation near Sgr A*

Autor: D. Kunneriath, A. Wootten, M. Royster, Rainer Schödel, Mark Wardle, Bill Cotton, Farhad Yusef-Zadeh, D. A. Roberts

Publikováno v: Digital.CSIC. Repositorio Institucional del CSIC
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Using the Very Large Array (VLA), we recently detected a large number of protoplanetary disc (proplyd) candidates lying within a couple of light years of the massive black hole Sgr A*. The bow-shock appearance of proplyd candidates points towards the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eb9d7bd6241242c2a9d867069c5acf24
http://arxiv.org/abs/1701.05939

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