The population of galaxies that contribute to the H <scp>i</scp> mass function

Dutta, Saili; Khandai, Nishikanta; Dey, Biprateep

doi:10.1093/mnras/staa864

Cited by 9 publications

(3 citation statements)

References 85 publications

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“…However, as we will show later the blue galaxies are actually more correlated with the neutral hydrogen than the red galaxies, which is consistent with previous works (e.g. Dutta et al (2020); Wolz et al (2022), as blue galaxies are usually more HI-rich than red galaxies.…”

Section: Power Spectrum and Cosmological Parameters Estimationsupporting

confidence: 92%

Forecasting the cross-correlation of the CSST galaxy survey with the FAST H i Intensity Map

Deng

Gong

Wang

et al. 2022

Monthly Notices of the Royal Astronomical Society

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The cross-correlation of optical galaxies with the neutral hydrogen (HI) radiation intensity can enhance the signal-to-noise ratio (SNR) of the H i intensity measurement. In this paper, we investigate the cross-correlation of the galaxy samples obtained by the spectroscopic survey of the China Space Station Telescope (CSST) with the H i Intensity mapping (IM) survey of the Five-hundred-meter Aperture Spherical Telescope (FAST). Using the IllusitrisTNG simulation result at redshift 0.2 ∼ 0.3, we generate mock data of the CSST survey and a FAST L-band drift scan survey. The CSST spectroscopic survey can yield a sample of galaxies with a high comoving number density of $10^{-2} ({\ \rm Mpc}/h)^{-3}$ at z ∼ 0.3. We cross-correlate the foreground-removed radio intensity with the CSST galaxies, including both the whole sample, and red and blue galaxy sub-samples separately. We find that in all cases the H i and optical galaxies are well correlated. The total H i abundance can be measured with a high precision from this correlation. A relative error of $\sim 0.6{{\%}}$ for $\Omega _{\rm H\, \small {I}}$ could be achieved at z ∼ 0.3 for an overlapping survey area of $10000 {\ \rm deg}^2$.

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Section: Power Spectrum and Cosmological Parameters Estimationsupporting

confidence: 92%

Forecasting the cross-correlation of the CSST galaxy survey with the FAST H i Intensity Map

Deng

Gong

Wang

et al. 2022

Monthly Notices of the Royal Astronomical Society

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“…• Our mocks can predict the Hi mass function of (massive) galaxies selected by optical luminosity or colour. The corresponding measurements have only recently become available (Dutta et al 2020;Dutta & Khandai 2021), and will be very useful for testing our basic assumptions regarding the connection between optical properties and Hi.…”

Section: Discussionmentioning

confidence: 99%

Multi-wavelength mock galaxy catalogs of the low-redshift Universe

Paranjape,

Choudhury,

Sheth

2021

Preprint

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We present a new suite of mock galaxy catalogs mimicking the low-redshift Universe, based on an updated halo occupation distribution (HOD) model and a scaling relation between optical properties and the neutral hydrogen (Hi) content of galaxies. Our algorithm is constrained by observations of the luminosity function and luminosityand colour-dependent clustering of SDSS galaxies, as well as the Hi mass function and Hi-dependent clustering of massive Hi-selected galaxies in the ALFALFA survey. Mock central and satellite galaxies with realistic values of r-band luminosity, g − r and u − r colour, stellar mass and Hi mass are populated in an N -body simulation, inheriting a number of properties of the density and tidal environment of their host halos. The host halo of each central galaxy is also 'baryonified' with realistic spatial distributions of stars as well as hot and cold gas, along with the corresponding rotation curve. Our default HOD assumes that galaxy properties are a function of group halo mass alone, and can optionally include effects such as galactic conformity and colour-dependent galaxy assembly bias. The mocks predict the relation between the stellar mass and Hi mass of massive Hi galaxies, as well as the 2-point cross-correlation function of spatially co-located optical and Hi-selected samples. These mocks form the basis of a number of applications we will pursue in other work, such as novel null tests for galaxy assembly bias, predictions for the Hi velocity width function and testing the universality of the radial acceleration relation.

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“…These surveys, expected to be much more sensitive than the last generation surveys like AL-FALFA (Martin et al, 2010;Haynes et al, 2018) and HIPASS (Zwaan et al, 2005), will probe galaxy populations and the large scale structure in this window out to much larger distances. Earlier surveys have given us adequate information about the HI mass function (HIMF) at low redshifts (Zwaan et al, 1997) and combining with optical observations (Springob et al, 2005) has already given us a wealth of insight into the correlation of colors, optical properties and the HI mass (Dutta et al, 2020;, and circular velocities of galaxies (Papastergis et al, 2013). The long term plan is to develop an insight into the relation of HI mass and star formation and hence formation and evolution of galaxies.…”

Section: Introductionmentioning

confidence: 99%

Upcoming SKA precursor surveys and sensitivity to HI mass function

Bharti,

Bagla

2023

Preprint

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We describe a simulation for the distribution of galaxies focusing on the atomic Hydrogen content. Our aim is to make predictions for surveys of galaxies using the redshifted 21 cm line emission. We take the expected distribution of HI masses, circular velocities, sizes of galaxies and orientations into account for this simulation. We use the sensitivity of ASKAP and MeeKAT radio telescopes to estimate the number of detections of HI galaxies in upcoming surveys. We validate our simulation with earlier estimates carried out by using some of these considerations. We show that unlike earlier simulations that take some of the factors into account, the predicted number of galaxies and their distribution across masses changes significantly when all of these are accounted for. We describe our predictions for the MIGHTEE-HI and WALLABY surveys for blind detection of galaxies using the redshifted 21 cm radiation. We study the dependence of the predicted number of detections on the HI mass function. We also describe our future plans for improving the simulation.

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The population of galaxies that contribute to the H i mass function

Cited by 9 publications

References 85 publications

Forecasting the cross-correlation of the CSST galaxy survey with the FAST H i Intensity Map

Forecasting the cross-correlation of the CSST galaxy survey with the FAST H i Intensity Map

Multi-wavelength mock galaxy catalogs of the low-redshift Universe

Upcoming SKA precursor surveys and sensitivity to HI mass function

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