G
G. Bekiaris
Researcher at Australia Telescope National Facility
Publications - 4
Citations - 223
G. Bekiaris is an academic researcher from Australia Telescope National Facility. The author has contributed to research in topics: Galaxy & Galaxy rotation curve. The author has an hindex of 4, co-authored 4 publications receiving 130 citations.
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Journal ArticleDOI
WALLABY – an SKA Pathfinder H i survey
B. S. Koribalski,B. S. Koribalski,Lister Staveley-Smith,Tobias Westmeier,Paolo Serra,Kristine Spekkens,O. I. Wong,K. Lee-Waddell,Claudia del P. Lagos,Danail Obreschkow,Emma V. Ryan-Weber,Martin Zwaan,Virginia A. Kilborn,G. Bekiaris,Kenji Bekki,Frank Bigiel,Alessandro Boselli,Albert Bosma,Barbara Catinella,Garima Chauhan,Michelle E. Cluver,Michelle E. Cluver,Matthew Colless,Hélène M. Courtois,Robert A. Crain,W. J. G. de Blok,W. J. G. de Blok,W. J. G. de Blok,H. Dénes,Alan R. Duffy,A. Elagali,A. Elagali,Christopher J. Fluke,Bi-Qing For,George Heald,P. A. Henning,Kelley M. Hess,Kelley M. Hess,Benne W. Holwerda,Cullan Howlett,Thomas H. Jarrett,D. H. Jones,Michael G. Jones,Gyula I. G. Józsa,Russell J. Jurek,E. Jütte,Peter Kamphuis,I. D. Karachentsev,J. Kerp,D. Kleiner,D. Kleiner,Renee C. Kraan-Korteweg,Angel R. Lopez-Sanchez,J. P. Madrid,Martin Meyer,Jeremy Mould,C. Murugeshan,Ray P. Norris,Ray P. Norris,S. H. Oh,Tom Oosterloo,Tom Oosterloo,Attila Popping,Mary E. Putman,T. N. Reynolds,T. N. Reynolds,J. Rhee,Aaron S. G. Robotham,Stuart D. Ryder,Anke Schröder,Li Shao,Li Shao,Adam R. H. Stevens,Edward N. Taylor,J. M. van der Hulst,Lourdes Verdes-Montenegro,Bart P. Wakker,Jiali Wang,Jiali Wang,Matthew Whiting,Benjamin Winkel,Christian Wolf +81 more
TL;DR: The Widefield ASKAP L-band Legacy All-sky Blind Survey (wallaby) as discussed by the authors is a next-generation survey of neutral hydrogen (H i) in the Local Universe, which uses the widefield, high-resolution capability of the Australian Square Kilometer Array Pathfinder (ASKAP), a radio interferometer consisting of 36 dishes equipped with Phased-Array Feeds.
Journal ArticleDOI
WALLABY early science – III. An H i study of the spiral galaxy NGC 1566
Ahmed Elagali,Ahmed Elagali,Lister Staveley-Smith,J. Rhee,O. I. Wong,Albert Bosma,Tobias Westmeier,B. S. Koribalski,George Heald,B. Q. For,D. Kleiner,D. Kleiner,K. Lee-Waddell,J. P. Madrid,Attila Popping,T. N. Reynolds,T. N. Reynolds,Martin Meyer,James R. Allison,Claudia del P. Lagos,Maxim Voronkov,Paolo Serra,Lijing Shao,Lijing Shao,Jiali Wang,Craig S. Anderson,John D. Bunton,G. Bekiaris,Wilfred M. Walsh,Virginia A. Kilborn,P. Kamphuis,Se-Heon Oh +31 more
Abstract: This paper reports on the atomic hydrogen gas (HI) observations of the spiral galaxy NGC 1566 using the newly commissioned Australian Square Kilometre Array Pathfinder (ASKAP) radio telescope. We measure an integrated HI flux density of $180.2$ Jy km s$^{-1}$ emanating from this galaxy, which translates to an HI mass of $1.94\times10^{10}$M$_\circ$ at an assumed distance of $21.3$ Mpc. Our observations show that NGC 1566 has an asymmetric and mildly warped HI disc. The HI-to-stellar mass fraction of NGC 1566 is $0.29$, which is high in comparison with galaxies that have the same stellar mass ($10^{10.8}$M$_\circ$). We also derive the rotation curve of this galaxy to a radius of $50$ kpc and fit different mass models to it. The NFW, Burkert and pseudo-isothermal dark matter halo profiles fit the observed rotation curve reasonably well and recover dark matter fractions of $0.62$, $0.58$ and $0.66$, respectively. Down to the column density sensitivity of our observations ($N_{HI} = 3.7\times10^{19}$ cm$^{-2}$), we detect no HI clouds connected to, or in the nearby vicinity of, the HI disc of NGC 1566 nor nearby interacting systems. We conclude that, based on a simple analytic model, ram pressure interactions with the IGM can affect the HI disc of NGC 1566 and is possibly the reason for the asymmetries seen in the HI morphology of NGC 1566.
Journal ArticleDOI
WALLABY Early Science - IV. ASKAP H I imaging of the nearby galaxy IC 5201
D. Kleiner,D. Kleiner,B. S. Koribalski,Paolo Serra,Matthew Whiting,Tobias Westmeier,O. I. Wong,Peter Kamphuis,Attila Popping,G. Bekiaris,Ahmed Elagali,Ahmed Elagali,B. Q. For,K. Lee-Waddell,J. P. Madrid,T. N. Reynolds,T. N. Reynolds,J. Rhee,Lijing Shao,Lijing Shao,Lister Staveley-Smith,Jiali Wang,Craig S. Anderson,Jordan D. Collier,Jordan D. Collier,Jordan D. Collier,Stephen M. Ord,Maxim Voronkov +27 more
TL;DR: In this article, the authors presented a Wide-Field ASKAP L-Band Legacy All-sky Blind Surveys (WALLABY) study of the nearby spiral galaxy IC 5201 using the Australian Square Kilometre Array Pathfinder (ASKAP).
Journal ArticleDOI
WALLABY early science - I. The NGC 7162 galaxy group
T. N. Reynolds,T. N. Reynolds,Tobias Westmeier,Lister Staveley-Smith,A. Elagali,A. Elagali,Bi-Qing For,D. Kleiner,B. S. Koribalski,K. Lee-Waddell,J. P. Madrid,Attila Popping,J. Rhee,Matthew Whiting,O. I. Wong,Luke J. M. Davies,Simon P. Driver,Aaron S. G. Robotham,James R. Allison,G. Bekiaris,Jordan D. Collier,Jordan D. Collier,Jordan D. Collier,George Heald,Martin Meyer,Aaron Chippendale,A. Macleod,Maxim Voronkov +27 more
TL;DR: The Widefield ASKAP L-band Legacy All-sky Blind Survey (WALLABY) early science results from the Australian Square Kilometre Array Pathfinder (ASKAP) observations of the NGC 7162 galaxy group were presented in this paper.