Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Ann-Marie Madigan"'
Publikováno v:
The Astrophysical Journal Letters, Vol 966, Iss 1, p L4 (2024)
The surfaces of many white dwarfs are polluted by metals, implying a recent accretion event. The tidal disruption of planetesimals is a viable source of white dwarf pollution and offers a unique window into the composition of exoplanet systems. The q
Externí odkaz:
https://doaj.org/article/3bf0ccfd5c8d478fb1d7b7c9d2d6df3d
Autor:
Alexander Zderic, Ann-Marie Madigan
Publikováno v:
The Astrophysical Journal Letters, Vol 948, Iss 1, p L1 (2023)
Disks of low-mass bodies scattered by giant planets to large semimajor axis and constant periapsis orbits are vulnerable to a buckling instability. This instability exponentially grows orbital inclinations, raises periapsis distances, and coherently
Externí odkaz:
https://doaj.org/article/0d7ac325dd4146c892acb15577a83625
Autor:
Tatsuya Akiba, Ann-Marie Madigan
Publikováno v:
The Astrophysical Journal, Vol 958, Iss 2, p 137 (2023)
Gravitational-wave recoil kicks from merging supermassive black hole binaries can have a profound effect on the surrounding stellar population. In this work, we study the dynamic and kinematic properties of nuclear star clusters following a recoil ki
Externí odkaz:
https://doaj.org/article/8241a427ed204aa49989a47eb639c05a
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 509:685-692
An overwhelming majority of galactic spiral arms trail with respect to the rotation of the galaxy, though a small sample of leading spiral arms has been observed. The formation of these leading spirals is not well understood. Here we show, using coll
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6c01128a4c01bb7d79d1b8d978787224
https://doi.org/10.1093/mnras/stab2904
https://doi.org/10.1093/mnras/stab2904
Autor:
Tatsuya Akiba, Ann-Marie Madigan
The anisotropic emission of gravitational waves during the merger of two supermassive black holes can result in a recoil kick of the merged remnant. We show here that eccentric nuclear disks - stellar disks of eccentric, apse-aligned orbits - can dir
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5bed5cf50b8c46d6e3043aab02047c98
http://arxiv.org/abs/2110.10163
http://arxiv.org/abs/2110.10163
Autor:
Alexander Zderic, Maria Tiongco, Angela Collier, Heather Wernke, Aleksey Generozov, Ann-Marie Madigan
Axisymmetric disks of eccentric orbits in near-Keplerian potentials are unstable to an out-of-plane buckling. Recently, Zderic et al. (2020) showed that an idealized disk saturates to a lopsided mode. Here we show that this apsidal clustering also oc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::65b8e22d7d9db842ca14890289876003
http://arxiv.org/abs/2106.09739
http://arxiv.org/abs/2106.09739
The nucleus of our nearest, large galactic neighbor, M31, contains an eccentric nuclear disk--a disk of stars on eccentric, apsidally-aligned orbits around a supermassive black hole (SMBH). Previous studies of eccentric nuclear disks considered only
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1c3eaa2c9deb7fd34ad4f3681a04180c
http://arxiv.org/abs/2010.15957
http://arxiv.org/abs/2010.15957
Autor:
Aleksey Generozov, Ann-Marie Madigan
Our Galactic center contains young stars, including the few million year old clockwise disk between 0.05 and 0.5 pc from the Galactic center, and the S-star cluster of B-type stars at a galactocentric distance of ~0.01 pc. Recent observations suggest
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::53f08a58bd03501f26683c0c028594bf
http://arxiv.org/abs/2002.10547
http://arxiv.org/abs/2002.10547
Autor:
Heather N. Wernke, Ann-Marie Madigan
Publikováno v:
The Astrophysical Journal. 920:149
The Andromeda Galaxy hosts an elongated nucleus with (at least) two distinct brightness peaks. The double nucleus can be explained by the projection of a thick, apsidally-aligned eccentric nuclear disk of stars in orbit about the central black hole.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8eb98ff75c13733f3891a3fecdd3b0de
https://doi.org/10.3847/1538-4357/ac19ad
https://doi.org/10.3847/1538-4357/ac19ad
Disks of low-mass bodies on high-eccentricity orbits in near-Keplerian potentials can be dynamically unstable to buckling out of the plane. In this letter, we present $N$-body simulations of the long-term behavior of such a system, finding apsidal cl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a84f140c1de74d6ca7ea419b73459575