Earth rotation and timedomain reconstruction of polarization states for continuous gravitational waves from known pulsars
Abstract
We consider the effects of the Earth's rotation on antenna patterns of a groundbased gravitational wave (GW) detector in a general metric theory that allows at most six polarization states (two spin0, two spin1, and two spin2) in a fourdimensional spacetime. By defining the cyclically averaged antenna matrix for continuous GWs from a known pulsar, we show that waveforms for each polarization state can be uniquely reconstructed in a time domain from a given set of the strain outputs at a single detector. Constraining the propagation speed of extra polarization modes, if they coexist with the transversetraceless modes, is also discussed. We also examine possible effects due to the lengthofday modulation as well as a secular change in the pulsar spin period.
 Publication:

Physical Review D
 Pub Date:
 July 2022
 DOI:
 10.1103/PhysRevD.106.024051
 arXiv:
 arXiv:2202.00171
 Bibcode:
 2022PhRvD.106b4051K
 Keywords:

 General Relativity and Quantum Cosmology;
 Astrophysics  High Energy Astrophysical Phenomena;
 High Energy Physics  Phenomenology;
 High Energy Physics  Theory
 EPrint:
 10 pages, 5 figures, nonsinusoidal waveforms added, Earth and pulsar spin modulations discussed, pulsar glitch mentioned, computational cost estimated, accepted for PRD