ausblenden:
Schlagwörter:
-
Zusammenfassung:
On August 14, 2017 at 10
∶
30:43 UTC, the Advanced Virgo detector and the two Advanced LIGO
detectors coherently observed a transient gravitational-wave signal produced by the coalescence of two
stellar mass black holes, with a false-alarm rate of
≲
1
in 27 000 years. The signal was observed with a
three-detector network matched-filter signal-to-noise ratio of 18. The inferred masses of the initial black
holes are
30
.
5
þ
5
.
7
−
3
.
0
M
⊙
and
25
:
3
þ
2
.
8
−
4
.
2
M
⊙
(at the 90% credible level). The luminosity distance of the source is
540
þ
130
−
210
Mpc, corresponding to a redshift of
z
¼
0
.
11
þ
0
.
03
−
0
.
04
. A network of three detectors improves the sky
localization of the source, reducing the area of the 90% credible region from
1160
deg
2
using only the two
LIGO detectors to
60
deg
2
using all three detectors. For the first time, we can test the nature of
gravitational-wave polarizations from the antenna response of the LIGO-Virgo network, thus enabling a
new class of phenomenological tests of gravity.