Results 161 to 170 of about 185,159 (346)

The APO-K2 Catalog. I. ∼7500 Red Giants with Fundamental Stellar Parameters from APOGEE DR17 Spectroscopy and K2-GAP Asteroseismology

open access: yesThe Astronomical Journal
We present a catalog of fundamental stellar properties for ∼7500 evolved stars, including stellar radii and masses, determined from the combination of spectroscopic observations from the Apache Point Observatory Galactic Evolution Experiment, part of the
Jessica Schonhut-Stasik   +16 more
doaj   +1 more source

Kinematical small-scale fluctuations do not affect the measurement of the dynamical mass of galaxies [PDF]

open access: yes
The stellar kinematics of low-mass galaxies are usually observed to be very unsmooth with significant kinematical fluctuations in small scales, which cannot be consistent with the projected centrosymmetric stellar kinematics obtained from commonly used dynamical models.
arxiv   +1 more source

Multistable Composite Laminate Grids as a Design Tool for Soft Reconfigurable Multirotors

open access: yesAdvanced Intelligent Systems, EarlyView.
Flexible, lightweight, stable: the reconfigurable multirotor combines stable flight in multiple shapes with low‐energy reconfiguration. Utilizing optimized multistable composites, it achieves self‐locking in open and folded configurations, cutting width‐span by 48% and allowing for safe gap traversal.
Luca Girardi   +4 more
wiley   +1 more source

Nuclear angular momentum of early-type galaxies hosting nuclear star clusters

open access: yes, 2019
Nucleation is a common phenomenon in all types of galaxies and at least 70% of them host nuclear star clusters (NSCs) in their centres. Many of the NSCs co-habit with super-massive black holes and follow similar scaling relations with host galaxy ...
Lyubenova, Mariya, Tsatsi, Athanassia
core   +1 more source

Stellar Populations of the Galactic Disk: Metallicity Distribution and Kinematics

open access: yesOpen Astronomy, 2003
Metallicities and distances have been determined from Vilnius photometry for an in situ sample of nearly 650 stars in eight proper-motion fields at high Galactic latitudes.
Bartašiūtė S.   +5 more
doaj   +1 more source

Tiling Robotics: A New Paradigm of Shape‐Morphing Reconfigurable Robots

open access: yesAdvanced Intelligent Systems, EarlyView.
Tiling robotics is a novel paradigm of shape‐morphing reconfigurable robots, defining them as polyform‐inspired machines capable of transforming between at least two polymorphic shapes. Various reconfiguration‐enabling and locomotion mechanisms of tiling robots are comparatively analyzed, with the electromechanical developments, along with a proposed ...
S. M. Bhagya P. Samarakoon   +2 more
wiley   +1 more source

Dynamics of Star Cluster Formation: Mergers in Gas-rich Environments

open access: yesThe Astrophysical Journal
We perform high-resolution simulations of forming star clusters as they merge inside giant molecular clouds (GMCs) using hydrodynamics coupled to N -body dynamics to simultaneously model both the gas and stars.
Jeremy Karam, Alison Sills
doaj   +1 more source

Internal Kinematics of Dward Spheroidal Galaxies [PDF]

open access: yesarXiv, 1997
We discuss the quality of kinematic data in dwarf spheroidal galaxies, the current interpretations of those data, and prospects for actually deriving the mass profile in these galaxies. We then discuss stellar populations constraints on some of the models that attempt to explain the kinematics and formation of the dSph's.
arxiv  

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