Zobrazeno 1 - 10
of 419
pro vyhledávání: '"Chengalur, Jayaram N."'
In time-domain radio astronomy with arrays, voltages from individual antennas are added together with proper delay and fringe correction to form the beam in real-time. In order to achieve the correct phased addition of antenna voltages one has to als
Externí odkaz:
http://arxiv.org/abs/2407.06741
We present the first estimate, based on direct HI 21 cm observations, of the HI mass function (HIMF) of star-forming galaxies at $z\approx1$, obtained by combining our measurement of the scaling relation between HI mass ($M_{HI}$) and B-band luminosi
Externí odkaz:
http://arxiv.org/abs/2404.06546
We present here estimates of the average rates of accretion of neutral gas onto main-sequence galaxies and the conversion of atomic gas to molecular gas in these galaxies at two key epochs in galaxy evolution: (i) $z\approx1.3-1.0$, towards the end o
Externí odkaz:
http://arxiv.org/abs/2311.00025
Star-forming galaxies are believed to replenish their atomic gas reservoir, which is consumed in star-formation, through accretion of gas from their circumgalactic mediums (CGMs). However, there are few observational constraints today on the gas accr
Externí odkaz:
http://arxiv.org/abs/2309.05937
Publikováno v:
The Astrophysical Journal Letters, 2023, 950, L18
The atomic hydrogen (HI) properties of star-forming galaxies in the local Universe are known to correlate with other galaxy properties via the ``HI scaling relations''. The redshift evolution of these relations serves as an important constraint on mo
Externí odkaz:
http://arxiv.org/abs/2305.01389
The neutral atomic hydrogen (HI) mass function (HIMF) describes the distribution of the HI content of galaxies at any epoch; its evolution provides an important probe of models of galaxy formation and evolution. Here, we report Giant Metrewave Radio
Externí odkaz:
http://arxiv.org/abs/2210.17018
We present a comparison between the average atomic gas mass, $\langle M_{Atom}\rangle$ (including HI and He), the average molecular gas mass, $\langle M_{Mol}\rangle$, and the average stellar mass, $\langle M_*\rangle$, of a sample of star-forming ga
Externí odkaz:
http://arxiv.org/abs/2207.08834
Publikováno v:
The Astrophysical Journal (2022) 937, 103
We describe the design, data analysis, and basic results of the Giant Metrewave Radio Telescope Cold-HI AT $z\approx1$ (GMRT-CAT$z$1) survey, a 510-hour upgraded GMRT HI 21 cm emission survey of galaxies at $z=0.74-1.45$ in the DEEP2 survey fields. T
Externí odkaz:
http://arxiv.org/abs/2207.00031
Publikováno v:
ApJL 931 L34 2022
Measurements of the atomic hydrogen (HI) properties of high-redshift galaxies are critical to understanding the decline in the star-formation rate (SFR) density of the Universe after its peak $\approx8-11$ Gyr ago. Here, we use $\approx510$ hours of
Externí odkaz:
http://arxiv.org/abs/2205.15334
We study the relationship between the H{\sc i} specific angular momentum (j$_{\rm g}$) and the H{\sc i} mass (M$_{\rm g}$) for a sample of galaxies with well measured H{\sc i} rotation curves. We find that the relation is well described by an unbroke
Externí odkaz:
http://arxiv.org/abs/2107.13630