| Online-Ressource |
Verfasst von: | Sarli-Waizmann, Eleonora [VerfasserIn]  |
| Meyer, Sven [VerfasserIn]  |
| Meneghetti, Massimo [VerfasserIn]  |
| Konrad, Sara [VerfasserIn]  |
| Majer, Charles Ludwig [VerfasserIn]  |
| Bartelmann, Matthias [VerfasserIn]  |
Titel: | Reconstructing the projected gravitational potential of galaxy clusters from galaxy kinematics |
Verf.angabe: | Eleonora Sarli, Sven Meyer, Massimo Meneghetti, Sara Konrad, Charles L. Majer, and Matthias Bartelmann |
E-Jahr: | 2014 |
Jahr: | 07 October 2014 |
Umfang: | 9 S. |
Teil: | volume:570 |
| year:2014 |
| extent:9 |
Fussnoten: | Gesehen am 16.07.2020 |
Titel Quelle: | Enthalten in: Astronomy and astrophysics |
Ort Quelle: | Les Ulis : EDP Sciences, 1969 |
Jahr Quelle: | 2014 |
Band/Heft Quelle: | 570(2014) Artikel-Nummer A9, 9 Seiten |
ISSN Quelle: | 1432-0746 |
Abstract: | We have developed a method for reconstructing the two-dimensional, projected gravitational potential of galaxy clusters from observed line-of-sight velocity dispersions of cluster galaxies. It is the second in an intended series of papers aiming at a unique reconstruction method for cluster potentials that combine lensing, X-ray, Sunyaev-Zel’dovich and kinematic data. The observed galaxy velocity dispersions are deprojected using the Richardson-Lucy algorithm. The obtained radial velocity dispersions are then related to the gravitational potential by using the tested assumption of a polytropic relation between the effective galaxy pressure and the density. Once the gravitational potential is obtained in three dimensions, projection along the line of sight yields the two-dimensional potential. For simplicity we adopt spherical symmetry and a known profile for the anisotropy parameter of the galaxy velocity dispersions. We tested the method with a numerically simulated galaxy cluster and the galaxies identified therein and performed the reconstruction for three different lines of sight. We extracted a projected velocity-dispersion profile from the simulated cluster and passed it through our algorithm, showing that the deviation between the true and the reconstructed gravitational potential is ≲10% within ≈ 1.5 <i>h<i/><sup>-1<sup/> Mpc from the cluster centre. |
DOI: | doi:10.1051/0004-6361/201321748 |
URL: | Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.
Volltext ; Verlag: https://doi.org/10.1051/0004-6361/201321748 |
| Volltext: https://www.aanda.org/articles/aa/abs/2014/10/aa21748-13/aa21748-13.html |
| DOI: https://doi.org/10.1051/0004-6361/201321748 |
Datenträger: | Online-Ressource |
Sprache: | eng |
K10plus-PPN: | 1724929577 |
Verknüpfungen: | → Zeitschrift |
Reconstructing the projected gravitational potential of galaxy clusters from galaxy kinematics / Sarli-Waizmann, Eleonora [VerfasserIn]; 07 October 2014 (Online-Ressource)