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Discovery of a young low-mass brown dwarf transiting a fast-rotating F-type star by the Galactic Plane eXoplanet (GPX) survey
Vanderburg, A.; Molina, D.; Bonfanti, A. +64 more
We announce the discovery of GPX-1 b, a transiting brown dwarf with a mass of 19.7 ± 1.6 MJup and a radius of 1.47 ± 0.10 RJup, the first substellar object discovered by the Galactic Plane eXoplanet (GPX) survey. The brown dwarf transits a moderately bright (V = 12.3 mag) fast-rotating F-type star with a projected rotational …
The PAU survey: estimating galaxy photometry with deep learning
Carretero, J.; Castander, F. J.; García-Bellido, J. +14 more
With the dramatic rise in high-quality galaxy data expected from Euclid and Vera C. Rubin Observatory, there will be increasing demand for fast high-precision methods for measuring galaxy fluxes. These will be essential for inferring the redshifts of the galaxies. In this paper, we introduce LUMOS, a deep learning method to measure photometry from…
First observations from the SPICE EUV spectrometer on Solar Orbiter
Williams, D.; Peter, H.; Chitta, L. P. +28 more
Aims: We present first science observations taken during the commissioning activities of the Spectral Imaging of the Coronal Environment (SPICE) instrument on the ESA/NASA Solar Orbiter mission. SPICE is a high-resolution imaging spectrometer operating at extreme ultraviolet (EUV) wavelengths. In this paper we illustrate the possible types of…
The Lyman Alpha Spectral Database (LASD)
Hayes, Matthew; Gronke, Max; Runnholm, Axel
Lymanα (Lyα) emission from star-forming galaxies is an important tool to study a large range of astrophysical questions: it has the potential to carry information about the source galaxy, its nearby circumgalactic medium, and also the surrounding intergalactic medium. Substantial observational and theoretical work has therefore focused on understa…
A Comparison of Rest-frame Ultraviolet and Optical Emission-line Diagnostics in the Lensed Galaxy SDSS J1723+3411 at Redshift z = 1.3293
Rigby, J. R.; Momcheva, Ivelina; Brammer, Gabriel +13 more
For the extremely bright lensed galaxy SDSS J1723+3411 at z = 1.3293, we analyze spatially integrated MMT, Keck, and Hubble Space Telescope spectra that fully cover the rest-frame wavelength range of 1400-7200 Å. We also analyze near-IR spectra from Gemini that cover Hα for a portion of the lensed arc. We report fluxes for 42 detected emission lin…
A Characterization of the Circumstellar Gas of WD 1124-293 Using Cloudy
Dufour, Patrick; Steele, Amy; Debes, John +2 more
Between 30% and 50% of white dwarfs (WDs) show heavy elements in their atmospheres. This pollution is thought to arise from the accretion of planetesimals perturbed by outer planet(s) to within the WD's tidal disruption radius. A small fraction of these WDs show either emission or absorption from circumstellar (C-S) gas. The abundances of metals i…
Measuring cosmic density of neutral hydrogen via stacking the DINGO-VLA data
Brough, S.; Staveley-Smith, Lister; Holwerda, B. W. +13 more
We use the 21-cm emission-line data from the Deep Investigation of Neutral Gas Origin-Very Large Array (DINGO-VLA) project to study the atomic hydrogen gas H I of the Universe at redshifts z < 0.1. Results are obtained using a stacking analysis, combining the H I signals from 3622 galaxies extracted from 267 VLA pointings in the G09 field of th…
The Carbon-to-H2, CO-to-H2 conversion factors, and carbon abundance on kiloparsec scales in nearby galaxies
Gao, Yu; Zhao, Yinghe; Jiao, Qian
Using the atomic carbon [C I] ($^{3} \rm P_{1} \rightarrow {\rm ^3 P}_{0}$) and [C I] ($^{3} \rm P_{2} \rightarrow {\rm ^3 P}_{1}$) emission {hereafter [C I] (1 - 0) and [C I] (2 - 1), respectively} maps observed with the Herschel Space Observatory, and CO (1 - 0), H I, infrared and submm maps from literatures, we estimate the [C I]-to-H2
Potential Black Hole Seeding of the Spiral Galaxy NGC 4424 via an Infalling Star Cluster
Soria, Roberto; Ciambur, Bogdan C.; Swartz, Douglas A. +2 more
Galaxies can grow through their mutual gravitational attraction and subsequent union. While orbiting a regular high-surface-brightness galaxy, the body of a low-mass galaxy can be stripped away. However, the stellar heart of the infalling galaxy, if represented by a tightly bound nuclear star cluster, is more resilient. From archival Hubble Space …
The BepiColombo Laser Altimeter
Lara, L. M.; Oberst, J.; Thomas, N. +48 more
The BepiColombo Laser Altimeter (BELA) is the first European laser altimeter constructed for interplanetary flight. BELA uses a 50 mJ pulsed Nd:YAG laser operating at 10 Hz with a 20 cm aperture receiver to perform the ranging. The instrument also uses a digital approach for range detection and pulse analysis. The ranging accuracy is expected to b…