On the identification of individual image types of a lensed system using higher-order modes. (arXiv:2110.06873v1 [gr-qc])
<a href="http://arxiv.org/find/gr-qc/1/au:+Janquart_J/0/1/0/all/0/1">Justin Janquart</a>, <a href="http://arxiv.org/find/gr-qc/1/au:+Seo_E/0/1/0/all/0/1">Eungwang Seo</a>, <a href="http://arxiv.org/find/gr-qc/1/au:+Hannuksela_O/0/1/0/all/0/1">Otto A. Hannuksela</a>, <a href="http://arxiv.org/find/gr-qc/1/au:+Li_T/0/1/0/all/0/1">Tjonnie G. F. Li</a>, <a href="http://arxiv.org/find/gr-qc/1/au:+Broeck_C/0/1/0/all/0/1">Chris Van Den Broeck</a>

Similarly to light, gravitational waves can be gravitationally lensed as they
propagate near massive astrophysical objects such as galaxies, stars, or black
holes. In recent years, forecasts have suggested a reasonable chance of strong
gravitational-wave lensing detections with the LIGO-Virgo-Kagra detector
network at design sensitivity. As a consequence, methods to analyze lensed
detections have seen rapid development. However, the impact of higher-order
modes on the lensing analyses is still under investigation. In this work, we
show that the presence of higher-order modes enables the identification of the
individual images types for the observed gravitational-wave events when two
lensed images are detected, which would lead to unambiguous identification of
lensing. In addition, we show that we can analyze higher-order-mode content
with greater accuracy with strongly lensed gravitational wave events.

Similarly to light, gravitational waves can be gravitationally lensed as they
propagate near massive astrophysical objects such as galaxies, stars, or black
holes. In recent years, forecasts have suggested a reasonable chance of strong
gravitational-wave lensing detections with the LIGO-Virgo-Kagra detector
network at design sensitivity. As a consequence, methods to analyze lensed
detections have seen rapid development. However, the impact of higher-order
modes on the lensing analyses is still under investigation. In this work, we
show that the presence of higher-order modes enables the identification of the
individual images types for the observed gravitational-wave events when two
lensed images are detected, which would lead to unambiguous identification of
lensing. In addition, we show that we can analyze higher-order-mode content
with greater accuracy with strongly lensed gravitational wave events.

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