Measuring bulk flows with the kinematic Sunyaev-Zeldovich effect in CMB maps
- Fernando Atrio-Barandela 1
- Carlos Hernández-Monteagudo 1
- Alexander Kashlinsky 2
- 1 Física Teórica, Facultad de Ciencias, Universidad de Salamanca
- 2 Raytheon ITSS, Code 685, Goddard Space Flight Center, Greenbelt
Editorial: Springer
ISSN: 1431-2433
ISBN: 3540424687, 978-3-540-44665-1, 978-3-540-42468-0
Año de publicación: 2001
Páginas: 473-475
Tipo: Capítulo de Libro
Resumen
We propose a new method to measure the possible large-scale bulk flows in the Universe from cosmic microwave background temperature anisotropy maps. At each cluster position, temperature fluctuations are a combination of Sunyaev-Zeldovich kinematic and thermal components, cosmological fluctuations and instrument noise. When averaged over many clusters the last three will integrate down, whereas the first one will be dominated by a possible bulk flow component. We get that at the 95% confidence level the bulk flows on scales ≥100h−1Mpc can be probed down to the amplitude of < 200 km/sec with the MAP data and down to only ⋍30 km/sec with the Planck mission.