Using H <sc>i</sc> observations of low-mass galaxies to test ultralight axion dark matter

被引：0
作者：
Garland, James T. [1 ]
Masters, Karen L. [2 ,3 ]
Grin, Daniel [2 ,3 ]
机构：
[1] Univ Toronto, David A Dunlap Dept Astron & Astrophys, 50 St George St, Toronto, ON M5S 3H4, Canada
[2] Haverford Coll, Dept Phys, 370 Lancaster Ave, Haverford, PA 19041 USA
[3] Haverford Coll, Dept Astron, 370 Lancaster Ave, Haverford, PA 19041 USA
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2024年 / 535卷 / 02期
关键词：
galaxies: haloes; galaxies: statistics; dark matter; cosmology: observations; radio lines: galaxies; FAST ALPHA SURVEY; VELOCITY WIDTH FUNCTION; HALO MASS; I MASS; LIGHT; COLD; FLUCTUATIONS; SUBSTRUCTURE; OSCILLATIONS; CONSTRAINTS;
D O I：
10.1093/mnras/stae2370
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We evaluate recent and upcoming low-redshift neutral hydrogen (H I ) surveys as a cosmological probe of small scale structure with a goal of determining the survey criteria necessary to test ultralight axion (ULA) dark matter models. Standard cold dark matter (CDM) models predict a large population of low-mass galactic haloes, whereas ULA models demonstrate significant suppression in this small-scale regime, with halo mass cutoffs of 10(12) M-(R) to 10(7) M((R) )corresponding to ULA masses of 10(-24) to 10(-20) eV, respectively, if ULAs compose all of the dark matter. We generate random, homogeneously populated mock universes with cosmological parameters adjusted to match CDM and ULA models. We simulate observations of these mock universes with hypothetical analogues of the mass-limited ALFALFA and WALLABY HI surveys and reconstruct the corresponding HI mass function (HIMF). We find that the ALFALFA HIMF can test for the presence of ULA DM with m(a) less than or similar to 10(-21.5) eV , while WALLABY could reach the larger window m(a) less than or similar to 10(-20.9) eV . These constraints are complementary to other probes of ULA dark matter, demonstrating the utility of local Universe HI surveys in testing dark matter models.
引用
收藏
页码：1338 / 1347
页数：10
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