C.D.S. - SIMBAD4 rel 1.7 - 2020.07.12CEST15:08:22

2010ApJ...715L.138B - Astrophys. J., 715, L138-L141 (2010/June-1)

The effect of metallicity on the detection prospects for gravitational waves.


Abstract (from CDS):

Data from the Sloan Digital Sky Survey (∼300,000 galaxies) indicate that recent star formation (within the last 1 billion years) is bimodal: half of the stars form from gas with high amounts of metals (solar metallicity) and the other half form with small contribution of elements heavier than helium (∼10%-30% solar). Theoretical studies of mass loss from the brightest stars derive significantly higher stellar-origin black hole (BH) masses (∼30-80 M) than previously estimated for sub-solar compositions. We combine these findings to estimate the probability of detecting gravitational waves (GWs) arising from the inspiral of double compact objects. Our results show that a low-metallicity environment significantly boosts the formation of double compact object binaries with at least one BH. In particular, we find the GW detection rate is increased by a factor of 20 if the metallicity is decreased from solar (as in all previous estimates) to a 50-50 mixture of solar and 10% solar metallicity. The current sensitivity of the two largest instruments to neutron star-neutron star (NS-NS) binary inspirals (VIRGO: ∼9 Mpc; LIGO: ∼18) is not high enough to ensure a first detection. However, our results indicate that if a future instrument increased the sensitivity to ∼50-100 Mpc, a detection of GWs would be expected within the first year of observation. It was previously thought that NS-NS inspirals were the most likely source for GW detection. Our results indicate that BH-BH binaries are ∼25 times more likely sources than NS-NS systems and that we are on the cusp of GW detection.

Abstract Copyright:

Journal keyword(s): binaries: close - gravitation - stars: evolution - stars: neutron

Simbad objects: 4

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Number of rows : 4

N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
1 IC 10 G 00 20 23.16 +59 17 34.7   13.6 9.5     ~ 1008 0
2 NAME IC 10 X-1 HXB 00 20 29.09 +59 16 51.9           ~ 148 0
3 NGC 300 GiG 00 54 53.4460065856 -37 41 03.182962667 8.83 8.69 8.13 7.46   ~ 1306 2
4 NAME NGC 300 X-1 HXB 00 55 09.990 -37 42 12.16     22.44     WNE 103 1

    Equat.    Gal    SGal    Ecl

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