4,454 research outputs found
Basic Parameter Estimation of Binary Neutron Star Systems by the Advanced LIGO/Virgo Network
Within the next five years, it is expected that the Advanced LIGO/Virgo
network will have reached a sensitivity sufficient to enable the routine
detection of gravitational waves. Beyond the initial detection, the scientific
promise of these instruments relies on the effectiveness of our physical
parameter estimation capabilities. The majority of this effort has been towards
the detection and characterization of gravitational waves from compact binary
coalescence, e.g. the coalescence of binary neutron stars. While several
previous studies have investigated the accuracy of parameter estimation with
advanced detectors, the majority have relied on approximation techniques such
as the Fisher Matrix. Here we report the statistical uncertainties that will be
achievable for optimal detection candidates (SNR = 20) using the full parameter
estimation machinery developed by the LIGO/Virgo Collaboration via Markov-Chain
Monte Carlo methods. We find the recovery of the individual masses to be
fractionally within 9% (15%) at the 68% (95%) credible intervals for equal-mass
systems, and within 1.9% (3.7%) for unequal-mass systems. We also find that the
Advanced LIGO/Virgo network will constrain the locations of binary neutron star
mergers to a median uncertainty of 5.1 deg^2 (13.5 deg^2) on the sky. This
region is improved to 2.3 deg^2 (6 deg^2) with the addition of the proposed
LIGO India detector to the network. We also report the average uncertainties on
the luminosity distances and orbital inclinations of ideal detection candidates
that can be achieved by different network configurations.Comment: Second version: 15 pages, 9 figures, accepted in Ap
Theory and Rationality: Extending the Foucault/Habermas Debate
A review of: Critical Theory by David Hoy and Thomas McCarthy. Blackwell Publishers, 1994. Recovering Ethical Life: Jurgen Habermas and the Future of Critical Theory by J.M. Bernstein. Routledge, 1995
Some New Myxomycete Records for the Neotropics and Some Taxonomic Problems in the Myxomycetes
New myxomycete records for the neotropics and certain taxonomic problems are discussed. Attention is focused on the genus Diachea and particularly D. bulbillosa, Badhamia obovata, Didymium leoninum, and D. fluccosum
Alien Registration- Farr, Cora L. (Portland, Cumberland County)
https://digitalmaine.com/alien_docs/24497/thumbnail.jp
Measuring the star formation rate with gravitational waves from binary black holes
A measurement of the history of cosmic star formation is central to
understand the origin and evolution of galaxies. The measurement is extremely
challenging using electromagnetic radiation: significant modeling is required
to convert luminosity to mass, and to properly account for dust attenuation,
for example. Here we show how detections of gravitational waves from
inspiraling binary black holes made by proposed third-generation detectors can
be used to measure the star formation rate of massive stars with high precision
up to redshifts of ~10. Depending on the time-delay model, the predicted
detection rates ranges from ~1400 to ~16000 per month with the current
measurement of local merger rate density. With three months of observations,
parameters describing the volumetric star formation rate can be constrained at
the few percent level, and the volumetric merger rate can be directly measured
to 3% at z~2. Given a parameterized star formation rate, the characteristic
delay time between binary formation and merger can be measured to ~60%.Comment: 7 pages, 1 table, 4 fig
Alien Registration- Farr, Cora L. (Portland, Cumberland County)
https://digitalmaine.com/alien_docs/24497/thumbnail.jp
Alien Registration- Farr, Cora L. (Portland, Cumberland County)
https://digitalmaine.com/alien_docs/24497/thumbnail.jp
Unhappy Consciousness, One-Dimensionality, and the Possibility of Social Transformation
The present article departs from concepts and ideas thoroughly developed by Herbert Marcuse. As such, it deals with his approach concerning the possibility of social transformation, looking to problematize the obstacles and hardships associated to the ongoing forms of social domination. To take this through, central works such as Eros and civilization and One-dimensional man are taken up, along with a number of lesser known texts and posthumously published reflections. Asserting the influence of Hegel, Marx and Freud, it is considered possible to criticize some of the existing contradictions that mark capitalist relations, interpreting them dialectically and immanently to unveil the potentials for social change through democratic attunement
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