Velocity-induced Acoustic Oscillations at Cosmic Dawn

@article{Muoz2019VelocityinducedAO,
  title={Velocity-induced Acoustic Oscillations at Cosmic Dawn},
  author={Julian B. Mu{\~n}oz},
  journal={arXiv: Cosmology and Nongalactic Astrophysics},
  year={2019}
}
  • Julian B. Muñoz
  • Published 2019
  • Physics
  • arXiv: Cosmology and Nongalactic Astrophysics
The redshifted 21-cm line of hydrogen holds great potential for the study of cosmology, as it can probe otherwise unobservable cosmic epochs. In particular, measurements of the 21-cm power spectrum during cosmic dawn---the era when the first stars were formed---will provide us with a wealth of information about the astrophysics of stellar formation, as well as the origin of fluctuations in our Universe. In addition to their usually considered density fluctuations, dark matter and baryons… Expand
Standard Ruler at Cosmic Dawn.
TLDR
It is found that three years of 21-cm power-spectrum data from the upcoming HERA interferometer should be able to measure the Hubble expansion rate H(z) at z=15-20 to percent-level precision, ranging from 0.3% to 11% depending on the strength of astrophysical feedback processes and foregrounds. Expand
High-redshift 21cm Cosmology in Canada
In the next few years, the 21cm line will enable direct observations of the Dark Ages, Cosmic Dawn, and Reionization, which represent previously unexplored periods in our cosmic history. With aExpand
Cosmic Expansion History from Line-Intensity Mapping.
TLDR
It is shown that present and future experiments can gradually improve the measurement precision of the expansion rate history, ultimately reaching percent-level constraints on the BAO scale. Expand
A tale of two sites – I. Inferring the properties of minihalo-hosted galaxies from current observations
The very first galaxies that started the cosmic dawn likely resided in so-called "minihaloes", with masses of $\sim10^5$-$10^8\mathrm{M}_\odot$, accreting their gas from the intergalactic mediumExpand
User's guide to extracting cosmological information from line-intensity maps
Line-intensity mapping (LIM) provides a promising way to probe cosmology, reionization and galaxy evolution. However, its sensitivity to cosmology and astrophysics at the same time is also aExpand
Data Analysis for Precision 21 cm Cosmology
TLDR
This review provides a pedagogical introduction to state-of-the-art ideas in 21 cm data analysis, covering a wide variety of steps in a typical analysis pipeline, from calibration to foreground subtraction to mapmaking to power spectrum estimation to parameter estimation. Expand
Probing the Small-Scale Matter Power Spectrum with Large-Scale 21-cm Data
The distribution of matter fluctuations in our universe is key for understanding the nature of dark matter and the physics of the early cosmos. Different observables have been able to map thisExpand
Concerns regarding the use of black hole shadows as standard rulers
Recently, Tsupko et al. have put forward the very interesting proposal to use the shadows of high-redshift supermassive black holes (SMBHs) as standard rulers. This would in principle allow us toExpand
21cmFAST v3: A Python-integrated C code for generating 3D realizations of the cosmic 21cm signal
TLDR
This brief code paper presents a new Python-wrapped version of the popular 21cm cosmology simulator, 21cmFAST, which maintains the same core functionality of previous versions, but features a simple and intuitive interface, and a great deal more flexibility. Expand
Standard Models and What Lies Beyond
The backbone of particle physics and cosmology consists of two Standard Models, providing the mathematical description of these two fields.
...
1
2
...

References

SHOWING 1-10 OF 228 REFERENCES
Standard Ruler at Cosmic Dawn.
TLDR
It is found that three years of 21-cm power-spectrum data from the upcoming HERA interferometer should be able to measure the Hubble expansion rate H(z) at z=15-20 to percent-level precision, ranging from 0.3% to 11% depending on the strength of astrophysical feedback processes and foregrounds. Expand
The Rise of the First Stars: Supersonic Streaming, Radiative Feedback, and 21-cm Cosmology
Understanding the formation and evolution of the first stars and galaxies represents one of the most exciting frontiers in astronomy. Since the universe was filled with hydrogen atoms at early times,Expand
Baryonic acoustic oscillations in 21-cm emission: a probe of dark energy out to high redshifts
Low-frequency observatories are currently being constructed with the goal of detecting red-shifted 21-cm emission from the epoch of reionization. These observatories will also be able to detectExpand
Charting the parameter space of the 21-cm power spectrum
The high-redshift 21-cm signal of neutral hydrogen is expected to be observed within the next decade and will reveal epochs of cosmic evolution that have been previously inaccessible. Due to the lackExpand
21-cm Fluctuations from Charged Dark Matter.
TLDR
Here, for the first time, the 21-cm fluctuations caused by a charged subcomponent of the dark matter are computed, including both the pre- and postrecombination evolution of all fluids, thus providing a novel probe of dark matter at cosmic dawn. Expand
The signature of the first stars in atomic hydrogen at redshift 20
TLDR
A simulation of the distribution of the first stars at redshift 20 is reported, finding that the 21-centimetre hydrogen signature of these stars is an enhanced fluctuation signal on the hundred-megaparsec scale, characterized by a flat power spectrum with prominent baryon acoustic oscillations. Expand
The 21-cm signature of the first stars during the Lyman-Werner feedback era
The formation of the first stars is an exciting frontier area in astronomy. Early redshifts (z ∼ 20) have become observationally promising as a result of a recently recognized effect of a supersonicExpand
Reconstructing the nature of the first cosmic sources from the anisotropic 21-cm signal.
TLDR
It is shown that on observable scales, the anisotropy is large and thus measurable at most redshifts, and its form tracks the evolution of 21-cm fluctuations as they are produced early on by Lyman-α radiation fromstars, then switch to x-ray radiation from early heating sources, and finally to ionizing radiation from stars. Expand
The rich complexity of 21-cm fluctuations produced by the first stars
We explore the complete history of the 21-cm signal in the redshift range z = 7-40. This redshift range includes various epochs of cosmic evolution related to primordial star formation, and should beExpand
Inferring the astrophysics of reionization and cosmic dawn from galaxy luminosity functions and the 21-cm signal
The properties of the first galaxies, expected to drive the Cosmic Dawn (CD) and the Epoch of Reionization (EoR), are encoded in the 3D structure of the cosmic 21-cm signal. Parameter inference fromExpand
...
1
2
3
4
5
...