104 citations · 697 across the 23 of their papers we have counts for
13 papers · 1 filter
The haloes and environments of nearby galaxies (HERON) -- III. A 45 kpc spiral structure in the GLSB galaxy UGC 4599
Aleksandr V. Mosenkov, R. Michael Rich, Michael Fusco +10
We use a 0.7-m telescope in the framework of the Halos and Environments of Nearby Galaxies (HERON) survey to probe low surface brightness structures in nearby galaxies. One of our…
Probing the Low-mass End of the Black Hole Mass Function via a Study of Faint Local Spiral Galaxies
Michael S. Fusco, Benjamin L. Davis, Julia Kennefick +2
We present an analysis of the pitch angle distribution function (PADF) for nearby galaxies and its resulting black hole mass function (BHMF) via the well-known relationship between…
Evidence in favour of density wave theory through star formation history maps and spatially resolved stellar clusters
Shameer Abdeen, Daniel Kennefick, Julia Kennefick +7
Stationary Density Wave Theory predicts the existence of an age gradient across the spiral arms with a phase crossing at the co-rotation radius. Using star formation history (SFH)…
Determining the Co-Rotation Radii of Spiral Galaxies Using Spiral Arm Pitch Angle Measurements at Multiple Wavelengths
Shameer Abdeen, Daniel Kennefick, Julia Kennefick +4
The spiral arms spanning disk galaxies are believed to be created by density waves that propagate through galactic disks. We present a novel method of finding the co-rotation radiu…
Investigating the Origins of Spiral Structure in Disk Galaxies through a Multiwavelength Study
Ryan Miller, Daniel Kennefick, Julia Kennefick +5
The density-wave theory of spiral structure proposes that star formation occurs in or near a spiral-shaped region of higher density that rotates rigidly within the galactic disk at…
The Halos and Environments of Nearby Galaxies (HERON) I: Imaging, Sample Characteristics, and Envelope Diameters
R. Michael Rich, Aleksandr Mosenkov, Henry Lee-Saunders +16
We use a dedicated 0.7-m telescope to image the halos of 119 galaxies in the Local Volume to mag/arcsec. The sample is primarily from the 2MASS Large Galaxy At…
The Halos and Environments of Nearby Galaxies (HERON) Survey
R. Michael Rich, Noah Brosch, James Bullock +7
We have used dedicated 0.7m telescopes in California and Israel to image the halos of ~200 galaxies in the Local Volume to 29 mag/sq arcsec, the sample mainly drawn from the 2MASS…
Strong Evidence for the Density-wave Theory of Spiral Structure in Disk Galaxies
Hamed Pour-Imani, Daniel Kennefick, Julia Kennefick +3
The density-wave theory of galactic spiral-arm structure makes a striking prediction that the pitch angle of spiral arms should vary with the wavelength of the galaxy's image. The…
Spirality: A Novel Way to Measure Spiral Arm Pitch Angle
Douglas W. Shields, Benjamin Boe, Casey Pfountz +6
We present the MATLAB code Spirality, a novel method for measuring spiral arm pitch angles by fitting galaxy images to spiral templates of known pitch. Computation time is typicall…
A Fundamental Plane of Spiral Structure in Disk Galaxies
Benjamin L. Davis, Daniel Kennefick, Julia Kennefick +7
Spiral structure is the most distinctive feature of disk galaxies and yet debate persists about which theory of spiral structure is the correct one. Many versions of the density wa…
The Black Hole Mass Function Derived from Local Spiral Galaxies
Benjamin L. Davis, Joel C. Berrier, Lucas Johns +6
We present our determination of the nuclear supermassive black hole (SMBH) mass function for spiral galaxies in the Local Universe, established from a volume-limited sample consist…
Further Evidence for a Supermassive Black Hole Mass - Pitch Angle Relation
Joel C. Berrier, Benjamin L. Davis, Daniel Kennefick +7
We present new and stronger evidence for a previously reported relationship between galactic spiral arm pitch angle P (a measure of the tightness of spiral structure) and the mass…
Measurement of Galactic Logarithmic Spiral Arm Pitch Angle Using Two-Dimensional Fast Fourier Transform Decomposition
Benjamin L. Davis, Joel C. Berrier, Douglas W. Shields +5
A logarithmic spiral is a prominent feature appearing in a majority of observed galaxies. This feature has long been associated with the traditional Hubble classification scheme, b…