Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Matthieu Portail"'
Publikováno v:
MNRAS
We present an analytic model of the stellar mass distribution of the Milky Way bar. The model is obtained by fitting a multi-component parametric density distribution to a made-to-measure N-body model of Portail et al., constructed to match a variety
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::58b16533d5289345aaf0ab0adf2138aa
Publikováno v:
Proceedings of the International Astronomical Union. 13:90-93
We have measured the IMF of the inner Galaxy using ~3000 OGLE-III microlensing events. Each event’s timescale depends on both the lens mass, and the velocities and distances of the lens and source. New dynamical models were used provide the distrib
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5f874531f0921501d6db0b6f702a67cb
https://doi.org/10.1017/s1743921317007542
https://doi.org/10.1017/s1743921317007542
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 465:1621-1644
We construct a large set of dynamical models of the galactic bulge, bar and inner disk using the Made-to-Measure method. Our models are constrained to match the red clump giant density from a combination of the VVV, UKIDSS and 2MASS infrared surveys
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::56f9f3e67ba18a4da0dd0a92ef767272
https://doi.org/10.1093/mnras/stw2819
https://doi.org/10.1093/mnras/stw2819
Publikováno v:
Monthly Notices of the Royal Astronomical Society: Letters. 464:L80-L84
We have used N-body simulations for the Milky Way to investigate the kinematic and structural properties of the old metal-poor stellar halo in the barred inner region of the Galaxy. We find that the extrapolation of the density distribution for bulge
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4b75088617074efc5046f58633ebc865
https://doi.org/10.1093/mnrasl/slw189
https://doi.org/10.1093/mnrasl/slw189
Autor:
Christopher Wegg, Ortwin Gerhard, Matthieu Portail, M. Fabricius, Ralf Bender, Roberto P. Saglia, Matias Blaña Díaz, Michael Opitsch, Peter Erwin
The Andromeda galaxy (M31) contains a box/peanut bulge (BPB) entangled with a classical bulge (CB) requiring a triaxial modelling to determine the dynamics, stellar and dark matter mass. We construct made-to-measure models fitting new VIRUS-W IFU bul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0d1b682e82a6f847b2eaf32b12f83aa0
Publikováno v:
Monthly Notices of the Royal Astronomical Society: Letters. 450:L66-L70
Recent observations have discovered the presence of a Box/Peanut or X-shape structure in the Galactic bulge. Such Box/Peanut structures are common in external disc galaxies, and are well-known in N-body simulations where they form following the buckl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::897d2469f99594d2fdf9b536f4ed4dfb
https://doi.org/10.1093/mnrasl/slv048
https://doi.org/10.1093/mnrasl/slv048
We use the timescale distribution of ~3000 microlensing events measured by the OGLE-III survey, together with accurate new made-to-measure dynamical models of the Galactic bulge/bar region, to measure the IMF in the inner Milky Way. The timescale of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6512cc09d5a99d52d75d4265dcf6f25f
http://arxiv.org/abs/1706.04193
http://arxiv.org/abs/1706.04193
Publikováno v:
NASA Astrophysics Data System
We present the first self-consistent chemodynamical model fitted to reproduce data for the galactic bulge, bar and inner disk. We extend the Made-to-Measure method to an augmented phase-space including the metallicity of stars, and show its first app
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a2557d4ee1c1da9fe2ae05444968d4f0
http://arxiv.org/abs/1704.07821
http://arxiv.org/abs/1704.07821
We propose a novel explanation for the Hercules stream consistent with recent measurements of the extent and pattern speed of the Galactic bar. We have adapted a made-to-measure dynamical model tailored for the Milky Way to investigate the kinematics
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0e14c906d3d726d3f308cdc7c3b3e1fb
Publikováno v:
Astrophysics and Space Science Proceedings ISBN: 9783319193298
The Galactic bar and box/peanut bulge can be studied in an unrivaled manner, star-by-star, with detailed chemical information and full 3D kinematics. Because of intervening dust this is greatly facilitated by the availability of wide field deep NIR p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::563e345b2a755236ddabddd2a2c497cb
https://doi.org/10.1007/978-3-319-19330-4_5
https://doi.org/10.1007/978-3-319-19330-4_5