Prospects for observing extreme-mass-ratio inspirals with LISA

11th International LISA Symposium

Gair, Jonathan R.^1 ; Babak, Stanislav^2 ; Sesana, Alberto^3 ; Amaro-Seoane, Pau^4,5,6,7 ; Barausse, Enrico^8,9 ; Berry, Christopher P. L.^3 ; Berti, Emanuele^10,11 ; Sopuerta, Carlos^4

School of Mathematics, University of Edinburgh, King's Buildings, Peter Guthrie Tait Road, Edinburgh

EH9 3FD, United Kingdom^1

Max Planck Institute for Gravitational Physics, Albert Einstein Institute, Am Mühlenberg 1, Golm

14476, Germany^2

School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham

B15 2TT, United Kingdom^3

Institut de Ciències de l'Espai (CSIC-IEEC), Campus UAB, Carrer de Can Magrans s/n, Cerdanyola del Vallès

08193, Spain^4

Kavli Institute for Astronomy and Astrophysics, Beijing

100871, China^5

Institute of Applied Mathematics, Academy of Mathematics and Systems Science, CAS, Beijing

100190, China^6

Zentrum für Astronomie und Astrophysik, TU Berlin, Hardenbergstraße 36, Berlin

10623, Germany^7

Sorbonne Universités, UPMC Univesité Paris 6, UMR 7095, Institut d'Astrophysique de Paris, 98 bis Bd Arago, Paris

75014, France^8

CNRS, UMR 7095, Institut d'Astrophysique de Paris, 98 bis Bd Arago, Paris

75014, France

(10) Department of Physics and Astronomy, University of Mississippi, University

MS

38677, United States

(11) CENTRA, Departamento de Física, Instituto SuperiorTécnico, Universidade de Lisboa, Avenida Rovisco Pais 1, Lisboa

1049, Portugal^9

关键词: Astrophysical sources;    Compact objects;    Fundamental physics;    Laser interferometer space antenna;    Mass ratio;    Massive black holes;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/840/1/012021/pdf
DOI  :  10.1088/1742-6596/840/1/012021

来源: IOP

【 摘 要 】

One of the key astrophysical sources for the Laser Interferometer Space Antenna (LISA) are the inspirals of stellar-origin compact objects into massive black holes in the centres of galaxies. These extreme-mass-ratio inspirals (EMRIs) have great potential for astrophysics, cosmology and fundamental physics. In this paper we describe the likely numbers and properties of EMRI events that LISA will observe. We present the first results computed for the 2.5 Gm interferometer that was the new baseline mission submitted in January 2017 in response to the ESA L3 mission call. In addition, we attempt to quantify the astrophysical uncertainties in EMRI event rate estimates by considering a range of different models for the astrophysical population. We present both likely event rates and estimates for the precision with which the parameters of the observed sources could be measured. We finish by discussing the implications of these results for science using EMRIs.