The HI mass function in the Parkes HI Zone of Avoidance survey
| dc.contributor.author | Said, Khaled | |
| dc.contributor.author | Kraan-Korteweg, Renee Christine | |
| dc.contributor.author | Staveley-Smith, Lister | |
| dc.date.accessioned | 2020-10-26T03:21:47Z | |
| dc.date.available | 2020-10-26T03:21:47Z | |
| dc.date.issued | 2019 | |
| dc.date.updated | 2020-07-06T08:21:27Z | |
| dc.description.abstract | An H I mass function (HIMF) was derived for 751 galaxies selected from the deep Parkes H I survey across the Zone of Avoidance (HIZOA). HIZOA contains both the Great Attractor Wall and the Local Void, two of the most extreme environments in the local Universe, making the sample eminently suitable to explore the overall HIMF as well as its dependence on local environment. To avoid any selection bias because of the different distances of these large-scale structures, we first used the 2D stepwise maximum-likelihood method for the definition of an average HIMF. The resulting parameters of a Schechter-type HIMF for the whole sample are α = −1.33 ± 0.05, log(M∗ H I /M) = 9.93 ± 0.04, and φ∗ = (3.9 ± 0.6) × 10−3 Mpc−3. We then used the k-th nearest-neighbour method to subdivide the sample into four environments of decreasing local density and derived the Schechter parameters for each subsample. A strong trend is observed, for the slope α of the low-mass end of the HIMF. The slope changes from being nearly flat, i.e. α = −0.99 ± 0.19 for galaxies residing in the densest bin, to the steep value of α = −1.31 ± 0.10 in the lowest density bin. The characteristic mass, however, does not show a clear trend between the highest and lowest density bins. We find similar trends in the low-mass slope when we compare the results for a region dominated by the Great Attractor, and the Local Void, which are found to be over-, respectively underdense by 1.35 and 0.59 compared to the whole sample. | en_AU |
| dc.format.mimetype | application/pdf | en_AU |
| dc.identifier.issn | 0035-8711 | en_AU |
| dc.identifier.uri | http://hdl.handle.net/1885/213064 | |
| dc.language.iso | en_AU | en_AU |
| dc.provenance | https://v2.sherpa.ac.uk/id/publication/24618..."The Published Version can be archived in an Institutional Repository" from SHERPA/RoMEO site (as at 26/10/2020). This is a pre-copyedited, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The version of record [Said, Khaled, Renée C. Kraan-Korteweg, and Lister Staveley-Smith. "The H i mass function in the Parkes H i Zone of Avoidance survey." Monthly Notices of the Royal Astronomical Society 486.2 (2019): 1796-1804.] is available online at:https://dx.doi.org/10.1093/mnras/stz956 | en_AU |
| dc.publisher | Royal Astronomical Society | en_AU |
| dc.rights | © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society | en_AU |
| dc.source | Monthly Notices of the Royal Astronomical Society | en_AU |
| dc.subject | galaxies: distances and redshifts | en_AU |
| dc.subject | large-scale structure of Universe | en_AU |
| dc.subject | cosmology: observations | en_AU |
| dc.title | The HI mass function in the Parkes HI Zone of Avoidance survey | en_AU |
| dc.type | Journal article | en_AU |
| dcterms.accessRights | Open Access | en_AU |
| local.bibliographicCitation.issue | 2 | en_AU |
| local.bibliographicCitation.lastpage | 1804 | en_AU |
| local.bibliographicCitation.startpage | 1796 | en_AU |
| local.contributor.affiliation | Soliman, Khaled, College of Science, ANU | en_AU |
| local.contributor.affiliation | Kraan-Korteweg, Renee Christine, University of Cape Town | en_AU |
| local.contributor.affiliation | Staveley-Smith, Lister, University of Western Australia | en_AU |
| local.contributor.authoremail | u1048040@anu.edu.au | en_AU |
| local.contributor.authoruid | Said, Khaled, u1048040 | en_AU |
| local.description.notes | Imported from ARIES | en_AU |
| local.identifier.absfor | 020103 - Cosmology and Extragalactic Astronomy | en_AU |
| local.identifier.absfor | 020104 - Galactic Astronomy | en_AU |
| local.identifier.absseo | 970102 - Expanding Knowledge in the Physical Sciences | en_AU |
| local.identifier.ariespublication | u3102795xPUB3554 | en_AU |
| local.identifier.citationvolume | 486 | en_AU |
| local.identifier.doi | 10.1093/mnras/stz956 | en_AU |
| local.identifier.scopusID | 2-s2.0-85067988928 | |
| local.identifier.uidSubmittedBy | u3102795 | en_AU |
| local.publisher.url | http://mnras.oxfordjournals.org/ | en_AU |
| local.type.status | Published Version | en_AU |
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