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The First Flight of the Marshall Grazing Incidence X-Ray Spectrometer (MaGIXS)
Reeves, Katharine K.; Del Zanna, Giulio; Golub, Leon +35 more
The Marshall Grazing Incidence X-ray Spectrometer (MaGIXS) sounding rocket experiment launched on 2021 July 30 from the White Sands Missile Range in New Mexico. MaGIXS is a unique solar observing telescope developed to capture X-ray spectral images of coronal active regions in the 6-24 Å wavelength range. Its novel design takes advantage of recent…
On the Reionization-era Globular Cluster in the Low-mass Galaxy Eridanus II
Dolphin, Andrew E.; Weisz, Daniel R.; Savino, Alessandro
Using color-magnitude diagrams from deep archival Hubble Space Telescope imaging, we self-consistently measure the star formation history of Eridanus II (Eri II), the lowest-mass galaxy (M ⋆(z = 0) ~ 105 M ⊙) known to host a globular cluster (GC), and the age, mass, and metallicity of its GC. The GC (~13.2 ± 0.4 Gy…
JWST NIRCam Observations of SN 1987A: Spitzer Comparison and Spectral Decomposition
Temim, Tea; Boyer, Martha L.; Gall, Christa +24 more
JWST Near Infrared Camera (NIRCam) observations at 1.5-4.5 µm have provided broadband and narrowband imaging of the evolving remnant of SN 1987A with unparalleled sensitivity and spatial resolution. Comparing with previous marginally spatially resolved Spitzer Infrared Array Camera (IRAC) observations from 2004 to 2019 confirms that the emis…
Unfolding Drift Effects for Cosmic Rays over the Period of the Sun's Magnetic Field Reversal
Luo, Xi; Potgieter, M. S.; Aslam, O. P. M. +2 more
A well-established, comprehensive 3D numerical modulation model is applied to simulate galactic protons, electrons, and positrons from 2011 May to 2015 May, including the solar magnetic polarity reversal of Solar Cycle 24. The objective is to evaluate how simulations compare with corresponding Alpha Magnetic Spectrometer observations for 1.0-3.0 G…
Understanding the Lateral Drifting of an Erupting Filament with a Data-constrained Magnetohydrodynamic Simulation
Schmieder, B.; Poedts, S.; Li, C. +6 more
Solar filaments often exhibit rotation and deflection during eruptions, which would significantly affect the geoeffectiveness of the corresponding coronal mass ejections (CMEs). Therefore, understanding the mechanisms that lead to such rotation and lateral displacement of filaments is a great concern to space weather forecasting. In this paper, we…
Dust Properties of 870 µm-selected Galaxies in GOODS-S
Bauer, F. E.; Barger, A. J.; Cowie, L. L. +2 more
We analyze the dust properties of 57 870 µm-selected dusty star-forming galaxies in GOODS-S using new deep Atacama Large Millimeter/Submillimeter Array 1.2, 2, and 3 mm continuum imaging together with other far-infrared through millimeter data. We fit the spectral energy distributions (SEDs) with optically thin modified blackbodies to constr…
Solution to the Conflict between the Estimations of Resolved and Unresolved Galaxy Stellar Mass from the Perspective of JWST
Lin, Zesen; Kong, Xu; Gu, Yizhou +2 more
By utilizing the spatially resolved photometry of galaxies at 0.2 < z < 3.0 in the CEERS field, we estimate the resolved and unresolved stellar mass via fitting of the spectral energy distribution (SED) to study the discrepancy between them. We first compare M * derived from photometry with and without the JWST wavelength coverage…
GlobULeS. IV. UVIT/AstroSat Detection of Extremely Low Mass White Dwarf Companions to Blue Straggler Stars in NGC 362
Dattatrey, Arvind K.; Yadav, R. K. S.; Sahu, Snehalata +4 more
We report the discovery of extremely low mass white dwarfs (ELM WDs) as a companion of blue straggler stars (BSSs) in the Galactic globular cluster NGC 362 using images from AstroSat's Ultra Violet Imaging Telescope (UVIT). Spectral energy distributions (SEDs) for 26 far-UV (FUV) bright member BSSs are created using data from the UVIT, the UltraVi…
The ESO-VLT MIKiS Survey Reloaded: Exploring the Internal Kinematics of NGC 6440
Vesperini, Enrico; Cadelano, Mario; Pallanca, Cristina +7 more
In the context of the ESO-VLT Multi-Instrument Kinematic Survey of Galactic globular clusters, here we present the line-of-sight velocity dispersion profile of NGC 6440, a massive globular cluster located in the Galactic bulge. By combining the data acquired with four different spectrographs, we obtained the radial velocity of a sample of ~1800 in…
A New Galaxy Cluster Merger Capable of Probing Dark Matter: A56
Finner, Kyle; Wittman, David; Stancioli, Rodrigo +3 more
We report the discovery of a binary galaxy cluster merger via a search of the redMaPPer optical cluster catalog, with a projected separation of 535 kpc between the brightest cluster galaxies (BCGs). Archival XMM-Newton spectro-imaging reveals a gas peak between the BCGs, suggesting a recent pericenter passage. We conduct a galaxy redshift survey t…