398 citations · 1.9k across the 38 of their papers we have counts for
12 papers · 1 filter
Galaxy And Mass Assembly (GAMA): The group HI mass as a function of halo mass
Ajay Dev, Simon P. Driver, Martin Meyer +11
We determine the atomic hydrogen (HI) to halo mass relation (HIHM) using Arecibo Legacy Fast ALFA survey HI data at the location of optically selected groups from the Galaxy and Ma…
The BINGO Project I: Baryon Acoustic Oscillations from Integrated Neutral Gas Observations
Elcio Abdalla, Elisa G. M. Ferreira, Ricardo G. Landim +43
Observations of the redshifted 21-cm line of neutral hydrogen (HI) are a new and powerful window of observation that offers us the possibility to map the spatial distribution of co…
A first quantification of the effects of absorption for HI Intensity Mapping experiments
Sambit Roychowdhury, Clive Dickinson, Ian W. A. Browne
HI Intensity Mapping (IM) will be used to do precision cosmology using many existing and upcoming radio observatories. The signal will be contaminated due to absorption, the larges…
Cosmology with Phase 1 of the Square Kilometre Array; Red Book 2018: Technical specifications and performance forecasts
Square Kilometre Array Cosmology Science Working Group, David J. Bacon, Richard A. Battye +44
We present a detailed overview of the cosmological surveys that will be carried out with Phase 1 of the Square Kilometre Array (SKA1), and the science that they will enable. We hig…
Impact of Simulated 1/f Noise for HI Intensity Mapping Experiments
Stuart Harper, Clive Dickinson, Richard Battye +5
Cosmology has entered an era where the experimental limitations are not due to instrumental sensitivity but instead due to inherent systematic uncertainties in the instrumentation…
Update on the BINGO 21cm intensity mapping experiment
Richard Battye, Ian Browne, Tianyue Chen +21
21cm intensity mapping is a novel approach aimed at measuring the power spectrum of density fluctuations and deducing cosmological information, notably from the Baryonic Acoustic O…
The intrinsic shapes of dwarf irregular galaxies
Sambit Roychowdhury, Jayaram N. Chengalur, Igor D. Karachentsev +1
We use the measured B band axial ratios of galaxies from an updated catalog of Local Volume galaxies to determine the intrinsic shape of dwarf irregular galaxies (de Vacouleurs' mo…
Atomic hydrogen, star formation and feedback in the lowest mass Blue Compact Dwarf galaxies
Sambit Roychowdhury, Jayaram N. Chengalur, Kristin Chiboucas +3
We present the results from a search for HI emission from a sample of newly discovered dwarf galaxies in the M81 group. HI is detected in three galaxies, all of which are classifie…
The radio - far infrared correlation in the faintest star forming dwarf galaxies
Sambit Roychowdhury, Jayaram N. Chengalur
We study the radio - far-infrared (FIR) correlation in a sample of faint dwarf irregular galaxies using NVSS data for 1.4 GHz radio flux, Spitzer MIPS 70 um data for FIR flux, and…
Small Bites: Star formation recipes in extreme dwarfs
Sambit Roychowdhury, Jayaram N. Chengalur, Serafim S. Kaisin +2
We study the relationship between the gas column density (Sigma_HI) and the star formation rate surface density (Sigma_SFR) for a sample of extremely small (M_B ~ -13, Delta V_50 ~…
Thick gas discs in faint dwarf galaxies
Sambit Roychowdhury, Jayaram N. Chengalur, Ayesha Begum +1
We determine the intrinsic axial ratio distribution of the 'gas' disks of extremely faint M_B > -14.5 dwarf irregular galaxies. We start with the measured (beam corrected) distribu…
Star formation in extremely faint dwarf galaxies
Sambit Roychowdhury, Jayaram N. Chengalur, Ayesha Begum +1
We study the relationship between the gas column density (derived from GMRT 21 cm data) and the star formation rate surface density (derived from publicly available GALEX data) for…