Computer Science – Performance
Scientific paper
Mar 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004cqgra..21s1203b&link_type=abstract
Classical and Quantum Gravity, Volume 21, Issue 5, pp. S1203-S1208 (2004).
Computer Science
Performance
2
Scientific paper
The main LISA follow-on mission currently being discussed is one that would search with high sensitivity for a primordial gravitational wave background. To extend the discussion of possible astrophysical objectives, two other types of LISA follow-on missions will be considered here. In both cases the expected level of performance improvement is substantial. One is a mission that emphasizes higher sensitivity at frequencies of 0.003 to 10 Hz. The other aims for improved sensitivity at frequencies from 1 to 100 µHz. For the higher frequency mission, a factor 30 increase in the product of telescope area times the square root of laser power would be the goal. This could be achieved with 1 m diameter telescopes and 10 W of laser power. The arm length would be reduced to 0.5 million km, so that the total increase in GW sensitivity above 0.1 Hz would be a factor of 300. A factor 10 reduction in the test mass spurious accelerations at frequencies above 1 mHz would be included also. The main scientific objective would be to observe interactions of 10 Modot BHs with IMBHs out to large redshifts, if MBHs such as the few million Modot BHs observed now grew through the IMBH mass range. For the low frequency mission, 15 million km baselines and a factor 10 or more reduction in the spurious acceleration levels from 1 to 100 µHz would be the goals. The main objective would be the observation of many more MBH MBH binaries to learn about galaxy formation.
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