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A baseline on the relation between chemical patterns and the birth stellar cluster
Jofré, P.; Signor, T.; Martí, L. +1 more
Context. The chemical composition of a star's atmosphere reflects the chemical composition of its birth environment. Therefore, it should be feasible to recognize stars born together that have scattered throughout the galaxy, solely based on their chemistry. This concept, known as "strong chemical tagging", is a major objective of spectroscopic st…
Unveiling the Cosmic Cradle: clustering and massive star formation in the enigmatic Galactic bubble N59
Ojha, D. K.; Paulson, Sonu Tabitha; Mallick, K. K.
In this paper, we have conducted an investigation focused on a segment of the Spitzer mid-infrared bubble N59, specifically referred to as R1 within our study. Situated in the inner Galactic plane, this region stands out for its hosting of five 6.7 GHz methanol masers, as well as numerous compact $\mathrm{H}\, \rm {{\small II}}$ regions, massive c…
VELOcities of CEpheids (VELOCE): II. Systematic search for spectroscopic binary cepheids
Anderson, Richard I.; Szabados, László; Mowlavi, Nami +4 more
Classical Cepheids provide valuable insights into the evolution of stellar multiplicity among intermediate-mass stars. Here, we present a systematic investigation of single-lined spectroscopic binaries (SB1s) based on high-precision velocities measured by the VELOcities of CEpheids (VELOCE) project. We detected 76 (29%) SB1 systems among the 258 M…
ZZ Tau IRS: a Low Mass UX Ori Type Star with Strong Wind
Lamzin, S. A.; Strakhov, I. A.; Safonov, B. S. +7 more
The results of photometric, polarimetric, and spectroscopic observations of the young star ZZ Tau IRS in the visible and near-infrared bands are presented. Against the continuum of an M spectral type star about 50 emission lines of allowed (H I, He I, Na I, S II) and forbidden (O I, O II, O III, N I, N II, S II, Ca II, Fe II, Ni II) transitions we…
The YMCA (Yes, Magellanic Clouds Again) survey: Probing the outer regions of the Magellanic system with VST
Cignoni, M.; Tosi, M.; Ripepi, V. +9 more
Context. The Magellanic Clouds (MCs) are the Milky Way's most massive dwarf satellites. As they also represent the closest pair of galaxies in an ongoing tidal interaction while simultaneously infalling into the Milky Way halo, they provide a unique opportunity to study in detail an ongoing three-body encounter. Aims. We present the YMCA (Yes, Mag…
A Type Ia Supernova near a Globular Cluster in the Early-type Galaxy NGC 5353
Bregman, Joel N.; Qu, Zhijie; Gnedin, Oleg Y. +1 more
No progenitor of a Type Ia supernova (SN Ia) is known, but in old-population early-type galaxies, one may find SNe Ia associated with globular clusters, yielding a population age and metallicity. It also provides insight into the formation path and the SN enhancement rate in globular clusters. We sought to find such associations and identified SN …
A New Tidal Stream Discovered in Gaia DR3
Tian, Hao; Liu, Chao; Xue, Xiang-Xiang +2 more
Thanks to the precise astrometric measurements of proper motions by the Gaia mission, a new tidal stellar stream has been discovered in the northern hemisphere. The distribution of star count shows that the stream is approximately 80° long and 1.°70 wide. Observations of 21 member stars, including 14 RR Lyrae stars, indicate that the stream has an…
Strong Balmer break objects at z ∼ 7–10 uncovered with JWST
Schaerer, D.; Marques-Chaves, R.; Oesch, P. A. +4 more
We report the discovery of robust spectroscopically confirmed Balmer break (BB) galaxies and candidates, with secure spectroscopic redshifts 7.1 ≤ z ≤ 9.6, from publicly available James Webb Space Telescope (JWST) extra-galactic photometric and spectroscopic surveys. To achieve this, we used dedicated filters probing the BB and inspected the objec…
Dynamics of Binary Planets within Star Clusters
Kokubo, Eiichiro; Zhu, Wei; Huang, Yukun
We develop analytical tools and perform three-body simulations to investigate the orbital evolution and dynamical stability of binary planets within star clusters. Our analytical results show that the orbital stability of a planetary-mass binary against passing stars is mainly related to its orbital period. Critical flybys, defined as stellar enco…
Constraints on corona formation from an analysis of topographic rims and fracture annuli
Smrekar, Suzanne E.; Sabbeth, Leah; Carrington, Morgan A.
Coronae diameters defined by topographic rims, not fractures, are slightly larger. Most coronae have fracture annuli that overlap their topographic rims. Some corona models predict fractures interior to the topographic rims. There is little difference in the dimensions of rims with and without fractures. Fracture formation may be influenced by str…