Tootfinder

Charged Particle Oscillations around a Black Hole Surrounded by CDM Halos
Zakaria Ahal, Hasan El Moumni, Karima Masmar
https://arxiv.org/abs/2507.11139 htt…

Charged Particle Oscillations around a Black Hole Surrounded by CDM Halos
HF QPOs are among the most intriguing phenomena observed in LMXBs containing BHs or neutron stars. In this work, we investigate charged particles' dynamics in the nearby of a Schwarzschild-like BH embedded in a uniform magnetic field and surrounded on all sides by CDM. Thereby gaining deeper insight into the influence of magnetic and DM distributions on observable phenomena near compact objects. We first present a modified metric, which incorporates the effects of a CDM ... We compute the fun…

A Machine Learning empowered search for Sub-Minute Optical Transient Events with the Deeper, Wider, Faster programme
Simon R. Goode, Sara A. Webb, Jeff Cooke, Jielai Zhang, James Freeburn, Amy Lien, Mohsen Shamohammadi, Alexandra Rosenthal, Laura N. Driessen, Christopher Fluke, Ashish Mahabal, Anais M\"oller, Dougal Dobie, Adam Batten, Natasha Van Bemmel
h…

A Machine Learning empowered search for Sub-Minute Optical Transient Events with the Deeper, Wider, Faster programme
Optical transient surveys continue to generate increasingly large datasets, prompting the introduction of machine-learning algorithms to search for quality transient candidates efficiently. Existing machine-learning infrastructure can be leveraged in novel ways to search these datasets for new classes of transients. We present a machine-learning accelerated search pipeline for the Deeper, Wider, Faster (DWF) programme designed to identify high-quality astrophysical transient candidates that con…

A Systematic Search for Main-Sequence Dipper Stars Using the Zwicky Transient Facility
Anastasios Tzanidakis, James R. A. Davenport, Neven Caplar, Eric C. Bellm, Wilson Beebe, Doug Branton, Sandro Campos, Andrew J. Connolly, Melissa DeLucchi, Konstantin Malanchev, Sean McGuire
https://arxiv.org/abs/2508.03964…

A Systematic Search for Main-Sequence Dipper Stars Using the Zwicky Transient Facility
Main-sequence dipper stars, characterized by irregular and often aperiodic luminosity dimming events, offer a unique opportunity to explore the variability of circumstellar material and its potential links to planet formation, debris disks, and broadly star-planet interactions. The advent of all-sky time-domain surveys has enabled the rapid discovery of these unique systems. We present the results of a large systematic search for main-sequence dipper stars, conducted across a sample of 63 milli…

The Roasting Marshmallows Program with IGRINS on Gemini South III: Seeing deeper into the metal depleted atmosphere of a gas-giant on the cusp of the hot to ultra-hot Jupiter transition
Vatsal Panwar, Matteo Brogi, Krishna Kanumalla, Michael R. Line, Siddharth Gandhi, Peter C. B. Smith, Jacob L. Bean, Lorenzo Pino, Arjun B. Savel, Joost P. Wardenier, Heather Cegla, Hayley Beltz, Megan Weiner Mansfield, Jorge A. Sanchez, Jean-Michel D\'esert, Luis Welbanks, Viven Parmentier, Changwo…

The Roasting Marshmallows Program with IGRINS on Gemini South III: Seeing deeper into the metal depleted atmosphere of a gas-giant on the cusp of the hot to ultra-hot Jupiter transition
Ultra-hot Jupiters are a class of gas-giant exoplanets that show a peculiar combination of thermochemical properties in the form of molecular dissociation, atomic ionization, and inverted thermal structures. Atmospheric characterization of gas giants lying in the transitional regime between hot and ultra-hot Jupiters can help in understanding the physical mechanisms that cause the fundamental transition in atmospheres between the two classes of hot gas giants. Using Doppler spectroscopy with IG…

The Blooming Tree Algorithm at Work: Clusters, Filaments and Superclusters in the Field of A2029
Heng Yu, Antonaldo Diaferio
https://arxiv.org/abs/2508.07828 https://

