The Hercules stream as seen by APOGEE-2 South
Author | dc.contributor.author | Hunt, Jason A. S. | |
Author | dc.contributor.author | Bovy, Jo | |
Author | dc.contributor.author | Pérez Villegas, Angeles | |
Author | dc.contributor.author | Holtzman, Jon A. | |
Author | dc.contributor.author | Sobeck, Jennifer | |
Author | dc.contributor.author | Chojnowski, Drew | |
Author | dc.contributor.author | Santana, Felipe A. | |
Author | dc.contributor.author | Palicio, Pedro A. | |
Author | dc.contributor.author | Wegg, Christopher | |
Author | dc.contributor.author | Gerhard, Ortwin | |
Author | dc.contributor.author | Almeida, Andres | |
Author | dc.contributor.author | Bizyaev, Dmitry | |
Author | dc.contributor.author | Fernández Trincado, Jose G. | |
Author | dc.contributor.author | Lane, Richard R. | |
Author | dc.contributor.author | Longa Peña, Penélope | |
Author | dc.contributor.author | Majewski, Steven R. | |
Author | dc.contributor.author | Pan, Kaike | |
Author | dc.contributor.author | Roman Lópes, Alexandre | |
Admission date | dc.date.accessioned | 2018-07-27T19:18:39Z | |
Available date | dc.date.available | 2018-07-27T19:18:39Z | |
Publication date | dc.date.issued | 2018 | |
Cita de ítem | dc.identifier.citation | Monthly Notices of The Royal Astronomical Society 474, 95–101 (2018) | es_ES |
Identifier | dc.identifier.other | 10.1093/mnras/stx2777 | |
Identifier | dc.identifier.uri | https://repositorio.uchile.cl/handle/2250/150391 | |
Abstract | dc.description.abstract | The Hercules stream is a group of comoving stars in the solar neighbourhood, which can potentially be explained as a signature of either the outer Lindblad resonance (OLR) of a fast Galactic bar or the corotation resonance (CR) of a slower bar. In either case, the feature should be present over a large area of the disc. With the recent commissioning of the APOGEE-2 Southern spectrograph we can search for the Hercules stream at (l, b)=(270 degrees, 0), a direction in which the Hercules stream, if caused by the bar's OLR, would be strong enough to be detected using only the line-of-sight velocities. We clearly detect a narrow, Hercules-like feature in the data that can be traced from the solar neighbourhood to a distance of about 4 kpc. The detected feature matches well the line-of-sight velocity distribution from the fast-bar (OLR) model. Confronting the data with a model where the Hercules stream is caused by the CR of a slower bar leads to a poorer match, as the corotation model does not predict clearly separated modes, possibly because the slow-bar model is too hot. | es_ES |
Patrocinador | dc.description.sponsorship | Dunlap Fellowship at the Dunlap Institute for Astronomy Astrophysics University of Toronto Natural Sciences and Engineering Research Council of Canada Alfred P. Sloan Fellowship Chilean Ministry of Economy, Development and Tourism's Millennium Science Initiative IC120009 STFC/Newton Fund ST/M007995/1 CONICYT/Newton Fund DPI20140114 MINEDUC-UA project ANT 1655 Alfred P. Sloan Foundation U.S. Department of Energy Office of Science Center for High-Performance Computing at the University of Utah | es_ES |
Lenguage | dc.language.iso | en | es_ES |
Publisher | dc.publisher | Oxford University Press | es_ES |
Type of license | dc.rights | Attribution-NonCommercial-NoDerivs 3.0 Chile | * |
Link to License | dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/cl/ | * |
Source | dc.source | Monthly Notices of The Royal Astronomical Society | es_ES |
Keywords | dc.subject | Galaxy bulge | es_ES |
Keywords | dc.subject | Galaxy disc | es_ES |
Keywords | dc.subject | Galaxy fundamental parameters | es_ES |
Keywords | dc.subject | Galaxy kinematics and dynamics | es_ES |
Keywords | dc.subject | Solar neighbourhood | es_ES |
Keywords | dc.subject | Galaxy structure | es_ES |
Título | dc.title | The Hercules stream as seen by APOGEE-2 South | es_ES |
Document type | dc.type | Artículo de revista | |
Cataloguer | uchile.catalogador | tjn | es_ES |
Indexation | uchile.index | Artículo de publicación ISI | es_ES |
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