PC 1643+4631A, B: THE LYMAN-α FOREST AT THE EDGE OF COHERENCE
نویسندگان
چکیده
منابع مشابه
Pc 1643+4631a,b: the Lyman-α Forest at the Edge of Coherence
This is the first measurement and detection of coherence in the intergalactic medium (IGM) at substantially high redshift (z∼3.8) and on large physical scales (∼2.5 h 70 Mpc). We perform the measurement by presenting new observations of the high redshift quasar pair PC 1643+4631A, B and their Lyα absorber coincidences. With data collected from Keck I Low Resolution Imaging Spectrometer (LRIS) i...
متن کاملMg Simulations of the Lyman-α Forest
Our understanding of the Lyman-α forest has received a great boost with the advent of the Keck Telescope and large 3D hydro-dynamical simulations. We present new simulations using the SPH technique with a P 3 MG (Particle-Particle Particle-MultiGrid) non-periodic gravity solver. Our method employs a high resolution (1 kpc) inner volume , essential for capturing the complex gas physics, a larger...
متن کاملThe Lyman-α Forest According to Luqas
1 Institute of Astronomy, Madingley Road, CB3 0HA Cambridge, UK 2 INAF-Osservatorio Astronomico di Trieste, via G.B. Tiepolo 11, I-34131 Trieste, Italy 3 Institute for Astronomy, University of Edinburgh, Blackford Hill, Edinburgh EH9 3HJ 4 Harvard-Smithsonian Center for Astrohpysics, 60 Garden Street, Cambridge, MA 02198, USA 5 Dipartimento di Fisica ‘Galileo Galilei’ e INFN Sez. di Padova, via...
متن کاملInferring the Linear Power Spectrum from the Lyman-α Forest
We discuss the determination of the linear power spectrum of dark matter fluctuations from measurements of the transmitted flux Ly-α Forest power spectrum. We show that at most scales probed by current measurements, the flux power spectrum is significantly affected by non-linear corrections to the linear dark matter power spectrum due to gravitational clustering. Inferring the linear dark matte...
متن کاملCosmology with the Lyman-α Forest in the Wmap Era
In the WMAP era of high precision cosmology an accurate determination of the matter power spectrum from Lyman-α forest data becomes crucial. When combining the matter power spectrum derived from CMB experiments with that inferred from Lyman-α absorption an evidence for a running spectral index and a primordial index n < 1 arises (Verde et al. 2003). In this talk, I will describe some results ob...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astronomical Journal
سال: 2008
ISSN: 0004-6256,1538-3881
DOI: 10.1088/0004-6256/136/1/181