TY - JOUR
T1 - Relationships between HI Gas Mass, Stellar Mass, and the Star Formation Rate of HICAT+WISE (H I-WISE) Galaxies
AU - Parkash, Vaishali
AU - Brown, Michael J.I.
AU - Jarrett, T. H.
AU - Bonne, Nicolas J.
PY - 2018/9/1
Y1 - 2018/9/1
N2 - We have measured the relationships between H i mass, stellar mass, and star formation rate using the Hi Parkes All-Sky Survey Catalog (HICAT) and the Wide-field Infrared Survey Explorer (WISE). Of the 3513 HICAT sources, we find 3.4 μm counterparts for 2896 sources (80%), and provide new WISE-matched aperture photometry for these galaxies. For our principal sample of spiral galaxies with W1 ≤ 10 mag and z ≤ 0.01, we identify H i detections for 93% of the sample. We measure lower H i-stellar mass relationships for H i-selected samples that do not include spiral galaxies with little H i gas. Our observations of the spiral sample show that H i mass increases with stellar mass with a power-law index of 0.35; however, this value is dependent on T-type, which affects both the median and the dispersion of Hi mass. We also observe an upper limit on the H i gas fraction, which is consistent with a halo spin parameter model. We measure the star formation efficiency of spiral galaxies to be constant at 10-9.57 yr-1 ±0.4 dex for 2.5 orders of magnitude in stellar mass, despite the higher stellar mass spiral showing evidence of quenched star formation.
AB - We have measured the relationships between H i mass, stellar mass, and star formation rate using the Hi Parkes All-Sky Survey Catalog (HICAT) and the Wide-field Infrared Survey Explorer (WISE). Of the 3513 HICAT sources, we find 3.4 μm counterparts for 2896 sources (80%), and provide new WISE-matched aperture photometry for these galaxies. For our principal sample of spiral galaxies with W1 ≤ 10 mag and z ≤ 0.01, we identify H i detections for 93% of the sample. We measure lower H i-stellar mass relationships for H i-selected samples that do not include spiral galaxies with little H i gas. Our observations of the spiral sample show that H i mass increases with stellar mass with a power-law index of 0.35; however, this value is dependent on T-type, which affects both the median and the dispersion of Hi mass. We also observe an upper limit on the H i gas fraction, which is consistent with a halo spin parameter model. We measure the star formation efficiency of spiral galaxies to be constant at 10-9.57 yr-1 ±0.4 dex for 2.5 orders of magnitude in stellar mass, despite the higher stellar mass spiral showing evidence of quenched star formation.
KW - galaxies: evolution
KW - galaxies: fundamental parameters
KW - galaxies: spiral
KW - galaxies: star formation
KW - radio lines: galaxies
KW - radio lines: ISM
UR - http://www.scopus.com/inward/record.url?scp=85053143916&partnerID=8YFLogxK
U2 - 10.3847/1538-4357/aad3b9
DO - 10.3847/1538-4357/aad3b9
M3 - Article
AN - SCOPUS:85053143916
SN - 0004-637X
VL - 864
JO - The Astrophysical Journal
JF - The Astrophysical Journal
IS - 1
M1 - 40
ER -