405 citations · 1.7k across the 33 of their papers we have counts for
34 papers
The Peculiar Velocity of Messier~87 from Microarcsecond Geodetic VLBI Astrometry
Valeri V. Makarov, Phil Cigan, Kyle Corcoran
Our knowledge of the space velocity of Messier 87, which is the dominant galaxy in the Virgo cluster, has been limited to the radial velocity component. Using a cadence of precisio…
Stellar Populations and Molecular Gas Composition in the Low-Metallicity Environment of WLM
Haylee N. Archer, Deidre A. Hunter, Bruce G. Elmegreen +8
We investigate the stellar populations and molecular gas properties of a star-forming region within the dwarf irregular (dIrr) galaxy WLM. Low-metallicity dIrrs like WLM offer a va…
VLA FRAMEx. II. Radio Spectra of Nearby Active Galactic Nuclei at Subarcsecond Resolution
Andrew J. Sargent, Alexander J. van der Horst, Megan C. Johnson +5
We present GHz in-band spectral energy distributions with accompanying 6 GHz and 10 GHz imaging results for a volume-complete sample ( Mpc) of hard X-ray selected activ…
Partial Alignment of Astrometric Position Excursions of International Celestial Reference Frame Quasars with Radio Jet Structures
Valeri V. Makarov, Phil Cigan, David Gordon +3
Published analyses of very long baseline interferometry (VLBI) data for the sources included in the third International Celestial Reference Frame (ICRF3) catalog have revealed obje…
Metrics of Astrometric Variability in the International Celestial Reference Frame: I. Statistical analysis and selection of the most variable sources
Phil Cigan, Valeri Makarov, Nathan Secrest +3
Using very long baseline interferometry data for the sources that comprise the third International Celestial Reference Frame (ICRF3), we examine the quality of the formal source po…
Robust 1-norm periodograms for analysis of noisy non-Gaussian time series with irregular cadences: Application to VLBI astrometry of quasars
Valeri V. Makarov, Sébastien Lambert, Phil Cigan +2
Astronomical time series often have non-uniform sampling in time, or irregular cadences, with long gaps separating clusters of observations. Some of these data sets are also explic…
Probing the relationship between early star formation and CO in the dwarf irregular galaxy WLM with JWST
Haylee N. Archer, Deidre A. Hunter, Bruce G. Elmegreen +5
Wolf-Lundmark-Melotte (WLM) is a Local Group dwarf irregular (dIrr) galaxy with a metallicity 13% of solar. At 1 Mpc, the relative isolation of WLM provides a unique opportunity to…
FRAMEx. V. Radio Spectral Shape at Central Sub-parsec Region of AGNs
Onic I. Shuvo, Megan C. Johnson, Nathan J. Secrest +4
We present results from the Very Long Baseline Array (VLBA) multi-frequency (1.6, 4.4, 8.6, 22 GHz), high-sensitivity (~25 microJy beam^-1), sub-parsec scale (<1 pc) observations a…
VLA FRAMEx. I. Wideband Radio Properties of the AGN in NGC 4388
Andrew J. Sargent, Travis C. Fischer, Megan C. Johnson +5
We present the first results from Karl G. Jansky Very Large Array (VLA) observations as a part of the Fundamental Reference Active Galactic Nucleus (AGN) Monitoring Experiment (FRA…
JWST NIRCam Observations of SN 1987A: Spitzer Comparison and Spectral Decomposition
Richard G. Arendt, Martha L. Boyer, Eli Dwek +24
JWST NIRCam observations at 1.5-4.5 m have provided broad and narrow band imaging of the evolving remnant of SN 1987A with unparalleled sensitivity and spatial resolution. Compa…
Fundamental Reference AGN Monitoring Experiment (FRAMEx) III: Radio Emission in the Immediate Vicinity of Radio Quiet AGNs
Onic I. Shuvo, Megan C. Johnson, Nathan J. Secrest +5
We present follow-up results from the first Fundamental Reference AGN Monitoring Experiment (FRAMEx) X-ray/radio snapshot program of a volume-complete sample of local hard X-ray-se…
Wandering Black Hole Candidates in Dwarf Galaxies at VLBI Resolution
Andrew J. Sargent, Megan C. Johnson, Amy E. Reines +5
