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Forest Fire Clustering: A Novel Tool for Identifying Star Members of Clusters
Yang, Hao; Chen, Jing; Zhang, Su +6 more
In the era of a data-driven landscape, the development of an efficient and interpretable method has become a pivotal tool for robustly identifying memberships of clusters. We present a novel cluster finder approach called forest fire clustering (FFC). FFC combines iterative label propagation with parallel Monte Carlo simulation to achieve internal…
A Planet Candidate Orbiting near the Hot Jupiter TOI-2818 b Inferred through Transit Timing
Winn, Joshua N.; Montet, Benjamin T.; Hartman, Joel D. +5 more
TOI-2818 b is a hot Jupiter orbiting a slightly evolved G-type star on a 4.04 day orbit that shows transit timing variations (TTVs) suggestive of a decreasing orbital period. In the most recent year of TESS observations, transits were observed ∼8 minutes earlier than expected for a constant period. The implied orbital decay rate is 1.35 ± 0.25 s y…
On the Age Calibration of Open Clusters Using Red Clump Stars
Worthey, Guy; Chriss, Abigail R.
In this study, we extend the dust-independent Hatzidimitriou relation between cluster age and dB‑R color difference between the red giant branch (RGB) and red clump to younger cluster ages. We perform membership analysis on 14 galactic open clusters using Gaia DR3 astrometry, then compute the difference in color of the RGB and red clump…
Surface activity of H2 2
Tenishev, Valeriy; Fougere, Nicolas; Combi, Michael +3 more
On November 4, 2010, the EPOXI extended the mission of the Deep Impact spacecraft, flew by comet 103P/Hartley 2, and made a series of spectral images in both the infrared and the visible. The High-Resolution Instrument Infrared Spectrometer (HRI-IR) observed the comet and its surrounding coma, enabling maps in the light of the infrared emissions o…
Background exoplanet candidates in the original Kepler field
Szabó, R.; Bienias, J.
Context. During the primary Kepler mission, between 2009 and 2013, about 150 000 pre-selected targets were observed with a 29.42 minute-long cadence. However, a survey of background stars that fall within the field of view of the downloaded apertures of the primary targets has revealed a number of interesting objects. In previous papers we have pr…
The total mass of the close, double degenerate (DA+DQ) system NLTT 16249
Vennes, Stéphane; Kawka, Adela
We revisit the binary and stellar properties of the double-degenerate system NLTT 16249. An analysis of new echelle spectra, supported by a joint study of a DQZ velocity template NLTT 44303, confirms the orbital period and constrains the mass ratio revealing a carbon-polluted DQ white dwarf that is up to
Enigmatic ice leaves cold trail
Woods, Paul
Temporal-spatial distribution of YSOs nearby Taurus region
Fang, Min; Deng, Licai; Wang, Xiaolong +3 more
The Taurus region is one of the most extensively studied star-forming regions (SFRs). Surveys indicate that the young stars in this region are comprised of young stellar objects (YSOs) that cluster in groups associated with the molecular cloud (Grouped Young Stellar Objects, GYSOs), and some older ones that are sparsely distributed throughout the …
A conceptual model for the formation of ramparts on Martian impact crater ejecta
Boyce, Joseph M.; Mouginis-Mark, Peter J.
Mars Orbiter Laser Altimeter (MOLA) elevation measurements for 23 different impact craters and 12 different long runout landslides show rampart ridges on Martian fluidized ejecta flows are higher relief than those on Martian landslides. We propose a conceptual model to explain this height difference that is based on the effects of the impact and e…
Editor's Note: The X-Ray Mysteries of Neutron Stars and White Dwarfs
Schartel, Norbert