Zobrazeno 1 - 10
of 57
pro vyhledávání: '"S. J. Curran"'
Autor:
Renzhi Su, Minfeng Gu, S. J. Curran, Elizabeth K. Mahony, Ningyu Tang, James R. Allison, Di Li, Ming Zhu, J. N. H. S. Aditya, Hyein Yoon, Zheng Zheng, Zhongzu Wu
Publikováno v:
The Astrophysical Journal Letters, Vol 956, Iss 1, p L28 (2023)
In this letter, we report the discovery of a fast neutral hydrogen outflow in SDSS J145239.38+062738.0, a merging radio galaxy containing an optical type I active galactic nucleus (AGN). This discovery was made through observations conducted by the F
Externí odkaz:
https://doaj.org/article/26f88f04b7f742a8b2f1ada4b4f8b535
Autor:
Renzhi Su, Elizabeth K Mahony, Minfeng Gu, Elaine M Sadler, S J Curran, James R Allison, Hyein Yoon, J N H S Aditya, Yogesh Chandola, Yongjun Chen, Vanessa A Moss, Zhongzu Wu, Xi Shao, Xiang Liu, Marcin Glowacki, Matthew T Whiting, Simon Weng
We present new upgraded Giant Metrewave Radio Telescope (uGMRT) HI 21-cm observations of the ultra-luminous infrared galaxy IRAS 10565+2448, previously reported to show blueshifted, broad, and shallow HI absorption indicating an outflow. Our higher s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::259c71d0d26c1f23986027402e6fc62f
Autor:
Richard W. Hunstead, Max Pettini, Elaine M. Sadler, James R. Allison, Sabine Bellstedt, Aaron S. G. Robotham, Sara L. Ellison, Maxim Voronkov, Claudia del P. Lagos, Vanessa A. Moss, Aidan Hotan, Kevin A. Pimbblet, Minh Huynh, Luke J. M. Davies, Matthew Whiting, Anna D. Kapińska, Elizabeth K. Mahony, Simon P. Driver, Baerbel Koribalski, Jeremy Darling, S. J. Curran
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 494:3627-3641
We present early science results from the First Large Absorption Survey in HI (FLASH), a spectroscopically blind survey for 21-cm absorption lines in cold hydrogen HI gas at cosmological distances using the Australian Square Kilometre Array Pathfinde
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6dc12146bc1c3888d5e44e0e1e72b634
https://doi.org/10.1093/mnras/staa949
https://doi.org/10.1093/mnras/staa949
With the aim of using machine learning techniques to obtain photometric redshifts based upon a source's radio spectrum alone, we have extracted the radio sources from the Million Quasars Catalogue. Of these, 44,119 have a spectroscopic redshift, requ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3b5eba720519308491ed085709cde96c
Autor:
S J Curran
Forthcoming astronomical surveys are expected to detect new sources in such large numbers that measuring their spectroscopic redshift measurements will be not be practical. Thus, there is much interest in using machine learning to yield the redshift
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bc328871d0aec2a5f2056d052c53dc88
Autor:
S. J. Curran
Publikováno v:
Assessment & Evaluation in Higher Education. 45:419-430
There is currently much controversy in the student evaluations of teaching, employed by many universities world-wide. The administrators see these as a valuable means to measure a teacher’s...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a82148bd7c05bbdbc605aa4fce106b2e
https://doi.org/10.1080/02602938.2019.1664396
https://doi.org/10.1080/02602938.2019.1664396
Autor:
Matthew Whiting, Elaine M. Sadler, Richard W. Hunstead, R. Athreya, Helen M. Johnston, James R. Allison, S. J. Curran
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 484:1182-1191
We report the results of a survey for HI 21-cm absorption at z < 0.4 in a new sample of radio sources with the Giant Metrewave Radio Telescope. Of the 11 sources for which there are good data, we obtain zero detections, where four are expected upon a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::389e7dfc15daf41a5c9af39eca20e605
https://doi.org/10.1093/mnras/stz038
https://doi.org/10.1093/mnras/stz038
Autor:
S. J. Curran
`Oumuamua, the first detected interstellar visitor to the solar system, exhibits non-gravitational acceleration in its trajectory. Ruling out other means of propulsion, such as the evaporation of material via a cometary tail, it has been argued that
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::62f69733557f10245b3a9175731fd270
http://arxiv.org/abs/2105.09435
http://arxiv.org/abs/2105.09435
The scientific value of the next generation of large continuum surveys would be greatly increased if the redshifts of the newly detected sources could be rapidly and reliably estimated. Given the observational expense of obtaining spectroscopic redsh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9dd086433c7c28a7826d1d2bc61417e3
Autor:
S J Curran
Machine learning techniques, specifically the k-nearest neighbour algorithm applied to optical band colours, have had some success in predicting photometric redshifts of quasi-stellar objects (QSOs): Although the mean of differences between the spect
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e8ad0afce8cd881b7e0571ff1b0e7b9a