The H I mass function and velocity width function of void galaxies in the Arecibo Legacy Fast ALFA Survey
文献类型：期刊论文
| 作者 | Moorman, Crystal M.1; Vogeley, Michael S.1; Hoyle, Fiona2; Pan, Danny C.3; Haynes, Martha P.4; Giovanelli, Riccardo4 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2014-11-11 |
| 卷号 | 444期号:4页码:3559-3570 |
| 关键词 | methods: statistical galaxies: distances and redshifts galaxies: luminosity function cosmology: observations large-scale structure of Universe radio lines: galaxies mass function |
| 通讯作者 | 郝蕾 |
| 英文摘要 | We measure the HI mass function (HIMF) and velocity width function (WF) across environments over a range of masses, 7.2 < log (M-HI/M-circle dot) < 10.8, and profile widths, 1.3 log (km s(-1)) < log (W) < 2.9 log (km s(-1)), using a catalogue of similar to 7300 HI-selected galaxies from the Arecibo Legacy Fast ALFA (ALFALFA) Survey, located in the region of sky where ALFALFA and Sloan Digital Sky Survey (Data Release 7) North overlap. We divide our galaxy sample into those that reside in large-scale voids (void galaxies) and those that live in denser regions (wall galaxies). We find the void HIMF to be well fitted by a Schechter function with normalization Phi* = (1.37 +/- 0.1) x 10(-2) y h(3) Mpc(-3), characteristic mass log(M-HI*/M-circle dot) + 2 log h(70) = 9.86 +/- 0.02, and low-mass-end slope alpha = -1.29 +/- 0.02. Similarly, for wall galaxies, we find best-fitting parameters Phi* = (1.82 +/- 0.03) x 10(-2) h(3) Mpc(-3), log(M-H I*/M-circle dot) + 2 log h(70) = 10.00 +/- 0.01, and alpha = -1.35 +/- 0.01. We conclude that void galaxies typically have slightly lower HI masses than their non-void counterparts, which is in agreement with the dark matter (DM) halo mass function shift in voids assuming a simple relationship between DM mass and HI mass. We also find that the low-mass slope of the void HIMF is similar to that of the wall HIMF suggesting that there is either no excess of low-mass galaxies in voids or there is an abundance of intermediate HI mass galaxies. We fit a modified Schechter function to the ALFALFA void WF and determine its best-fitting parameters to be Phi* = 0.21 +/- 0.1 h(3) Mpc(-3), log (W*) = 2.13 +/- 0.3, alpha = 0.52 +/- 0.5, and high-width slope beta = 1.3 +/- 0.4. For wall galaxies, the WF parameters are Phi* = 0.022 +/- 0.009 h(3) Mpc(-3), log (W*)= 2.62 +/- 0.5, alpha= -0.64 +/- 0.2, and beta = 3.58 +/- 1.5. Because of large uncertainties on the void and wall WFs, we cannot conclude whether the WF is dependent on the environment. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | DIGITAL SKY SURVEY ; 40-PERCENT ALFALFA SURVEY ; LARGE-SCALE STRUCTURE ; VIRGO CLUSTER REGION ; DATA RELEASE 7 ; LUMINOSITY FUNCTION ; REDSHIFT SURVEY ; SOURCE CATALOG ; FIELD GALAXIES ; PHOTOMETRIC PROPERTIES |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000343400100039 |
| 公开日期 | 2015-02-14 |
| 源URL | [http://119.78.226.72//handle/331011/15748]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Drexel Univ, Dept Phys, Philadelphia, PA 19104 USA 2.Pontifica Univ Catolica Ecuador, Quito, Ecuador 3.Shanghai Astron Observ, Shanghai 200030, Peoples R China 4.Cornell Univ, Ctr Radiophys & Space Res, Ithaca, NY 14853 USA |
| 推荐引用方式 GB/T 7714 | Moorman, Crystal M.,Vogeley, Michael S.,Hoyle, Fiona,et al. The H I mass function and velocity width function of void galaxies in the Arecibo Legacy Fast ALFA Survey[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2014,444(4):3559-3570. |
| APA | Moorman, Crystal M.,Vogeley, Michael S.,Hoyle, Fiona,Pan, Danny C.,Haynes, Martha P.,&Giovanelli, Riccardo.(2014).The H I mass function and velocity width function of void galaxies in the Arecibo Legacy Fast ALFA Survey.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,444(4),3559-3570. |
| MLA | Moorman, Crystal M.,et al."The H I mass function and velocity width function of void galaxies in the Arecibo Legacy Fast ALFA Survey".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 444.4(2014):3559-3570. |
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来源：上海天文台
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