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Gas compression and stellar feedback in the tidally interacting and ram-pressure stripped Virgo spiral galaxy NGC 4654
Braine, J.; Vollmer, B.; Lizée, T. +1 more
Due to an environment that promotes gravitational interactions and ram pressure stripping, galaxies within clusters are particularly likely to present unusual interstellar medium (ISM) properties. NGC 4654 is a Virgo cluster galaxy seen almost face-on, which undergoes nearly edge-on gas ram pressure stripping and a fly-by gravitational interaction…
Slowly cooling white dwarfs in M13 from stable hydrogen burning
Cadelano, Mario; Pallanca, Cristina; Dalessandro, Emanuele +5 more
White dwarfs (WDs) are the final evolutionary product of the vast majority of stars in the Universe. They are electron-degenerate structures characterized by no stable thermonuclear activity, and their evolution is generally described as a pure cooling process. Their cooling rate is adopted as cosmic chronometer to constrain the age of several Gal…
The Black Hole Mass of NGC 4151 from Stellar Dynamical Modeling
Vasiliev, Eugene; Onken, Christopher A.; Bentz, Misty C. +2 more
The mass of a supermassive black hole (MBH) is a fundamental property that can be obtained through observational methods. Constraining MBH through multiple methods for an individual galaxy is important for verifying the accuracy of different techniques and for investigating the assumptions inherent in each method. However, th…
Lava Flow Eruption Conditions in the Tharsis Volcanic Province on Mars
Christensen, P. R.; Peters, S. I.; Clarke, A. B.
Volcanism has played a major role in modifying the Martian surface. The Tharsis volcanic province dominates the western hemisphere of the planet with numerous effusive volcanic constructs and deposits. Here, we present the results of an in-depth study aimed at characterizing and modeling the emplacement conditions of 40 lava flows in the Tharsis v…
The evolution of the low-density H I> intergalactic medium from z = 3.6 to 0: data, transmitted flux, and H I> column density,
Savage, B. D.; Wakker, B. P.; Viel, M. +8 more
We present a new, uniform analysis of the H I transmitted flux (F) and H I column density ($N_{\mathrm{H\,{\small I}}}$) distribution in the low-density IGM as a function of redshift z for 0 < z < 3.6 using 55 HST/COS FUV (Δz = 7.2 at z < 0.5), five HST/STIS + COS NUV (Δz = 1.3 at z ~ 1) and 24 VLT/UVES, and Keck/HIRES (Δz = 11.6 at 1.7 &…
Correlated X-Ray and Optical Variability in the O-type Supergiant ζ Puppis
Moffat, Anthony F. J.; Richardson, Noel D.; Nichols, Joy S. +11 more
Analysis of the recent long exposure Chandra X-ray observation of the early-type O star ζ Pup shows clear variability with a period previously reported in optical photometric studies. These 813 ks of HETGS observations taken over a roughly one-year time span have two signals of periodic variability: (1) a high-significance period of 1.7820 ± 0.000…
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…