The MALIGN Survey: Masses And Luminosities of Infrared Galaxies Nearby
Christopher S. Kochanek,
Michael A. Pahre,
Emilio E. Falco,
John P. Huchra
For several decades, astronomers have studied the distribution of galaxy
luminosities--known as the luminosity function--both in the local universe
and at cosmological distances.
Galaxy evolutionary effects...
The MALIGN survey was constructed to measure the galaxy velocity and mass
functions in order to provide a more direct constraint on models of galaxy
and structure formation.
Observationally, this entails the following steps for the entire 4000+ galaxy
Then, for a small subsample of 500+ galaxies:
- Selecting the sample at a wavelength that best approximates a
selection by galaxy mass, i.e., using the near-infrared K-band (2.2 micron).
- Measuring redshifts for galaxies not in present-day catalogs.
- Visual morphological classification of the galaxies based on digitized
sky survey images.
Finally, we construct the following from the main and subsamples:
- Obtaining long-slit emission and absorption line spectra for each galaxy,
in order to measure the rotation curves and velocity dispersions, respectively,
as well as the line strengths.
- Measuring detailed surface brightness profiles, both at optical and
infrared wavelengths, in order to separate the disk and bulge light in each
- Measuring accurate optical and infrared colors of the galaxies in order
to estimate the age and metallicity of each galaxy component.
- The near-infrared K-band luminosity function of galaxies, both as a whole
and split by morphological type.
- The velocity and mass function of galaxies in the local universe.
for a bibliography of our work to date.