Výsledky vyhledávání

Frequencies, chaos and resonances: a study of orbital parameters of nearby thick disc and halo stars

Autor: Helmer H. Koppelman, Amina Helmi, Jorrit H. J. Hagen

Publikováno v: Astronomy & astrophysics, 647(March 2021):A37. EDP Sciences

We study the distribution of nearby thick disc and halo stars in subspaces defined by their characteristic orbital parameters. Our aim is to establish the origin of the structure reported in particular, in the $R_{\rm max}-z_{\rm max}$ space. To this

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9a6816992378207b00a7451658a16a5b
http://arxiv.org/abs/2009.04849

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Galactic dynamics in the era of Gaia

Autor: Jorrit H. J. Hagen

In this thesis we study the kinematics and dynamics of our Galaxy, the Milky Way. We use data from the Gaia space telescope, which measures the positions and velocities of the Milky Way stars with unprecedented accuracy.Under assumption of the standa

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f0818746b638f980b1a079bb7d23b659
https://doi.org/10.33612/diss.111512030

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The kinematics and surface mass density in the solar neighbourhood using TGASxRAVE

Autor: Jorrit H. J. Hagen, Amina Helmi

Publikováno v: Proceedings of the International Astronomical Union. 12:160-163

We investigate the kinematics of stars in the Solar neighbourhood by combining radial velocities from the latest data release of the RAVE survey with the Tycho-Gaia Astrometric Solution presented in Gaia Data Release 1. We use moments of the velocity

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2667b483d60efe2aa1dcabf8587ad65a
https://doi.org/10.1017/s1743921317005725

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The tilt of the velocity ellipsoid in the Milky Way with Gaia DR2

Autor: Lorenzo Posti, Jorrit H. J. Hagen, Amina Helmi, P. T. de Zeeuw

Publikováno v: Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2019, 629, pp.A70. ⟨10.1051/0004-6361/201935264⟩
Astronomy and Astrophysics (0004-6361), 629, A70
Astronomy & astrophysics, 629:A70, 1-14. EDP Sciences

The velocity distribution of stars is a sensitive probe of the gravitational potential of the Galaxy, and hence of its dark matter distribution. In particular, the shape of the dark halo (e.g. spherical, oblate, or prolate) determines velocity correl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b8b95155ebb8e8b70511b0cfb9c682e8
https://hdl.handle.net/1887/85074

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The CARMENES search for exoplanets around M dwarfs: High-resolution optical and near-infrared spectroscopy of 324 survey stars

Autor: S. Becerril, S. Reinhart, I. M. Ferro, Philipp Huke, E. Díez-Alonso, R. González-Peinado, M. Azzaro, Richard J. Mathar, Jose Antonio Pascual, A. Lamert, Javier López-Santiago, E. Mirabet, M. A. Sánchez Carrasco, Gilles Bergond, Ulrich Mall, D. Pérez Medialdea, Armin Huber, E. Herrero, E. Casal, S. V. Jeffers, Grzegorz Nowak, Sebastian Schafer, J. Helmling, S. Sadegi, H. Magán Madinabeitia, G. Veredas, M. Lampón, E. N. Johnson, W. Xu, Karl Wagner, M. L. García Vargas, David Barrado, J. H. M. M. Schmitt, Enric Palle, R. Oreiro, D. Baroch, B. Arroyo-Torres, Pedro J. Amado, C. Cifuentes, J. A. Marín Molina, D. Galadí-Enríquez, Stefan Dreizler, Cristina Rodríguez-López, Víctor J. S. Béjar, A. Rodríguez Trinidad, M. Lafarga, I. Hermelo, V. M. Passegger, H. W. Rix, H. Anwand-Heerwart, Juan Carlos Suárez, Florian Rodler, Martin Kürster, M. Kim, P. Schöfer, J. Klüter, M. Tala, R.-R. Rohloff, D. Benítez, Johana Panduro, Lisa Nortmann, Andreas Quirrenbach, Z. M. Berdiñas, J. Schiller, J. López-González, S. Czesla, P. Rhode, Adrian Kaminski, A. Pavlov, Holger Mandel, L. Hernández Castaño, J. I. Vico Linares, C. Feiz, Guillem Anglada-Escudé, L. F. Sarmiento, Susana Martín-Ruiz, Simon Tulloch, A. P. Hatzes, Jesús Aceituno, Eike W. Guenther, M. Pluto, Juan Carlos Morales, Manuel López-Puertas, M. Ammler-von Eiff, M. R. Zapatero Osorio, R. G. Ulbrich, Otmar Stahl, M. López del Fresno, Emilio Marfil, Reinhard Mundt, Lluis Gesa, Evangelos Nagel, Werner Laun, Josep Colomé, Francesc Vilardell, M. C. Cárdenas Vázquez, J. F. López Salas, Jose A. Caballero, M. Blümcke, A. Ramón, Aviv Ofir, E. de Guindos, Ana Pérez-Calpena, S. Pedraz, Ralf Launhardt, Rainer Lenzen, A. Claret, Sabine Reffert, U. Lemke, Luigi Mancini, J. B. P. Strachan, F. J. Alonso-Floriano, M. A. C. Perryman, Fei Yan, Mathias Zechmeister, Ernesto Sánchez-Blanco, Vianak Naranjo, A. Klutsch, Lev Tal-Or, M. Fernandez, J. Guàrdia, F. Hernández Hernando, Ulrich Grözinger, Walter Seifert, V. Gómez Galera, Luisa Lara, R. P. Hedrosa, Rafael Rebolo, A. Guijarro, E. de Juan, A. Sánchez-López, Rafael Luque, M. Brinkmöller, Paula Sarkis, J. Stürmer, Ovidio Rabaza, J. I. González Hernández, C. del Burgo, A. Rosich, Andreas Schweitzer, D. Montes, Miguel Abril, M. E. Moreno-Raya, H. J. Hagen, S. Grohnert, Birgit Fuhrmeister, P. Redondo, F. F. Bauer, E. Rodriguez, Ralf Klein, R. Antona, A. Garcia-Piquer, J. Cano, Trifon Trifonov, A. Moya, Ansgar Reiners, Jorge Sanz-Forcada, Peter H. Hauschildt, E. Solano, J. Winkler, Manuel Perger, R. Hernández Arabí, Ignasi Ribas, C. J. Marvin, Th. Henning, V. Wolthoff, D. Maroto Fernández, Juan Gutiérrez-Soto, M. Cortés-Contreras, Eduardo L. Martín, Hugo M. Tabernero

