Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Excitation of gravitational wave modes by a center-of-mass velocity of
  the source   Most gravitational wave (GW) sources are moving relative to us. This motion
is often closely related to the environment of the source and can thus provide
crucial information about the formation of the source and its host. Recently,
LIGO and Virgo detected for the first time the subdominant modes of GWs. We
show that a motion of the center-of-mass of the source can affect these modes,
where the effect is proportional to the velocity of the source. The effect on
the GW modes in turn affects the overall frequency of the GW, thus leading to a
phase shift. We study the impact of this effect on LIGO/Virgo detections and
show that it is detectable for sources with high mass ratios and inclinations.
This effect breaks the degeneracy between mass and Doppler shift in GW
observations, and opens a new possibility of detecting the motion of a GW
source even for constant velocities.

1
The categories of this paper are: cs
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th