Search Publications
ICM-SHOX. I. Methodology Overview and Discovery of a Gas–Dark Matter Velocity Decoupling in the MACS J0018.5+1626 Merger
Mroczkowski, Tony; Zitrin, Adi; Stanford, S. A. +12 more
Galaxy cluster mergers are rich sources of information to test cluster astrophysics and cosmology. However, cluster mergers produce complex projected signals that are difficult to interpret physically from individual observational probes. Multi-probe constraints on the gas and dark matter (DM) cluster components are necessary to infer merger param…
Unraveling the Tectonic History of the Tharsis Rise on Mars: Plume Migration and Critical Taper Dome
Karagoz, Oguzcan; Kenkmann, Thomas; Hergarten, Stefan
Wrinkle ridges are widespread tectonic landforms that serve as paleo-strain and paleo-stress indicators of the compressional history and thermal evolution of Mars. To reconstruct the center of the Tharsis rise and its migration with time, we mapped wrinkle ridges in the periphery of the dome and analyzed 34,741 wrinkle ridge segments with a total …
First resolved stellar halo kinematics of a Milky Way-mass galaxy outside the Local Group: The flat counter-rotating halo in NGC 4945
Bell, Eric F.; Monachesi, Antonela; Bailin, Jeremy +6 more
The stellar halos of galaxies, primarily formed through the accretion and merger of smaller objects, are an important tool for understanding the hierarchical mass assembly of galaxies. However, the inner regions of stellar halos in disk galaxies are predicted to have an in situ component that is expected to be prominent along the major axis. Kinem…
Magnetic activity of radio stars based on TESS and LAMOST surveys
Zhang, Liyun; Han, Xianming L.; Misra, Prabhakar +2 more
Aims: Stellar flares serve as crucial indicators stellar magnetic activity. Radio emissions were detectable across all stages of stellar evolution. We define radio stars in our paper as stars with radio continuum emission in the frequency region of about 1.4-375 GHz from the catalog published by Wendker (1995, A&AS, 109, 177; 2015, VizieR…
Discovered a new open cluster near the poorly studied Majaess 190
Tadross, A. L.
We present the results of a comprehensive astrophysical study of a newly discovered open cluster, dubbed Ash-1. Using the third data release of the Gaia space mission, Gaia DR3, Ash-1 was accidentally discovered within the constellation Sagittarius in the field of the poorly studied cluster Majaess 190. Here we present the first estimates of these…
Mass-loss Rate of Highly Evolved Stars in the Magellanic Clouds
Yang, Ming; Gao, Jian; Ren, Yi +3 more
Asymptotic giant branch stars (AGBs) and red supergiant stars (RSGs) exhibit significant mass-loss phenomena and are considered important sources of interstellar dust. In this work, we employed a uniform method of spectral energy distribution fitting to analyze a large, and hence statistically significant, sample of approximately 40,000 RSGs and A…
RedDots: Limits on habitable and undetected planets orbiting nearby stars GJ 832, GJ 674, and Ross 128
Amado, P. J.; Caballero, J. A.; Reiners, A. +16 more
Context. The nearby (d < 5 pc) M dwarfs GJ 832, GJ 674, and Ross 128 each host a single exoplanet, with Ross 128 b located within the optimistic habitable zone. Due to their low mass and close proximity, these three systems are prime candidates for further characterization studies. Aims. Using HARPS spectroscopic data obtained by the RedDots ca…
Spectral and Imaging Observations of a C2.3 White-Light Flare from the Advanced Space-Based Solar Observatory (ASO-S) and the Chinese HαSolar Explorer (CHASE)
Lei, Shijun; Chen, Wei; Feng, Li +27 more
Solar white-light flares are characterized by an enhancement in the optical continuum, which are usually large flares (X- and M-class flares). Here, we report a small C2.3 white-light flare (SOL2022-12-20T04:10) observed by the Advanced Space-based Solar Observatory and the Chinese HαSolar Explorer (CHASE). This flare exhibits an increase of ≈ 6.4…
Identifying New High-confidence Polluted White Dwarf Candidates Using Gaia XP Spectra and Self-organizing Maps
Villaver, Eva; Pérez-Couto, Xabier; Pallas-Quintela, Lara +2 more
The identification of new white dwarfs (WDs) polluted with heavy elements is important since they provide a valuable tool for inferring the chemical properties of putative planetary systems accreting material on their surfaces. The Gaia space mission has provided us with an unprecedented amount of astrometric, photometric, and low-resolution (XP) …
Finding dusty AGNs from the JWST CEERS survey with mid-infrared photometry
Kilerci, Ece; Hashimoto, Tetsuya; Goto, Tomotsugu +8 more
The nature of the interaction between active galactic nuclei (AGNs) and their host galaxies remains an unsolved question. Therefore, conducting an AGN census is valuable for AGN research. Nevertheless, a significant fraction of AGNs are obscured by their environment, which blocks UV and optical emissions due to the dusty torus surrounding the cent…