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It is Feasible to Directly Measure Black Hole Masses in the First Galaxies
Hamsa Padmanabhan, Abraham Loeb
In the local universe, black hole masses have been inferred from the observed increase in the velocities of stars at the centres of their host galaxies. So far, masses of supermass…
Intensity mapping: a new window into the cosmos
Hamsa Padmanabhan
The technique of intensity mapping (IM) has emerged as a powerful tool to explore the universe at . IM measures the integrated emission from sources over a broad range of fr…
Low-redshift 21cm Cosmology in Canada
Adrian Liu, Simon Foreman, Hamsa Padmanabhan +6
Line-intensity mapping of the 21cm line is a powerful probe of large scale structure at z<6, tracing large-scale structure via neutral hydrogen content that is found within galaxie…
Beyond CDM with HI intensity mapping: robustness of cosmological constraints in the presence of astrophysics
Stefano Camera, Hamsa Padmanabhan
Mapping the unresolved intensity of the 21-cm emission of neutral hydrogen (HI) is now regarded as one the most promising tools for cosmological investigation in the coming decades…
Cross-correlating 21 cm and galaxy surveys: implications for cosmology and astrophysics
Hamsa Padmanabhan, Alexandre Refregier, Adam Amara
We forecast astrophysical and cosmological parameter constraints from synergies between 21 cm intensity mapping and wide field optical galaxy surveys (both spectroscopic and photom…
Research and Development for HI Intensity Mapping
Zeeshan Ahmed, David Alonso, Mustafa A. Amin +51
Development of the hardware, data analysis, and simulation techniques for large compact radio arrays dedicated to mapping the 21 cm line of neutral hydrogen gas has proven to be mo…