Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Veljanoski, Jovan"'
Autor:
Mackey, Dougal, Lewis, Geraint F., Brewer, Brendon J., Ferguson, Annette M. N., Veljanoski, Jovan, Huxor, Avon P., Collins, Michelle L. M., Côté, Patrick, Ibata, Rodrigo A., Irwin, Mike J., Martin, Nicolas, McConnachie, Alan W., Peñarrubia, Jorge, Tanvir, Nial, Wan, Zhen
Large galaxies grow through the accumulation of dwarf galaxies. In principle it is possible to trace this growth history using the properties of a galaxy's stellar halo. Previous investigations of the galaxy M31 (Andromeda) have shown that outside a
Externí odkaz:
http://arxiv.org/abs/1910.00808
Autor:
Mackey, Dougal, Ferguson, Annette, Huxor, Avon, Veljanoski, Jovan, Lewis, Geraint, McConnachie, Alan, Martin, Nicolas, Ibata, Rodrigo, Irwin, Mike, Côté, Patrick, Collins, Michelle, Tanvir, Nial, Bate, Nicholas
We utilise the final catalogue from the Pan-Andromeda Archaeological Survey to investigate the links between the globular cluster system and field halo in M31 at projected radii $R_p=25-150$ kpc. In this region the cluster radial density profile exhi
Externí odkaz:
http://arxiv.org/abs/1810.10719
Autor:
Helmi, Amina, Babusiaux, Carine, Koppelman, Helmer H., Massari, Davide, Veljanoski, Jovan, Brown, Anthony G. A.
The assembly process of our Galaxy can be retrieved using the motions and chemistry of individual stars. Chemo-dynamical studies of the nearby halo have long hinted at the presence of multiple components such as streams, clumps, duality and correlati
Externí odkaz:
http://arxiv.org/abs/1806.06038
We explore the phase-space structure of nearby halo stars identified kinematically from Gaia DR2 data. We focus on their distribution in velocity and in "integrals of motion" space as well as on their photometric properties. Our sample of stars selec
Externí odkaz:
http://arxiv.org/abs/1804.11347
Autor:
Koppelman, Helmer H., Virginiflosia, Titania, Posti, Lorenzo, Veljanoski, Jovan, Helmi, Amina
There is long tradition extending more than a century on the identification of moving groups in the Solar neighborhood. However, with the advent of large kinematic surveys, and especially of the upcoming Gaia data releases there is a need for more so
Externí odkaz:
http://arxiv.org/abs/1804.07530
Autor:
Veljanoski, Jovan, Helmi, Amina
Stellar halos contain tracers of the assembly history of massive galaxies like our own. Exploiting the synergy between the TGAS and the spectroscopic RAVE surveys, Helmi et al. (2017) recently discovered several distinct substructures in the Solar ne
Externí odkaz:
http://arxiv.org/abs/1804.06365
Publikováno v:
A&A 621, A13 (2019)
Extended stellar haloes are a natural by-product of the hierarchical formation of massive galaxies. If merging is a non-negligible factor in the growth of our Galaxy, evidence of such events should be encoded in its stellar halo. Reliable identificat
Externí odkaz:
http://arxiv.org/abs/1804.05245
Publikováno v:
A&A 618, A13 (2018)
We present a new Python library called vaex, to handle extremely large tabular datasets, such as astronomical catalogues like the Gaia catalogue, N-body simulations or any other regular datasets which can be structured in rows and columns. Fast compu
Externí odkaz:
http://arxiv.org/abs/1801.02638
The dynamically selected stellar halo of the Galaxy with Gaia and the tilt of the velocity ellipsoid
Publikováno v:
A&A 615, A70 (2018)
We study the dynamical properties of halo stars located in the Solar Neighbourhood. Our goal is to explore how the properties of the halo depend on the selection criteria used for defining a sample of halo stars. Once this is understood we proceed to
Externí odkaz:
http://arxiv.org/abs/1711.04766
Autor:
Veljanoski, Jovan
Understanding the formation and evolution of galaxies is one of the most active areas of research in astrophysics. Hierarchical merging of proto-galactic fragments to build more massive galaxies is the current preferred model. A key prediction of thi
Externí odkaz:
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.630374