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A blind HI Mass Function from the Arecibo Ultra-Deep Survey (AUDS)
Laura Hoppmann,Lister Staveley-Smith,Wolfram Freudling,Martin Zwaan,Robert F. Minchin,M. R. Calabretta +5 more
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In this article, the authors present data from 60% of the total AUDS data set, corresponding to a sensitivity level of 80 micro-Jy, and discuss the data reduction, the search for galaxies, parametrisation, optical identification and completeness.Abstract:
The Arecibo Ultra Deep Survey (AUDS) combines the unique sensitivity of the telescope with the wide field of the Arecibo L-band Feed Array (ALFA) to directly detect 21cm HI emission from galaxies at distances beyond the local Universe bounded by the lower frequency limit of ALFA (z=0.16). AUDS has collected 700 hours of integration time in two fields with a combined area of 1.35 square degrees. In this paper we present data from 60% of the total survey, corresponding to a sensitivity level of 80 micro-Jy. We discuss the data reduction, the search for galaxies, parametrisation, optical identification and completeness. We detect 102 galaxies in the mass range of log M_HI/M_sun-2log h=5.6-10.3. We compute the HI mass function (HIMF) at the highest redshifts so far measured. A fit of a Schechter function results in alpha=-1.37+-0.03, Phi=(7.72+-1.4)*10^3 h^3/Mpc^3 and log M_HI/M_sun=9.75+-0.041+2log h. Using the measured HIMF, we find a cosmic HI density of Omega_HI=(2.33+-0.07)*10^-4/h for the sample z=0.065. We discuss further uncertainties arising from cosmic variance. Because of its depth, AUDS is the first survey that can determine parameters for the HI mass function in independent redshift bins from a single homogeneous data set. The results indicate little evolution of the co-moving mass function and Omega_HI within this redshift range. We calculate a weighted average for Omega_HI in the range $0<z<0.2$, combining the results from AUDS as well as results from other 21cm surveys and stacking, finding a best combined estimate of Omega_HI=(2.63+-0.10)*10-4/h.read more
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Journal ArticleDOI
The ALFALFA H i mass function: a dichotomy in the low-mass slope and a locally suppressed ‘knee’ mass
TL;DR: The ALFALFA team at Cornell is supported by NSF grants AST-0607007, AST-1107390 and AST-1714828, and by grants from the Brinson Foundation MGJ also acknowledges support from the grant AYA2015-65973-C3-1-R (MINECO/FEDER, UE) We also acknowledge helpful comments from A Robotham concerning the satellite and central MFs as discussed by the authors.
Journal ArticleDOI
WALLABY -- An SKA Pathfinder HI Survey
B. S. Koribalski,Lister Staveley-Smith,Tobias Westmeier,Paolo Serra,Kristine Spekkens,O. I. Wong,Claudia del P. Lagos,Danail Obreschkow,Emma V. Ryan-Weber,Martin Zwaan,Virginia A. Kilborn,Georgios Bekiaris,Kenji Bekki,Frank Bigiel,Alessandro Boselli,Albert Bosma,Barbara Catinella,Garima Chauhan,M. E. Cluver,Matthew Colless,Hélène M. Courtois,Robert A. Crain,W. J. G. de Blok,H. Dénes,Alan R. Duffy,A. Elagali,Christopher J. Fluke,Bi-Qing For,George Heald,P. A. Henning,Kelley M. Hess,Benne W. Holwerda,Cullan Howlett,Thomas H. Jarrett,David Heath Jones,Michael G. Jones,Gyula I. G. Józsa,Russell J. Jurek,E. Jütte,P. Kamphuis,I. D. Karachentsev,J. Kerp,D. Keiner,Renee C. Kraan-Korteweg,K. Lee-Waddell,Angel R. Lopez-Sanchez,J. P. Madrid,Martin Meyer,Jeremy Mould,C. Murugeshan,Ray P. Norris,S. H. Oh,Tom Oosterloo,Attila Popping,Mary E. Putman,T. N. Reynolds,J. Rhee,Aaron S. G. Robotham,Stuart D. Ryder,Anke Schröder,Li Shao,Adam R. H. Stevens,Edward N. Taylor,J. M. van der Hulst,Lourdes Verdes-Montenegro,Bart P. Wakker,Jiali Wang,Matthew Whiting,Benjamin Winkel,Christian Wolf +69 more
TL;DR: The Widefield ASKAP L-band Legacy All-sky Blind Survey (WALLABY) as mentioned in this paper is a next-generation survey of neutral hydrogen (HI) in the Local Universe, which uses the widefield, high-resolution capability of the Australian Square Kilometer Array Pathfinder (ASKAP), a radio interferometer consisting of 36 x 12m dishes equipped with Phased-Array Feeds.
Journal ArticleDOI
Atomic and molecular gas in IllustrisTNG galaxies at low redshift
Benedikt Diemer,Adam R. H. Stevens,Claudia del P. Lagos,Claudia del P. Lagos,A. R. Calette,Sandro Tacchella,Lars Hernquist,Federico Marinacci,Federico Marinacci,Dylan Nelson,Annalisa Pillepich,Vicente Rodriguez-Gomez,Francisco Villaescusa-Navarro,Mark Vogelsberger +13 more
TL;DR: In this article, the authors compare the abundance of atomic and molecular hydrogen (HI and H2) in galaxies in large-volume cosmological simulations to observations and find generally good agreement between simulations and observations, particularly for the gas fractions and the HI mass-size relation.
Journal ArticleDOI
Giant Metrewave Radio Telescope observations of neutral atomic hydrogen gas in the COSMOS field at z ∼ 0.37
TL;DR: In this article, the authors present the results of HI spectral stacking analysis of giant metrewave radio telescope (GMRT) observations targeting the COSMOS field and find a cosmic HI mass density of (0.42 $\pm$ 0.37$ ).
Journal ArticleDOI
Cosmological forecasts for combined and next-generation peculiar velocity surveys
TL;DR: In this article, a Fisher matrix formalism was used to investigate the statistical benefits of combining multiple peculiar velocity surveys, and it was shown that neglecting velocity bias has the potential to bias constraints on the growth rate by over 5 sigma, but that an offset in the zero-point has negligible impact on the velocity power spectrum.
References
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The Arecibo Legacy Fast ALFA Survey: I. Science Goals, Survey Design and Strategy
TL;DR: The recently initiated Arecibo Legacy Fast ALFA (ALFALFA) survey as mentioned in this paper is designed to map 7000 square degrees of the high galactic latitude sky visible from the AreCibo, providing a HI line spectral database covering the redshift range between -1600 km/s and 18,000 km/S with 5 km/σ resolution, which is especially useful in synergy with wide area surveys conducted at other wavelengths.
Journal ArticleDOI
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TL;DR: The α.40 catalog of 21 cm H I line sources extracted from the Arecibo Legacy Fast arecibo L-band Feed Array (ALFALFA) survey over ~2800 deg^2 of sky is presented in this article.
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