89 citations · 205 across the 13 of their papers we have counts for
14 papers
Separating the Optical to Near-Infrared Light of AGN and Their Host Galaxies
Callum Dewsnap, Pauline Barmby, Sarah C. Gallagher
The properties of galaxies that host active galactic nuclei (AGNs) offer clues to the conditions that enable accretion onto supermassive black holes. A galaxy's morphology can prov…
Classifying Quasar Types Without a Spectrum
Adrien Hélias, Pauline Barmby, Sarah C. Gallagher +2
Distinguishing between Type 1 and Type 2 quasars is important because it helps us understand accretion regimes, black hole mass scaling, disk instabilities and feedback processes i…
Investigating the AGN variability timescale -- black hole mass relationship with Gaia, SDSS and ZTF
Adrien Hélias, Sarah C. Gallagher, Pauline Barmby
Active galactic nuclei (AGNs) exhibit variability in their luminosities with timescales that correlate with the mass of the black hole at the centre of the AGN. Presently, the empi…
AGN--Host Galaxy Image Decomposition with JWST
Callum Dewsnap, Pauline Barmby, Sarah C. Gallagher
The ability to disentangle the light of an AGN from its host galaxy is strongly dependent on the spatial resolution and depth of the imaging. As the capabilities of imaging systems…
TONGS: A Treasury Of Nearby Galaxy Surveys
Hannah S. Christie, Adrien Hélias, Matheus do Carmo Carvalho +1
The beginning of the 21st century marked the "modern era of galaxy surveys" in astronomy. Rapid innovation in observing technology, combined with the base built by galaxy catalogs…
Comparing Gaia, NED and SIMBAD source classifications in nearby galaxies
J. Hales, P. Barmby
Gaia Data Release 3 (DR3) provides the first classifications for the sources in Gaia's all-sky database. Most Gaia sources are stars in the Milky Way, but DR3 also contains many so…
Deconstructing a galaxy: colour distributions of point sources in Messier 83
A. Kiar, P. Barmby, A. Hidalgo
What do we see when we look at a nearby, well-resolved galaxy? Thousands of individual sources are detected in multiband imaging observations of even a fraction of a nearby galaxy,…
M31 globular cluster structures and the presence of X-ray binaries
J. R. R. Agar, P. Barmby
[Abridged] M31 has several times more globular clusters (GCs) than the Milky Way. It contains a correspondingly larger number of low mass X-ray binaries (LMXBs) associated with GCs…
Multi-Wavelength Study of a Complete IRAC 3.6micron-Selected Galaxy Sample: a Fair Census of Red and Blue Populations at Redshifts 0.4-1
J. -S. Huang, S. M. Faber, C. N. A. Willmer +14
We present a multi-wavelength study of a 3.6 m-selected galaxy sample in the Extended Groth strip. The sample is complete for galaxies with stellar mass \Msun and re…
Stacking Star Clusters in M51: Searching for Faint X-Ray Binaries
N. Vulic, P. Barmby, S. C. Gallagher
The population of low-luminosity (< 10^35 erg/s) X-Ray Binaries (XRBs) has been investigated in our Galaxy and M31 but not further. To address this problem, we have used data from…
The JCMT Nearby Galaxies Legacy Survey VIII. CO data and the L(CO3-2)-L(FIR) correlation in the SINGS sample
C. D. Wilson, B. E. Warren, F. P. Israel +57
The James Clerk Maxwell Telescope Nearby Galaxies Legacy Survey (NGLS) comprises an HI-selected sample of 155 galaxies spanning all morphological types with distances less than 25…
Evidence for Pulsation-Driven Mass Loss from delta Cephei
M. Marengo, N. R. Evans, L. D. Matthews +7
We found the first direct evidence that the Cepheid class namesake, delta Cephei, is currently losing mass. These observations are based on data obtained with the Spitzer Space Tel…
Galactic Cepheids with Spitzer: II. Search for Extended Infrared Emission
P. Barmby, M. Marengo, N. R. Evans +5
A deep and detailed examination of 29 classical Cepheids with the Spitzer Space Telescope has revealed three stars with strong nearby extended emission detected in multiple bands w…
On the dust geometry in radio-loud active galactic nuclei
Hermine Landt, Catherine L. Buchanan, Pauline Barmby
We use photometric and spectroscopic infrared observations obtained with the Spitzer Space Telescope of 12 radio-loud active galactic nuclei (AGN) to investigate the dust geometry.…