Event Rate for Extreme Mass Ratio Burst Signals in the Laser Interferometer Space Antenna Band
| Autor: | Kelly Holley-Bockelmann, Lee Samuel Finn, Louis J. Rubbo |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Physics
Gravitational-wave observatory Stellar mass Gravitational wave Astronomy Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Mass ratio Galaxy Black hole General Relativity and Quantum Cosmology Space and Planetary Science Stellar dynamics Astrophysics::Galaxy Astrophysics Gravitational redshift |
| Zdroj: | The Astrophysical Journal. 649:L25-L28 |
| ISSN: | 1538-4357 0004-637X |
| Popis: | Stellar mass compact objects in short-period (P 103 s) orbits about a 104.5-107.5 M☉ massive black hole (MBH) are thought to be a significant continuous-wave source of gravitational radiation for the ESA/NASA Laser Interferometer Space Antenna (LISA) gravitational wave detector. These extreme mass ratio inspiral sources began in long-period, nearly parabolic orbits that have multiple close encounters with the MBH. The gravitational radiation emitted during the close encounters may be detectable by LISA as a gravitational wave burst if the characteristic passage timescale is less than 105 s. Scaling a static, spherical model to the size and mass of the Milky Way bulge, we estimate an event rate of ~15 yr-1 for such burst signals, detectable by LISA with signal-to-noise ratio greater than 5, originating in our Galaxy. When extended to include Virgo Cluster galaxies, our estimate increases to a gravitational wave burst rate of ~18 yr-1. We conclude that these extreme mass ratio burst sources may be a steady and significant source of gravitational radiation in the LISA data streams. |
| Databáze: | OpenAIRE |
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