Publikováno v: Digital.CSIC. Repositorio Institucional del CSIC
instname
RUA. Repositorio Institucional de la Universidad de Alicante
Universidad de Alicante (UA)
Astronomy and Astrophysics
NASA Astrophysics Data System
Astronomy & Astrophysics
Astronomy & Astrophysics, 612, A49
E-Prints Complutense: Archivo Institucional de la UCM
Universidad Complutense de Madrid
E-Prints Complutense. Archivo Institucional de la UCM

The CARMENES radial velocity (RV) survey is observing 324 M dwarfs to search for any orbiting planets. In this paper, we present the survey sample by publishing one CARMENES spectrum for each M dwarf. These spectra cover the wavelength range 520¿171

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a25ac3d7d85fb30e9d8193e2ffa98e65
http://hdl.handle.net/10261/209346

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The CARMENES Search for Exoplanets around M Dwarfs: A Low-mass Planet in the Temperate Zone of the Nearby K2-18

Publikováno v: E-Prints Complutense: Archivo Institucional de la UCM
Universidad Complutense de Madrid
E-Prints Complutense. Archivo Institucional de la UCM
instname
Digital.CSIC. Repositorio Institucional del CSIC
The Astronomical Journal

K2-18 is a nearby M2.5 dwarf, located at 34 pc and hosting a transiting planet that was first discovered by the K2 mission and later confirmed with Spitzer Space Telescope observations. With a radius of ∼2 R and an orbital period of ∼33 days, the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3ab6c7f1afb0cbc783bbba0e1c159b2a
https://eprints.ucm.es/id/eprint/49192/1/davidmontes88libre.pdf

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CARMENES: high-resolution spectra and precise radial velocities in the red and infrared