The Blooming Tree Algorithm at Work: Clusters, Filaments and Superclusters in the Field of A2029
The Blooming Tree (BT) algorithm, based on the hierarchical clustering method, is designed to identify clusters, groups, and substructures from galaxy redshift surveys. We apply the BT algorithm to a wide-field ($10\times 10$ deg$^2$) spectroscopic dataset centered on the galaxy cluster A2029. The BT algorithm effectively identifies all the X-ray luminous clusters and most of the optical clusters known in the literature, numerous groups, and the filaments surrounding the clusters, associating a…

"Antoine de Saint-Exupéry, author of the second-most translated book of all time, colorfully explained (also in French) the importance of dress in our society through a simple anecdote: the planet of the Little Prince had been discovered in 1909 by a Turkish astronomer that nobody took seriously because of his traditional clothes. Repeating his conference in 1920, this time in suit and tie after a reform in his country, he had been applauded at length."

The HI-to-H2 transition in the Draco cloud
Nicola Schneider (I. Physik.Institut, University of Cologne), Volker Ossenkopf-Okada (I. Physik.Institut, University of Cologne), Markus Roellig (Physikalischer Verein, Frankfurt, I. Physik.Institut, University of Cologne), Daniel Seifried (I. Physik.Institut, University of Cologne), Ralf S. Klessen (University of Heidelberg, Zentrum fuer Astronomie, Heidelberg), Alexei G. Kritsuk (Physics Department, University of California, San Diego), Edua…

The HI-to-H2 transition in the Draco cloud
In recent decades, significant attention has been dedicated to analytical and observational studies of the atomic hydrogen (HI) to molecular hydrogen (H2) transition in the interstellar medium. We focussed on the Draco diffuse cloud to gain deeper insights into the physical properties of the transition from HI to H2. We employed the total hydrogen column density probability distribution function (N-PDF) derived from Herschel dust observations and the N(HI)-PDF obtained from HI data collected by…

Hui, dafür dass ich nie Blumen kaufe und die 9 EUR-Pflanze für eher kurzlebig hielt, macht sie sich - sogar noch eine Blüte gekommen (in Obhut der Beschenkten).
Ich weiß nicht mal, was das fpr eine Pflanze war.
#noobBotaniker #noobDekorateur

Exoplanet Atmospheric Escape Observations with the Habitable Worlds Observatory
Leonardo A. Dos Santos, Eric D. Lopez, Luca Fossati, Antonio Garc\'ia Mu\~noz, Shingo Kameda, Munazza K. Alam, Keighley Rockcliffe, Seth Redfield, Yuichi Ito, Joshua Lothringer, Shreyas Vissapragada, Hannah R. Wakeford, Apurva V. Oza, Girish M. Duvvuri, Raissa Estrela, Ryoya Sakata, Chuanfei Dong, Ziyu Huang

Exoplanet Atmospheric Escape Observations with the Habitable Worlds Observatory
The Decadal Survey on Astronomy and Astrophysics 2020 highlights the importance of advancing research focused on discovering and characterizing habitable worlds. In line with this priority, our goal is to investigate how planetary systems evolve through atmospheric escape and to develop methods for identifying potentially Earth-like planets. By leveraging the ultraviolet (UV) capabilities of the Habitable Worlds Observatory (HWO), we can use transit spectroscopy to observe atmospheric escape in…

HWO Target Stars and Systems: A Survey of Archival UV and X-ray Data
Sarah Peacock, David J. Wilson, Tyler Richey-Yowell, Noah W. Tuchow, Kevin France, Jos\'e A. Caballero, Riccardo Spinelli, L\'ia Corrales, Aiden S. Zelakiewicz, Seth Redfield, Keighley Rockcliffe, Allison Youngblood, Cynthia S. Froning, Girish M. Duvvuri, Breanna A. Binder, Natalie R. Hinkel, Eric E. Mamajek
…

HWO Target Stars and Systems: A Survey of Archival UV and X-ray Data
We assess archival high-energy data for key stars on the Habitable Worlds Observatory (HWO) Target Stars and Systems 2025 list, as stellar radiation is critical to shaping and interpreting planetary atmospheres. Using a sample of 98 nearby stars (HWO Tier 1 targets), we compile and evaluate X-ray and ultraviolet (UV) data from archival eROSITA, Chandra, XMM-Newton, ROSAT, EUVE, Swift, FUSE, IUE, GALEX, and HST. We examine spectral and temporal coverage, assess data quality, and identify major g…