'Spin temperature' presentation slideshows

Cosmic 21-cm Fluctuations from Dark-Age Gas

Cosmic 21-cm Fluctuations from Dark-Age Gas. Kris Sigurdson Institute for Advanced Study Cosmo 2006 September 25, 2006. What are the properties of neutral hydrogen atoms 20 to 100 million years after the big bang? How do we calculate their observational signatures?. Kris Sigurdson

659 views • 56 slides

A Pulse EPR Primer

A Pulse EPR Primer. FIDs and Echoes . ESEEM Relaxation Time Measurement 2 + 1, DEER, ELDOR EXSY. Structural Elucidation Dynamics, Distances Measurement of Long Distances Measurement of Slow Inter & Intra-molecular Chemical Exchange and Molecular Motions. Applications. Topics.

900 views • 53 slides

Atomic physics and the cosmological 21 cm signal

Atomic physics and the cosmological 21 cm signal. Jonathan Pritchard (CfA). Collaborators: Steve Furlanetto (UCLA) Avi Loeb (CfA). Overview. 21 cm basics Wouthysen-Field Effect Heating of the IGM 21 cm fluctuations from spin temperature variation

652 views • 52 slides

A hot topic: the 21cm line II

A hot topic: the 21cm line II. Benedetta Ciardi. MPA. Timeline in cosmic history. Years since the Big Bang ~350000 (z~1300) ~100 million (z~20-40) ~1 billion (z~6) ~13 billion (z=0). Big Bang: the Universe is filled with hot plasma.

526 views • 44 slides

Power spectrum of the dark ages

512 views • 36 slides

The 21cm signature of the First Stars

The 21cm signature of the First Stars. Xuelei Chen ??? National Astronomical Observatory of China. KIAS workshop on cosmology and structure formation , Seoul, Korea, Sept 20, 2006. z ~ 1000. z ~ 30. z ~ 6. z ~ 0. The Cosmic History. ?. small perturbations. gravity.

506 views • 36 slides

Power spectrum of the dark ages

362 views • 36 slides

Laser driven sources of H/D for internal gas targets

Laser driven sources of H/D for internal gas targets. Ben Clasie MIT Laboratory for Nuclear Science C. Crawford, D. Dutta, H. Gao , J. Seely, W. Xu. 1. Outline. Introduction and motivation Physics motivation for polarized gas targets Storage rings and internal gas targets

452 views • 35 slides

Laser Driven Polarized H/D Sources and Targets

Laser Driven Polarized H/D Sources and Targets. PST 2003 Novosibirsk, Russia. Ben Clasie Laboratory for Nuclear Science Massachusetts Institute of Technology. Introduction Optical pumping Spin-temperature equilibrium Sources and targets Results from sources and targets

493 views • 32 slides

Jonathan Pritchard Steve Furlanetto Marc Kamionkowski (Caltech)

Descending from on high: Lyman series cascades and spin-kinetic temperature coupling in the 21cm line. Jonathan Pritchard Steve Furlanetto Marc Kamionkowski (Caltech). Overview. 21cm studies provide a way of probing the first galaxies ( Barkana & Loeb 2004 )

235 views • 15 slides

Jonathan Pritchard Steve Furlanetto Marc Kamionkowski (Caltech)

Descending from on high: Lyman series cascades and spin-kinetic temperature coupling in the 21cm line. Jonathan Pritchard Steve Furlanetto Marc Kamionkowski (Caltech). Overview. 21cm studies provide a way of probing the first galaxies ( Barkana & Loeb 2004 )

153 views • 15 slides