Thirteen dwarf galaxies have recently been found to host radio-selected accreting massive black hole (MBH) candidates, some of which are ``wandering" in the outskirts of their host…
The Environments of CO Cores and Star Formation in the Dwarf Irregular Galaxy WLM
Haylee N. Archer, Deidre A. Hunter, Bruce G. Elmegreen +5
The low metallicities of dwarf irregular galaxies (dIrr) greatly influence the formation and structure of molecular clouds. These clouds, which consist primarily of H, are typi…
FRAMEx II: Simultaneous X-ray and Radio Variability in Active Galactic Nuclei The Case of NGC 2992
Luis C. Fernandez, Nathan J. Secrest, Megan C. Johnson +4
Using simultaneous Very Long Baseline Array and Neil Gehrels Swift Observatory X-ray Telescope observations of the active galactic nucleus (AGN) in NGC 2992 over a six-month observ…
Imaging Sources in the Third Realization of the International Celestial Reference Frame
Lucas R. Hunt, Megan C. Johnson, Phillip J. Cigan +2
The third iteration of the International Celestial Reference Frame (ICRF3) is made up of 4536 quasars observed at S/X bands using Very Long baseline Interferometry (VLBI). These so…
Photometric Observations of Dwarf Galaxies
Phil Cigan, Lisa M. Young, Haley L. Gomez +5
We present here far-infrared photometry of galaxies in a sample that is relatively unexplored at these wavelengths: low-metallicity dwarf galaxies with moderate star formation rate…
AlFoCS + F3D II: unexpectedly low gas-to-dust ratios in the Fornax galaxy cluster
Nikki Zabel, Timothy A. Davis, Matthew W. L. Smith +14
We combine observations from ALMA, ATCA, MUSE, andHerschel to study gas-to-dust ratios in 15 Fornax cluster galaxies detected in the FIR/sub-mm by Herschel and observed by ALMA as…
A Search for correlations between turbulence and star formation in LITTLE THINGS dwarf irregular galaxies
Deidre A. Hunter, Bruce G. Elmegreen, Haylee Archer +2
Turbulence has the potential for creating gas density enhancements that initiate cloud and star formation (SF), and it can be generated locally by SF. To study the connection betwe…
Fundamental Reference AGN Monitoring Experiment (FRAMEx) I: Jumping Out of the Plane with the VLBA
Travis C. Fischer, Nathan J. Secrest, Megan C. Johnson +7
We present the first results from the Fundamental Reference AGN Monitoring Experiment (FRAMEx), an observational campaign dedicated to understanding the physical processes that aff…
JINGLE -- IV. Dust, HI gas and metal scaling laws in the local Universe
I. De Looze, I. Lamperti, A. Saintonge +29
Scaling laws of dust, HI gas and metal mass with stellar mass, specific star formation rate and metallicity are crucial to our understanding of the buildup of galaxies through thei…
A Complete Catalogue of Dusty Supernova Remnants
Hannah Chawner, Haley Gomez, Mikako Matsuura +9
We search for far-infrared (FIR) counterparts of known supernova remnants (SNRs) in the Galactic plane (360 degrees in longitude and b = +/- 1 deg ) at 70 - 500 micron with Hersche…
High angular resolution ALMA images of dust and molecules in the SN 1987A ejecta
Phil Cigan, Mikako Matsuura, Haley L. Gomez +23
We present high angular resolution (~80 mas) ALMA continuum images of the SN 1987A system, together with CO =2 1, =6 5, and SiO =5 $\!\…
The Dust in M31
Ant Whitworth, Ken Marsh, Phil Cigan +6
We have analysed Herschel observations of M31, using the PPMAP procedure. The resolution of PPMAP images is sufficient (31 pc on M31) that we can analyse far-IR dust emission on th…
JINGLE, a JCMT legacy survey of dust and gas for galaxy evolution studies: II. SCUBA-2 850 μm data reduction and dust flux density catalogues
Matthew W. L. Smith, Christopher J. R. Clark, Ilse De Looze +33
We present the SCUBA-2 850 component of JINGLE, the new JCMT large survey for dust and gas in nearby galaxies, which with 193 galaxies is the largest targeted survey of nearby…