hiss, a new tool for H i stacking: application to NIBLES spectra
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- Department of Astronomy, University of Cape Town, Private Bag X3, Rondebosch 7701, South Africa, Kapteyn Astronomical Institute, University of Groningen, Landleven 12, NL-9747 AV Groningen, the Netherlands
- Department of Astronomy, University of Cape Town, Private Bag X3, Rondebosch 7701, South Africa
- Department of Astronomy, University of Cape Town, Private Bag X3, Rondebosch 7701, South Africa, Department of Physics and Astronomy, University of the Western Cape, Robert Sobukwe Road, Bellville 7535, South Africa
- GEPI, Observatoire de Paris, PSL Research University, CNRS, 5 place Jules Janssen, F-92190 Meudon, France, Station de Radioastronomie de Nançay, Observatoire de Paris, CNRS/INSU USR 704, Université d’Orléans OSUC, route de Souesmes, F-18330 Nançay, France
- Astronomy Program, University of Massachusetts, 619E LGRT-B, Amherst, MA 01003, USA
- CNRS UMR 7095, Institut d’Astrophysique de Paris, Sorbonne Université, 98bis bd Arago, F-75014 Paris, France
- Arecibo Observatory, National Astronomy and Ionosphere Center, Arecibo, PR 00612, USA, SOFIA-USRA, NASA Ames Research Center, MS 232-12, Moffett Field, CA 94035, USA
Abstract H i stacking has proven to be a highly effective tool to statistically analyse average H i properties for samples of galaxies which may or may not be directly detected. With the plethora of H i data expected from the various upcoming H i surveys with the SKA Precursor and Pathfinder telescopes, it will be helpful to standardize the way in which stacking analyses are conducted. In this work we present a new python-based package, hiss, designed to stack H i (emission and absorption) spectra in a consistent and reliable manner. As an example, we use hiss to study the H i content in various galaxy sub-samples from the NIBLES survey of SDSS galaxies which were selected to represent their entire range in total stellar mass without a prior colour selection. This allowed us to compare the galaxy colour to average H i content in both detected and non-detected galaxies. Our sample, with a stellar mass range of $$10^8 \lt {{ M}}_\star \, (\text{M}_\odot) \lt 10^{12}$$, has enabled us to probe the H i-to-stellar mass gas fraction relationship more than half an order of magnitude lower than in previous stacking studies.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 1529719
- Journal Information:
- Monthly Notices of the Royal Astronomical Society, Journal Name: Monthly Notices of the Royal Astronomical Society Vol. 487 Journal Issue: 4; ISSN 0035-8711
- Publisher:
- Oxford University PressCopyright Statement
- Country of Publication:
- United Kingdom
- Language:
- English
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