Autor: R. Gonzalez Peinado, Ralf Launhardt, Lluis Gesa, C. del Burgo, F. F. Bauer, M. Doellinger, R. P. Hedrosa, J. Carro, Jose A. Caballero, Z. M. Berdiñas, D. Montes, Ulrich Mall, M. Blümcke, M. Kehr, S. Schäfer, D. Pérez-Medialdea, M. Salz, Mercedes López-Morales, E. N. Johnson, V. Wolthoff, A. Rosich, Mathias Zechmeister, P. Redondo, E. Mirabet, E. Díez-Alonso, Johana Panduro, L. Hernández Castaño, P. Rhode, I. Hermelo, David Barrado, Enric Palle, Walter Seifert, Manuel Perger, Javier López-Santiago, D. Benítez, E. Herrero, S. Sabotta, Víctor J. S. Béjar, M. L. García-Vargas, S. Becerril, M. J. López González, Rainer Lenzen, Luigi Mancini, M. Lafarga, A. Kaminski, P. Schöfer, M. E. Moreno-Raya, R.-R. Rohloff, H. W. Rix, C. J. Marvin, Ignasi Ribas, R. Garrido, J. A. Marín Molina, D. Hermann, Emilio Marfil, J. H. M. M. Schmitt, M. Pluto, M. Cortés-Contreras, Reinhard Mundt, M. A. Sánchez Carrasco, L. González-Cuesta, Th. Henning, J. Klüter, M. Tala Pinto, D. Galadí-Enríquez, P. Huke, J. Pascual, M. López del Fresno, Grzegorz Nowak, Trifon Trifonov, M. Llamas, P. H. Hauschildt, G. Veredas, N. Lodieu, E. de Juan, J. B. P. Strachan, S. Sadegi, W. Xu, O. Herbort, E. de Guindos, J. Sanz-Forcada, M. Lampón, Michael Perryman, K. F. Huber, Josep Colomé, Denis Shulyak, M. Kim, J. Aceituno, Lisa Nortmann, Andreas Quirrenbach, Juan Carlos Suárez, C. Cardona Guillén, Ana Pérez-Calpena, A. Claret, Martin Kürster, Werner Laun, J. Cano, Lev Tal-Or, A. Garcia-Piquer, F. J. Alonso-Floriano, B. Arroyo-Torres, A. Klutsch, Hubert Klahr, H. Martínez-Rodríguez, Ulrich Grözinger, O. Stahl, S. Pedraz, S. Martin-Ruiz, M. Azzaro, J. L. Lizon, C. Feiz, Manuel López-Puertas, M. Ammler-von Eiff, M. R. Zapatero Osorio, Rafael Luque, I. Gallardo, Guillem Anglada-Escudé, L. Sairam, J. F. López Salas, H. Mandel, A. Ramón, D. Hidalgo, N. Labiche, J. Guàrdia, F. Hernández Hernando, U. Lemke, Francesc Vilardell, E. González-Álvarez, J. Stürmer, Hugo M. Tabernero, G. Bergondy, R. Hernández Arabí, Vianak Naranjo, J. Winkler, Armin Huber, Fei Yan, B. Fuhrmeister, Rafael Rebolo, Simon Tulloch, Ansgar Reiners, F. J. Lázaro, A. P. Hatzes, H. Magán Madinabeitia, Paula Sarkis, J. Helmling, Z. Zhao, Sabine Reffert, E. Casal, A. Sánchez-López, M. C. Gálvez-Ortiz, J. I. González Hernández, D. Hintz, D. Baroch, A. Lamert, E. L. Martín, A. Schweitzer, Evangelos Nagel, V. Gómez Galera, M. Fernández, A. Guijarro, C. Cifuentes, E. Sánchez-Blanco, R. G. Ulbrich, Carlo Schmidt, F. Labarga, Pedro J. Amado, V. M. Passegger, F. J. Abellán, S. Grohnert, F. Rodler, Ricardo Dorda, Clemens Storz, G. Gaisné, K. Frölich, A. Moya, Juan Carlos Morales, E. W. Guenther, E. Rodriguez, H. J. Hagen, Ralf Klein, D. Maroto Fernández, I. M. Ferro, Karl Wagner, L. M. Lara, S. Dreizler, S. Czesla, M. Brinkmöller, M. C. Cardenas, Enrique Solano, M. Vidal-Dasilva, C. Rodríguez López, M. Abril, G. Holgado, J. Schiller, L. F. Sarmiento, A. Pavlov, H. Anwand-Heerwart, S. V. Jeffers, S. Reinhart, J. L. Vico Linares, Richard J. Mathar

Publikováno v: Digital.CSIC. Repositorio Institucional del CSIC
instname
Ground-based and Airborne Instrumentation for Astronomy VII
E-Prints Complutense: Archivo Institucional de la UCM
Universidad Complutense de Madrid
E-Prints Complutense. Archivo Institucional de la UCM

The design and construction of CARMENES has been presented at previous SPIE conferences. It is a next-generation radial-velocity instrument at the 3.5m telescope of the Calar Alto Observatory, which was built by a consortium of eleven Spanish and Ger

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fe64040285b9758e517f21e77afe9b09
http://hdl.handle.net/10261/216240

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The vertical force in the Solar Neighbourhood using red clump stars in TGASxRAVE - Constraints on the local dark matter density

Autor: Amina Helmi, Jorrit H. J. Hagen

Publikováno v: Astronomy and astrophysics, 615:A99. EDP Sciences

We investigate the kinematics of red clump stars in the Solar Neighbourhood by combining data from TGAS and RAVE to constrain the local dark matter density. After calibrating the absolute magnitude of red clump stars, we characterize their velocity d

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e372664f8d79c045cae2f7b26c0bd130

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Axisymmetric Schwarzschild models of an isothermal axisymmetric mock dwarf spheroidal galaxy

Autor: Amina Helmi, Jorrit H. J. Hagen, Maarten A. Breddels

Publikováno v: Astronomy & astrophysics, 632:99. EDP Sciences

We test the ability of Schwarzschild's orbit superposition method in measuring the mass content, scale radius and shape of a flattened dwarf spheroidal galaxy. Until now, most dynamical model efforts have assumed that dwarf spheroidal galaxies and th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e9d03ac0d0db64f54990a8859b44af9d
https://doi.org/10.1051/0004-6361/201936196

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