منابع مشابه
Using Gravitational-wave Standard Sirens
Gravitational waves (GWs) from supermassive binary black hole (BBH) inspirals are potentially powerful standard sirens (the GW analog to standard candles) (Schutz 1986, 2002). Because these systems are well-modeled, the space-based GW observatory LISA will be able to measure the luminosity distance (but not the redshift) to some distant massive BBH systems with 1–10% accuracy. This accuracy is ...
متن کاملTuning Gravitationally Lensed Standard Sirens
Gravitational waves emitted by chirping supermassive black hole binaries could in principle be used to obtain very accurate distance determinations. Provided they have an electromagnetic counterpart from which the redshift can be determined, these standard sirens could be used to build a high redshift Hubble diagram. Errors in the distance measurements will most likely be dominated by gravitati...
متن کاملFinding the Electromagnetic Counterparts of Cosmological Standard Sirens
The gravitational waves (GW) emitted during the coalescence of supermassive black holes (SMBHs) in the mass range ∼ (10–10)M⊙/(1+z) will be detectable out to high redshifts with the future Laser Interferometric Space Antenna (LISA). The distance and direction to these “standard sirens” can be inferred directly from the GW signal, with a precision that depends on the masses, spins and geometry o...
متن کاملDelensing Gravitational Wave Standard Sirens with Shear and Flexion Maps
Supermassive black hole binary systems (SMBHB) are standard sirens – the gravitational wave analogue of standard candles – and if discovered by gravitational wave detectors, they could be used as precise distance indicators. Unfortunately, gravitational lensing will randomly magnify SMBHB signals, seriously degrading any distance measurements. Using a weak lensing map of the SMBHB line of sight...
متن کاملStem cell sirens
questions as to what should be done with those virus stocks, and whether more research with live pox viruses should be carried out. The recent WHO deliberations were triggered by the request of US scientists who want to use the virus or some of its genes for their research, while others call for the complete destruction of the remaining virus samples. Both sides are motivated by the fear of sma...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2005
ISSN: 0004-637X,1538-4357
DOI: 10.1086/431341