Premerger Localization of Gravitational Wave Standard Sirens with LISA: Triggered Search for an Electromagnetic Counterpart
Premerger Localization of Gravitational Wave Standard Sirens with LISA: Triggered Search for an Electromagnetic Counterpart
复制标题
用 LISA 对引力波标准警报器进行预合并定位：触发搜索电磁对应物
DOI：
10.1086/590230
复制
发表时间：
2007
期刊：
影响因子：
--
通讯作者：
K. Menou
中科院分区：
文献类型：
--
作者：
B. Kocsis;Z. Haiman;K. Menou
电磁（EM）对应的SMBH二进制合并观察到的丽莎可以本地化的天文仪器（~10 deg 2）小时到数周前合并的视野内。任何即时EM对应物与引力定时合并的时间重合可能提供了识别唯一宿主星系的最佳机会。我们讨论了搜索这种即时EM同行所带来的挑战，并提出了新的观察策略来解决这些问题。特别是，我们讨论的丽莎定位误差椭圆的大小和形状演变的天空和量化的相应要求，专门的EM调查的区域合并之前。一个触发的EM对应搜索活动将需要监测几平方度的区域。例如，它可以瞄准光学波段中2 - 4 -27等的变化，这对应于z = 1-2时约106-107 M BHs的主要丽莎源的爱丁顿光度的1%-10%，时间尺度为分钟到小时，这是双星在合并的最后2-4周的轨道时间尺度。任何可变EM信号的周期与10-1000个周期内的准周期重力波形的互相关可以帮助检测。或者，EM搜索可以检测伴随聚结的瞬态信号。触发搜索将是雄心勃勃的，但如果他们成功地识别出一个独特的即时EM对应物，他们将能够对引力物理进行新的基本测试。我们强调测量的光子和引力子从同一宇宙源的到达时间的差异，作为一个有价值的独立测试的大规模字符的重力和可能违反洛伦兹不变性的重力部门。
Electromagnetic (EM) counterparts to SMBH binary mergers observed by LISA can be localized to within the field of view of astronomical instruments (~10 deg2) hours to weeks prior to coalescence. The temporal coincidence of any prompt EM counterpart with a gravitationally timed merger may offer the best chance of identifying a unique host galaxy. We discuss the challenges posed by searches for such prompt EM counterparts and propose novel observational strategies to address them. In particular, we discuss the size and shape evolution of the LISA localization error ellipses on the sky and quantify the corresponding requirements for dedicated EM surveys of the area prior to coalescence. A triggered EM counterpart search campaign will require monitoring a several square degree area. It could aim for variability at the 24-27 mag level in optical bands, for example, which corresponds to 1%-10% of the Eddington luminosity of the prime LISA sources of ~106-107 M☉ BHs at z = 1–2, on timescales of minutes to hours, the orbital timescale of the binary in the last 2-4 weeks of coalescence. A cross-correlation of the period of any variable EM signal with the quasi-periodic gravitational waveform over 10-1000 cycles may aid the detection. Alternatively, EM searches can detect a transient signal accompanying the coalescence. The triggered searches will be ambitious, but if they successfully identify a unique prompt EM counterpart, they will enable new fundamental tests of gravitational physics. We highlight the measurement of differences in the arrival times of photons and gravitons from the same cosmological source as a valuable independent test of the massive character of gravity and of possible violations of Lorentz invariance in the gravity sector.
影响因子：
8.6
作者：
José A. González;U. Sperhake;B. Brügmann;M. Hannam;S. Husa
通讯作者：
José A. González;U. Sperhake;B. Brügmann;M. Hannam;S. Husa