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Globular Cluster Counts around 700 Nearby Galaxies
Cooper, Andrew P.; Le, Minh Ngoc
Empirically, the total number (or total mass) of globular clusters (GCs) bound in a single galactic system correlates with the virial mass of the system. The form of this relation and its intrinsic scatter are potentially valuable constraints on theories of GC formation and galaxy evolution. In this work, we use the DESI Legacy Imaging Survey (DES…
On the Nature of the Dark Cavity of Solar Coronal Mass Ejections
Chen, Yao; Xia, Lidong; Li, Leping +2 more
Earlier studies have shown that less than one-third of coronal mass ejections (CMEs) possess the archetypical three-part (bright core, dark cavity, and bright front) structure in the outer corona (e.g., 2–6 R⊙). In the traditional opinion, the core, cavity, and front correspond to the erupted filament, magnetic flux rope (MFR), and plas…
SKYCURTAINS: model-agnostic search for stellar streams with Gaia data
Shih, David; Sengupta, Debajyoti; Mulligan, Stephen +2 more
We present SKYCURTAINS, a data-driven and model-agnostic method to search for stellar streams in the Milky Way galaxy using data from the Gaia telescope.SKYCURTAINS is a weakly supervised machine learning algorithm that builds a background enriched template in the signal region by leveraging the correlation of the source's characterizing features …
CARMENES input catalogue of M dwarfs: IX. Multiplicity from close spectroscopic binaries to ultra-wide systems
Amado, P. J.; Caballero, J. A.; Reiners, A. +12 more
Context. Multiplicity studies greatly benefit from focusing on M dwarfs because they are often paired in a variety of configurations with both stellar and substellar objects, including exoplanets. Aims. We aim to address the observed multiplicity of M dwarfs by conducting a systematic analysis using the latest available astropho-tometric data. Met…
JWST Imaging of Edge-on Protoplanetary Disks. IV. Mid-infrared Dust Scattering in the HH 30 Disk
Duchêne, Gaspard; Wolff, Schuyler G.; Perrin, Marshall D. +10 more
We present near- and mid-infrared (IR) broadband imaging observations of the edge-on protoplanetary disk around HH 30 with the James Webb Space Telescope/Near Infrared Camera and the Mid-Infrared Instrument (MIRI). We combine these observations with archival optical/near-IR scattered light images obtained with the Hubble Space Telescope and a mill…
Photometric Determination of Unresolved Main-sequence Binaries in the Pleiades: Binary Fraction and Mass-ratio Distribution
Li, Lu; Shao, Zhengyi; Liu, Rongrong
Accurate determination of binary fractions (fb) and mass ratio (q) distributions is crucial for understanding the dynamical evolution of open clusters. We present an improved multiband fitting technique to enhance the analysis of binary properties. This approach enables an accurate photometric determination of fb and q distri…
Give to Ursa Minor what is Ursa Minor's: An updated census of the RR Lyrae population in the Ursa Minor dwarf galaxy based on Gaia DR3
Clementini, G.; Garofalo, A.; Muraveva, T. +2 more
Aims. We used RR Lyrae stars identified by the Gaia third data release (DR3) to explore the outskirts of the Ursa Minor (UMi) dwarf spheroidal galaxy (dSph) and update the census of its variable star population. Methods. We adopted different tools based on the Gaia DR3 astrometric and photometric data (proper motions, Period–Wesenheit–Metallicity …
Unfolding X-Ray Spectral Data: Conditions and Applications
Huenemoerder, David P.; Gunderson, Sean J.
We present conditions for which X-ray spectra can be "unfolded" to present an accurate representation of the true source spectra. The method we use to unfold the data is implemented in the Interactive Spectral Interpretation Software and distinguishes itself as being model-independent. We find that this method of unfolding makes accurate represent…
WALLABY Pilot Survey: Star Formation Enhancement and Suppression in Gas-rich Galaxy Pairs
Wang, Jing; Koribalski, B. S.; Westmeier, T. +16 more
Galaxy interactions can significantly affect the star formation in galaxies, but it remains a challenge to achieve a consensus on the star formation rate (SFR) enhancement in galaxy pairs. Here, we investigate the SFR enhancement of gas-rich galaxy pairs detected by the Widefield ASKAP L-band Legacy All-sky Blind surveY. We construct a sample of 2…
SIP-IFVM: Efficient time-accurate magnetohydrodynamic model of the corona and coronal mass ejections
Poedts, S.; Guo, Y.; Guo, J. H. +7 more
Context. Coronal mass ejections (CMEs) are one of the main drivers of space weather. However, robust and efficient numerical modelling applications of the initial stages of CME propagation and evolution process in the sub-Alfvénic corona are still lacking. Aims. Magnetohydrodynamic (MHD) solar coronal models are critical in the Sun-to-Earth model …