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XMM-Newton and NuSTAR discovery of a likely IP candidate XMMU J173029.8–330920 in the Galactic disc
Hailey, Charles J.; Mori, Kaya; Rea, Nanda +7 more
Aims. We aim to characterise the population of low-luminosity X-ray sources in the Galactic plane by studying their X-ray spectra and periodic signals in the light curves. Methods. We are performing an X-ray survey of the Galactic disc using XMM-Newton, and the source XMMU J173029.8–330920 was serendipitously discovered in our campaign. We perform…
Correction to: Stellar clustering and the kinematics of stars around Collinder 121 using Gaia DR3
Ward-Thompson, Derek; Fleming, Graham D.; Kirk, Jason M.
Gemini Planet Imager Observations of a Resolved Low-inclination Debris Disk around HD 156623
Crotts, Katie A.; Matthews, Brenda C.; Duchêne, Gaspard +12 more
The 16 Myr old A0V star HD 156623 in the Scorpius–Centaurus association hosts a high-fractional-luminosity debris disk, recently resolved in scattered light for the first time by the Gemini Planet Imager (GPI) in polarized intensity only. We present a new analysis of the GPI H-band polarimetric detection of the HD 156623 debris disk, with particul…
Study of the \boldsymbol{\mu}
Semenko, E. A.; Yakunin, I. A.; Ryabchikova, T. A. +8 more
We present a refined speckle-interferometric orbit of a binary system
Electron Densities of Transition Region Loops Derived from IRIS O IV Spectral Data
Fu, Hui; Xia, Lidong; Huang, Zhenghua +4 more
Loops are fundamental structures in the magnetized atmosphere of the Sun. Their physical properties are crucial for understanding the nature of the solar atmosphere. Transition region loops are relatively dynamic and their physical properties have not yet been fully understood. With spectral data of the line pair of O IV 1399.8 Å and 1401.2 Å (
Geostratigraphic Mapping of the Intrusive Valentine Domes on the Moon
Rossi, Angelo Pio; Suárez-Valencia, Javier Eduardo
Lunar intrusive igneous domes have not been the center of much research in the past due to their rare occurrence on the lunar surface, and the difficulty in locating them. Most of the known structures were discovered using images with low illumination angles, including data from the Lunar Orbiter, telescopic images, and photos taken during the Apo…
The Variable Stars Population of the Extended Young Globular Cluster NGC 1851
Arellano Ferro, A.; Prudil, Z.; Yepez, M. A. +3 more
We report <i<>VI CCD photometry of the globular cluster NGC 1851. We aim to study the membership of the variable stars detected in the field of the cluster as listed in the Catalogue of Variable stars in Globular Clusters (CVSGC; Clement et al. 2001) and reported by the Gaia mission. We cross match the two sets of variables to produce lig…
Aperture and Resolution Effects on Ultraviolet Star-forming Properties: Insights from Local Galaxies and Implications for High-redshift Observations
Leitherer, Claus; Berg, Danielle A.; Arellano-Córdova, Karla Z. +2 more
We present an analysis of the effects of spectral resolution and aperture scale on derived galaxy properties using far-ultraviolet (FUV) spectra of local star-forming galaxies from the International Ultraviolet Explorer (R ∼ 250, field of view (FOV) ∼ 10″ × 20″) and Cosmic Origins Spectrograph on the Hubble Space Telescope (R ∼ 15,000, FOV ∼ 2.″5)…
The challenge of identifying INTEGRAL sources on the Galactic plane
Ubertini, Pietro; Bazzano, Angela; Fiocchi, Mariateresa +6 more
The International Gamma-ray Astrophysics Laboratory (INTEGRAL) has been surveying the sky above 20 keV since its launch in 2002 providing new insights into the nature of the sources that populate our Universe at soft γ-ray energies. The latest IBIS/ISGRI survey lists 929 hard X-ray sources, of which 113 are reported as unidentified, i.e. lacking a…
Localized ejection of dust and chunks on comet 67P/Churyumov-Gerasimenko: testing how comets work
Blum, J.; Gundlach, B.; Attree, N. +2 more
We extend an existing thermophysical activity model of comet 67P/Churyumov-Gerasimenko to include pressure build-up inside the pebbles making up the nucleus. We test various quantities of H