Search Publications
KURVS: the outer rotation curve shapes and dark matter fractions of z 1.5 star-forming galaxies
Glazebrook, Karl; Obreschkow, Danail; Gillman, Steven +14 more
We present first results from the KMOS Ultra-deep Rotation Velocity Survey (KURVS), aimed at studying the outer rotation curves shape and dark matter content of 22 star-forming galaxies at z ~ 1.5. These galaxies represent 'typical' star-forming discs at z ~ 1.5, being located within the star-forming main sequence and stellar mass-size relation wi…
The Dark Energy Survey Year 3 high-redshift sample: selection, characterization, and analysis of galaxy clustering
Bechtol, K.; Smith, M.; Abbott, T. M. C. +98 more
The fiducial cosmological analyses of imaging surveys like DES typically probe the Universe at redshifts z < 1. We present the selection and characterization of high-redshift galaxy samples using DES Year 3 data, and the analysis of their galaxy clustering measurements. In particular, we use galaxies that are fainter than those used in the prev…
Deprojecting and constraining the vertical thickness of exoKuiper belts
Wyatt, Mark C.; Jennings, Jeff; Booth, Richard A. +3 more
Constraining the vertical and radial structure of debris discs is crucial to understanding their formation, evolution, and dynamics. To measure both the radial and vertical structure, a disc must be sufficiently inclined. However, if a disc is too close to edge-on, deprojecting its emission becomes non-trivial. In this paper we show how FRANKENSTE…
The path from the Chinese and Japanese observations of supernova 1181 AD, to a Type Iax supernova, to the merger of CO and ONe white dwarfs
Schaefer, Bradley E.
In 1181 AD, Chinese and Japanese observers reported an unmoving bright 'Guest Star' in the constellation Chuanshe, visible for 185 d. In 2013, D. Patchick discovered what turned out to be a unique nebula surrounding a unique star, with the structure named 'Pa 30', while subsequent workers made connections to mergers of white dwarfs, to the superno…
Asteroseismological analysis of the polluted ZZ Ceti star G 29 - 38 with TESS
Kepler, S. O.; Córsico, Alejandro H.; Bell, Keaton J. +15 more
G 29 - 38 (TIC 422526868) is one of the brightest (V = 13.1) and closest (d = 17.51 pc) pulsating white dwarfs with a hydrogen-rich atmosphere (DAV/ZZ Ceti class). It was observed by the TESS spacecraft in sectors 42 and 56. The atmosphere of G 29 - 38 is polluted by heavy elements that are expected to sink out of visible layers on short time-scal…
A trail of the invisible: blue globular clusters trace the radial density distribution of the dark matter - case study of NGC 4278
Forbes, Duncan A.; Dolfi, Arianna; Kluge, Matthias +2 more
We present new, deep optical observations of the early-type galaxy NGC 4278, which is located in a small loose group. We find that the galaxy lacks fine substructure, that is, it appears relaxed, out to a radius of ~70 kpc. Our g- and i-band surface brightness profiles are uniform down to our deepest levels of ~28 mag arcsec-2. This spa…
Spiral structure and massive star formation in the hub-filament-system G326.27-0.49
Güsten, Rolf; Wyrowski, F.; Veena, V. S. +2 more
Hub-filament systems (HFSs) are potential sites of formation of star clusters and high mass stars. To understand the HFSs and to provide observational constraints on current theories that attempt to explain star formation globally, we report a study of the region associated with G326.27-0.49 using infrared data of dust continuum and newly obtained…
The most luminous, merger-free AGNs show only marginal correlation with bar presence
Coil, Alison; Keel, William C.; Simmons, Brooke D. +13 more
The role of large-scale bars in the fuelling of active galactic nuclei (AGNs) is still debated, even as evidence mounts that black hole growth in the absence of galaxy mergers cumulatively dominates and may substantially influence disc (i.e. merger-free) galaxy evolution. We investigate whether large-scale galactic bars are a good candidate for me…
Recurring outbursts of the supernova impostor AT 2016blu in NGC 4559
Van Dyk, Schuyler D.; Filippenko, Alexei V.; Smith, Nathan +8 more
We present the first photometric analysis of the supernova (SN) impostor AT 2016blu in NGC 4559. This transient was discovered by the Lick Observatory Supernova Search in 2012 and has continued its outbursts since then. Optical and infrared photometry of AT 2016blu reveals at least 19 outbursts in 2012-2022. Similar photometry from 1999 to 2009 sh…
The evolution of the internal structure of massive star-forming regions in the Milky Way as revealed by ALMA
Dib, Sami
We analyse the structure of 15 protocluster forming regions in the Milky Way using their 1.3 mm continuum emission maps from the ALMA-IMF large program. The analysis of the cloud structure is performed using the delta-variance spectrum technique. The calculated spectra display a self-similar regime on small scales as well as the presence of a prom…