Search Publications
Precise Bolometric Luminosities and Effective Temperatures of 23 Late-T and Y Dwarfs Obtained with JWST
Cushing, Michael C.; Kirkpatrick, J. Davy; Marley, Mark S. +5 more
We present infrared spectral energy distributions of 23 late-type T and Y dwarfs obtained with the James Webb Space Telescope. The spectral energy distributions consist of NIRSpec PRISM and MIRI low-resolution spectrometer spectra covering the ∼1–12 µm wavelength range at λ/Δλ ≈ 100 and broadband photometry at 15, 18, and 21 µm. The sp…
Search for Dark Matter Ionization on the Night Side of Jupiter with Cassini
Blanco, Carlos; Leane, Rebecca K.
We present a new search for dark matter (DM) using planetary atmospheres. We point out that annihilating DM in planets can produce ionizing radiation, which can lead to excess production of ionospheric H3+ . We apply this search strategy to the night side of Jupiter near the equator. The night side has zero solar irradiation,…
The Metallicity Dependence of PAH Emission in Galaxies. I. Insights from Deep Radial Spitzer Spectroscopy
Skillman, Evan D.; Kennicutt, Robert C.; Dale, Daniel A. +9 more
We use deep Spitzer mid-infrared spectroscopic maps of radial strips across three nearby galaxies with well-studied metallicity gradients (M101, NGC 628, and NGC 2403) to explore the physical origins of the observed deficit of polycyclic aromatic hydrocarbons (PAHs) at subsolar metallicity (i.e., the PAH–metallicity relation or PZR). These maps al…
PDRs4All. VIII. Mid-infrared emission line inventory of the Orion Bar
Hartigan, Patrick; Zhang, Yong; Gordon, Karl D. +135 more
Context. Mid-infrared emission features are important probes of the properties of ionized gas and hot or warm molecular gas, which are difficult to probe at other wavelengths. The Orion Bar photodissociation region (PDR) is a bright, nearby, and frequently studied target containing large amounts of gas under these conditions. Under the "PDRs4All" …
A3COSMOS and A3GOODSS: Continuum source catalogues and multi-band number counts
Schinnerer, Eva; Liu, Daizhong; Béthermin, Matthieu +7 more
Context. Galaxy submillimetre number counts are a fundamental measurement in our understanding of galaxy evolution models. Most early measurements are obtained via single-dish telescopes with substantial source confusion, whereas recent interferometric observations are limited to small areas.
Aims: We used a large database of ALMA continuum o…
JWST reveals the rapid and strong day-side variability of 55 Cancri e
Fridlund, M.; Heng, K.; Persson, C. M. +16 more
Context. The nature of the close-in rocky planet 55 Cnce is puzzling, despite it having been observed extensively. Its optical and infrared occultation depths show temporal variability, in addition to a phase curve variability observed in the optical. Aims. We wish to explore the possibility that the variability originates from the planet being in…
A Population of Short-duration Gamma-Ray Bursts with Dwarf Host Galaxies
Leja, Joel; Fong, Wen-fai; Nugent, Anya E. +3 more
We present a population of 11 of the faintest (>25.5 AB mag) short gamma-ray burst (GRB) host galaxies. We model their sparse available observations using the stellar population inference code Prospector-β and develop a novel implementation to incorporate the galaxy mass–radius relation. Assuming these hosts are randomly drawn from the galaxy p…
GalaxyFlow: upsampling hydrodynamical simulations for realistic mock stellar catalogues
Lim, Sung Hak; Raman, Kailash A.; Buckley, Matthew R. +1 more
Cosmological N-body simulations of galaxies operate at the level of 'star particles' with a mass resolution on the scale of thousands of solar masses. Turning these simulations into stellar mock catalogues requires 'upsampling' the star particles into individual stars following the same phase-space density. In this paper, we introduce two new upsa…
The boring history of Gaia BH3 from isolated binary evolution
Trani, Alessandro A.; Iorio, Giuliano; Mapelli, Michela +15 more
Gaia BH3 is the first observed dormant black hole (BH) with a mass of ≈30 M⊙, and it represents the first confirmation that such massive BHs are associated with metal-poor stars. Here, we explore the isolated binary formation channel for Gaia BH3, focusing on the old and metal-poor stellar population of the Milky Way halo. We used the M…
The dynamic centres of infrared-dark clouds and the formation of cores
Peretto, Nicolas; Ragan, Sarah E.; Watkins, Elizabeth J. +7 more
High-mass stars have an enormous influence on the evolution of the interstellar medium in galaxies, so it is important that we understand how they form. We examine the central clumps within a sample of seven infrared-dark clouds (IRDCs) with a range of masses and morphologies. We use 1-pc-scale observations from the Northern Extended Millimeter Ar…