Zobrazeno 1 - 10
of 87
pro vyhledávání: '"Ryan Leaman"'
Autor:
Alina Boecker, Nadine Neumayer, Annalisa Pillepich, Neige Frankel, Rahul Ramesh, Ryan Leaman, Lars Hernquist
We investigate the origin of stars in the innermost $500\,\mathrm{pc}$ of galaxies spanning stellar masses of $5\times10^{8-12}\,\mathrm{M}_{\odot}$ at $\mathrm{z=0}$ using the cosmological magnetohydrodynamical TNG50 simulation. Three different orig
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::958e4b50426728caa93f7cfbca0eea83
http://arxiv.org/abs/2301.11942
http://arxiv.org/abs/2301.11942
Autor:
Ignacio Trujillo, Ignacio Martn-Navarro, A. Vazdekis, Mireia Montes, Elham Eftekhari, Ryan Leaman, Anna Ferré-Mateu, Núria Salvador Rusiñol, Michael A. Beasley
Publikováno v:
Proceedings of the International Astronomical Union. 15:381-385
It is generally recognized that massive galaxies form through a combination of in-situ collapse and ex-situ accretion. The in-situ component forms early, where gas collapse and compaction leads to the formation of massive compact systems (blue and re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7567230dc2c74a57442bc41dba544c4b
https://doi.org/10.1017/s1743921320004020
https://doi.org/10.1017/s1743921320004020
Autor:
Alison Sills, Paolo Bianchini, T. Ruiz-Lara, Alina Boecker, Jeremy J. Webb, Jesús Falcón-Barroso, Nadine Neumayer, Ryan Leaman, Alessandra Mastrobuono-Battisti, Andrew A. Cole, Katja Fahrion, Anna C. Sippel, Michael A. Beasley
Publikováno v:
Mon.Not.Roy.Astron.Soc.
Mon.Not.Roy.Astron.Soc., 2020, 492 (4), pp.5102-5120. ⟨10.1093/mnras/staa004⟩
Mon.Not.Roy.Astron.Soc., 2020, 492 (4), pp.5102-5120. ⟨10.1093/mnras/staa004⟩
Recent photometric observations revealed a massive, extended (MGC ≳ 105 M⊙; Rh ∼ 14 pc) globular cluster (GC) in the central region (D3D ≲ 100 pc) of the low-mass (M* ∼ 5 × 106 M⊙) dwarf irregular galaxy Pegasus. This massive GC offers a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ed1e47c9404ccd1dd7e0a5bfa20ba0b1
https://doi.org/10.1093/mnras/staa004
https://doi.org/10.1093/mnras/staa004
Publikováno v:
Astronomy & Astrophysics
Nuclear star clusters (NSCs) are massive star clusters found ubiquitously in the centres of galaxies, from the dwarf regime to massive ellipticals and spirals. The fraction of nucleated galaxies is as high as $>$ 90 % at $M_{\text{gal}} \sim 10^9 M_\
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c52dfbe5944af0425526f420e7e3f140
Autor:
Ling Zhu, Glenn van de Ven, Ryan Leaman, Annalisa Pillepich, Lodovico Coccato, Yuchen Ding, Jesús Falcón-Barroso, Enrichetta Iodice, Ignacio Martin Navarro, Francesca Pinna, Enrico Maria Corsini, Dimitri A. Gadotti, Katja Fahrion, Mariya Lyubenova, Shude Mao, Richard McDermid, Adriano Poci, Marc Sarzi, Tim de Zeeuw
Publikováno v:
Astronomy & Astrophysics, 664:A115
We report the discovery of ancient massive merger events in the early-type galaxies NGC 1380 and NGC 1427, members of the Fornax galaxy cluster. Both galaxies have been observed by the MUSE IFU instrument on the VLT, as part of the Fornax3D project.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6004dfe1bb7c1b9a4c1930e9efd77fc5
https://doi.org/10.1051/0004-6361/202243109
https://doi.org/10.1051/0004-6361/202243109
Autor:
Katja Fahrion, Teodora-Elena Bulichi, Michael Hilker, Ryan Leaman, Mariya Lyubenova, Oliver Müller, Nadine Neumayer, Francesca Pinna, Marina Rejkuba, Glenn van de Ven
Nuclear star clusters (NSCs) are massive star clusters found in all types of galaxies from dwarfs to massive galaxies. Recent studies show that while low-mass NSCs in dwarf galaxies ($M_\text{gal} < 10^{9} M_\odot$) form predominantly out of the merg
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e0797776cd2442b9941583bf34769e88
Autor:
Nikolay Kacharov, Mayte Alfaro-Cuello, Nadine Neumayer, Nora Lützgendorf, Laura L. Watkins, Alessandra Mastrobuono-Battisti, Sebastian Kamann, Glenn van de Ven, Anil C. Seth, Karina T. Voggel, Iskren Y. Georgiev, Ryan Leaman, Paolo Bianchini, Torsten Böker, Steffen Mieske
We present comprehensive multi-component dynamical models of M54 (NGC6715), the nuclear star cluster of the Sagittarius dwarf galaxy (Sgr), which is undergoing a tidal disruption in the Milky Way halo. Previous papers in the series used a large MUSE
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f369da9d3126a3f0ee3927b283188488
Autor:
Ryan Leaman, Glenn van de Ven
We present a simple model for the host mass dependence of the galaxy nucleation fraction ($f_{nuc}$), the galaxy's nuclear star cluster (NSC) mass and the mass in its surviving globular clusters ($M_{GC,obs}$). Considering the mass and orbital evolut
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1e36802504332ad90aee41747f1d0b2d
http://arxiv.org/abs/2112.05573
http://arxiv.org/abs/2112.05573
Autor:
Harald Kuntschner, Ryan Leaman, Alina Boecker, Glenn van de Ven, Thomas A. Davison, Mark A. Norris
Publikováno v:
Monthly Notices of the Royal Astronomical Society
Galaxy mergers are instrumental in dictating the final mass, structure, stellar populations, and kinematics of galaxies. Cosmological galaxy simulations indicate that the most massive galaxies at z=0 are dominated by high fractions of `ex-situ' stars
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5df092c915c3e1489980e8583a532b30
Autor:
Paolo Bianchini, Torsten Böker, Ryan Leaman, Nora Lützgendorf, G. van de Ven, Alessandra Mastrobuono-Battisti, Mayte Alfaro-Cuello, N. Kacharov, Mariya Lyubenova, Laura L. Watkins, Anil C. Seth, Nadine Neumayer, Sebastian Kamann
Publikováno v:
Proceedings of the International Astronomical Union. 14:47-50
Nuclear star clusters hosted by dwarf galaxies exhibit similar characteristics to high-mass, metal complex globular clusters. This type of globular clusters could, therefore, be former nuclei from accreted galaxies. M54 resides in the photometric cen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::06239a987a14a013d2b15841126e4d40
https://doi.org/10.1017/s1743921319007907
https://doi.org/10.1017/s1743921319007907