Bibcode
Tremonti, C. A.; Pace, Zachary; Andrews, Brett; Law, David R.; Li, Cheng; Martinsson, T.; Masters, Karen; Stark, David; Sanchez, Sebastian; Storchi-Bergmann, Thaisa; MaNGA Team
Referencia bibliográfica
American Astronomical Society, AAS Meeting #227, id.#312.11
Advertised on:
1
2016
Número de citas
0
Número de citas referidas
0
Descripción
To understand galaxy evolution it is critical to obtain a census of both
the stellar and gaseous contents of galaxies. The SDSS-IV MaNGA survey
will deliver exquisite stellar mass maps of ~10,000 nearby galaxies.
However, radio surveys capable of providing matched resolution gas data
for a large fraction of the MaNGA sample are a decade or more away. We
are therefore exploring a new technique for obtaining maps of the total
gas content directly from the MaNGA data. Following the method outlined
in Brinchmann et al. 2013, we use the dust optical depth and the nebular
metallicity measured from optical emission lines to estimate the total
gas surface density in individual spaxels. We combine this with
estimates of the stellar mass in each spaxel to produce spatially
resolved estimates of the gas mass fraction. We compare trends in the
global gas mass fraction with stellar mass and NUV-r color to those
found in the literature. We explore how the radial gas mass fraction
gradients of MaNGA galaxies correlate with other properties such as
total stellar mass, specific star formation rate (SFR/M*),
concentration, and environment.