Double Compact Objects as Low-frequency Gravitational Wave Sources

Details Double Compact Objects as Low-frequency Gravitational Wave Sources Double Compact Objects as Low-frequency Gravitational Wave Sources

2008-11-10

arxiv.org/abs/0811.1602v3

Astrophys.J.725:816-823,2010

Astronomy and Astrophysics

Astrophysics

12 pages, ApJ accepted, major changes

Scientific paper

10.1088/0004-637X/725/1/816

We study the Galactic field population of double compact objects (NS-NS, BH-NS, BH-BH binaries) to investigate the number (if any) of these systems that can potentially be detected with LISA at low gravitational-wave frequencies. We calculate the Galactic numbers and physical properties of these binaries and show their relative contribution from the disk, bulge and halo. Although the Galaxy hosts 10^5 double compact object binaries emitting low-frequency gravitational waves, only a handful of these objects in the disk will be detectable with LISA, but none from the halo or bulge. This is because the bulk of these binaries are NS-NS systems with high eccentricities and long orbital periods (weeks/months) causing inefficient signal accumulation (small number of signal bursts at periastron passage in 1 yr of LISA observations) rendering them undetectable in the majority of these cases. We adopt two evolutionary models that differ in their treatment of the common envelope phase that is a major (and still mostly unknown) process in the formation of close double compact objects. Depending on the adopted evolutionary model, our calculations indicate the likely detection of about 4 NS-NS binaries and 2 BH-BH systems (model A; likely survival of progenitors through CE) or only a couple of NS-NS binaries (model B; suppression of the double compact object formation due to CE mergers).

Affiliated with

Also associated with

No associations

Rating

Double Compact Objects as Low-frequency Gravitational Wave Sources does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Double Compact Objects as Low-frequency Gravitational Wave Sources, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Double Compact Objects as Low-frequency Gravitational Wave Sources will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-542790