Zobrazeno 1 - 10
of 46
pro vyhledávání: '"Purser, S. J. D."'
Autor:
Feeney-Johansson, A., Purser, S. J. D., Ray, T. P., Carrasco-González, C., Rodríguez-Kamenetzky, A., Eislöffel, J., Lim, J., Galván-Madrid, R., Lizano, S., Rodríguez, L. F., Shang, H., Ho, P., Hoare, M.
Publikováno v:
A&A 677, A97 (2023)
Using observations with e-MERLIN and the VLA, together with archival data from ALMA, we obtain high-resolution radio images of two binary YSOs: L1551 IRS 5 and L1551 NE, covering a wide range of frequencies from 5 - 336 GHz, and resolving emission fr
Externí odkaz:
http://arxiv.org/abs/2307.12746
Autor:
Feeney-Johansson, A., Purser, S. J. D., Ray, T. P., Vidotto, A. A., Eislöffel, J., Callingham, J. R., Shimwell, T. W., Vedantham, H. K., Hallinan, G., Tasse, C.
Publikováno v:
A&A 653, A101 (2021)
In recent years, thanks to new facilities such as LOFAR capable of sensitive observations, much work has been done on the detection of stellar radio emission at low frequencies. Such emission has commonly been shown to be coherent emission, generally
Externí odkaz:
http://arxiv.org/abs/2106.15445
In conjunction with a previous southern-hemisphere work, we present the largest radio survey of jets from massive protostars to date with high-resolution, ($\sim 0.04^{\prime\prime}$) VLA observations towards two subsamples of massive star-forming re
Externí odkaz:
http://arxiv.org/abs/2103.08990
We report the results of the Jansky Very Large Array (JVLA) observation of five massive protostars at 6 and 22.2 GHz. The aim of the study was to compare their current fluxes and positions with previous observations to search for evidence of variabil
Externí odkaz:
http://arxiv.org/abs/2012.12822
Autor:
Fedriani, R., Garatti, A. Caratti o, Purser, S. J. D., Sanna, A., Tan, J. C., Garcia-Lopez, R., Ray, T. P., Coffey, D., Stecklum, B., Hoare, M.
Publikováno v:
Nature Communications, 2019, https://www.nature.com/articles/s41467-019-11595-x
It is important to determine if massive stars form via disc accretion, like their low-mass counterparts. Theory and observation indicate that protostellar jets are a natural consequence of accretion discs and are likely to be crucial for removing ang
Externí odkaz:
http://arxiv.org/abs/1908.05346
Publikováno v:
MNRAS, 2019
Massive young stellar objects (MYSOs) have recently been shown to drive jets whose particles can interact with either the magnetic fields of the jet or ambient medium to emit non-thermal radiation. We report a search for non-thermal radio emission fr
Externí odkaz:
http://arxiv.org/abs/1904.04880
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 475, Issue 1, p.2-19, 2018
We present sensitive ($\sigma<10{\rm \mu Jy \, beam^{-1}}$), radio continuum observations using the Australian telescope compact array (ATCA) at frequencies of $6$ and $9$ GHz towards 4 MYSOs. From a previous, less sensitive work, these objects are k
Externí odkaz:
http://arxiv.org/abs/1809.10082
Autor:
Purser, S. J. D., Ainsworth, R. E., Ray, T. P., Green, D. A., Taylor, A. M., Scaife, A. M. M.
DG Tau A, a class-II young stellar object (YSO) displays both thermal, and non-thermal, radio emission associated with its bipolar jet. To investigate the nature of this emission, we present sensitive ($\sigma\sim2\,\mu {\rm Jy \,beam^{-1}}$), Karl G
Externí odkaz:
http://arxiv.org/abs/1809.10065
Autor:
Evans, M. G., Ilee, J. D., Hartquist, T. W., Caselli, P., Szucs, L., Purser, S. J. D., Boley, A. C., Durisen, R. H., Rawlings, J. M. C.
Gravitational instabilities (GIs) are most likely a fundamental process during the early stages of protoplanetary disc formation. Recently, there have been detections of spiral features in young, embedded objects that appear consistent with GI-driven
Externí odkaz:
http://arxiv.org/abs/1706.00254
Autor:
Purser, S. J. D., Lumsden, S. L., Hoare, M. G., Urquhart, J. S., Cunningham, N., Purcell, C. R., Brooks, K. J., Garay, G., Gúzman, A. E., Voronkov, M. A.
Radio continuum observations using the Australia telescope compact array at 5.5, 9.0, 17.0 and 22.8 GHz have detected free-free emission associated with 45 of 49 massive young stellar objects and HII regions. Of these, 26 sources are classified as io
Externí odkaz:
http://arxiv.org/abs/1605.01200