Search Publications
Testing kinematic distances under a realistic Galactic potential: Investigating systematic errors in the kinematic distance method arising from a non-axisymmetric potential
Glover, Simon C. O.; Klessen, Ralf S.; Vasiliev, Eugene +15 more
Context. Obtaining reliable distance estimates to gas clouds within the Milky Way is challenging in the absence of certain tracers. The kinematic distance approach has been used as an alternative, and it is derived from the assumption of circular trajectories around the Galactic centre. Consequently, significant errors are expected in regions wher…
Keck and Hubble Observations Show that MOA-2008-BLG-379Lb is a Super-Jupiter Orbiting an M Dwarf
Lu, Jessica R.; Beaulieu, Jean-Philippe; Bond, Ian A. +11 more
We present high angular resolution imaging that detects the MOA-2008-BLG-379L exoplanet host star using Keck adaptive optics and the Hubble Space Telescope. These observations reveal host star and planet masses of M host = 0.434 ± 0.065 M ⊙ and m p = 2.44 ± 0.49 M Jupiter. They are located at a distanc…
Noema formIng Cluster survEy (NICE): Discovery of a starbursting galaxy group with a radio-luminous core at z = 3.95
Finoguenov, A.; Magnelli, B.; Daddi, E. +34 more
The study of distant galaxy groups and clusters at the peak epoch of star formation is limited by the lack of a statistically and homogeneously selected and spectroscopically confirmed sample. Recent discoveries of concentrated starburst activities in cluster cores have opened a new window to hunt for these structures based on their integrated IR …
Using Solar Orbiter as an Upstream Solar Wind Monitor for Real Time Space Weather Predictions
Möstl, C.; Davies, J. A.; Horbury, T. S. +11 more
Coronal mass ejections (CMEs) can create significant disruption to human activities and systems on Earth, much of which can be mitigated with prior warning of the upstream solar wind conditions. However, it is currently extremely challenging to accurately predict the arrival time and internal structure of a CME from coronagraph images alone. In th…
X-Shooting ULLYSES: Massive stars at low metallicity: VII. Stellar and wind properties of B supergiants in the Small Magellanic Cloud
van Loon, J. Th.; Crowther, P. A.; Mehner, A. +22 more
Context. With the aim of understanding massive stars and their feedback in the early epochs of our Universe, the ULLYSES and XShootU collaborations collected the biggest homogeneous dataset of high-quality hot star spectra at low metallicity. Within the rich "zoo" of massive star stellar types, B supergiants (BSGs) represent an important connectio…
HPIC: The Habitable Worlds Observatory Preliminary Input Catalog
Tuchow, Noah W.; Stark, Christopher C.; Mamajek, Eric
The Habitable Worlds Observatory Preliminary Input Catalog (HPIC) is a list of ∼13,000 nearby bright stars that will be potential targets for the Habitable Worlds Observatory (HWO) in its search for Earth-sized planets around Sun-like stars. We construct this target list using the TESS and Gaia DR3 catalogs and develop an automated pipeline to com…
Circumstellar Interaction in the Ultraviolet Spectra of SN 2023ixf 14–66 Days After Explosion
Filippenko, Alexei V.; Smith, Nathan; Sand, David J. +20 more
SN 2023ixf was discovered in M101 within a day of the explosion and rapidly classified as a Type II supernova with flash features. Here we present ultraviolet (UV) spectra obtained with the Hubble Space Telescope 14, 19, 24, and 66 days after the explosion. Interaction between the supernova ejecta and circumstellar material (CSM) is seen in the UV…
How open is the asteroid-mass primordial black hole window?
Green, Anne; Gorton, Matthew
Primordial black holes (PBHs) can make up all of the dark matter (DM) if their mass, mm, is in the so-called "asteroid-mass window", 10^{17} g ≲ m ≲ 10^{22} g1017g≲m≲1022g. Observational constraints on the abundance of PBHs are usually calculated assuming they all have the same mass, however this is unlikely to be a good approximation. PBHs formed…
Widespread AGN feedback in a forming brightest cluster galaxy at z = 4.1, unveiled by JWST
Pentericci, Laura; Cameron, Alex J.; Bosman, Sarah E. I. +16 more
We present rest-frame optical JWST Near-infrared Spectrograph (NIRSpec) integral field unit (IFU) spectroscopy of TN J1338-1942 at z = 4.1, one of the most luminous galaxies in the early universe with powerful extended radio jets. Previous observations showed evidence for strong, large-scale outflows based on its large (~150 kpc) halo detected in …
JWST Near-infrared Spectroscopy of the Lucy Jupiter Trojan Flyby Targets: Evidence for OH Absorption, Aliphatic Organics, and CO2
Noll, Keith S.; Grundy, William M.; Brown, Michael E. +6 more
We present observations obtained with the Near Infrared Spectrograph on JWST of the five Jupiter Trojans that will be visited by the Lucy spacecraft—the Patroclus–Menoetius binary, Eurybates, Orus, Leucus, and Polymele. The measured 1.7–5.3 µm reflectance spectra, which provide increased wavelength coverage, spatial resolution, and signal-to…