Results 31 to 40 of about 257,486 (317)
The 800 pc long tidal tails of the Hyades star cluster [PDF]
Astronomy & Astrophysics, 2021 The tidal tails of stellar clusters provide an important tool for studying the birth conditions of the clusters and their evolution, coupling, and interaction with the Galactic potential. The Gaia satellite, with its high-quality astrometric data, opened
T. Jeřábková +5 more
semanticscholar +1 more source
A stream come true: Connecting tidal tails, shells, streams, and planes with galaxy kinematics and formation history [PDF]
Astronomy & Astrophysics, 2022 The rapidly improving quality and resolution of both low surface brightness observations and cosmological simulations of galaxies enable us to address the important question of how the formation history is imprinted in the outer unrelaxed regions of ...
L. Valenzuela, R. Remus
semanticscholar +1 more source
The Progenitor of the Peculiar Galaxy NGC 3077
The Astrophysical Journal, 2023 We present a study of the structural properties and metallicity distribution of the nearby peculiar galaxy NGC 3077. Using data from our survey of the M81 Group with the Hyper Suprime-Cam on board the Subaru Telescope, we construct deep color–magnitude ...
Sakurako Okamoto +4 more
doaj +1 more source
Asymmetrical tidal tails of open star clusters: stars crossing their cluster's prah challenge Newtonian gravitation [PDF]
, 2022 After their birth a significant fraction of all stars pass through the tidal threshold (práh) of their cluster of origin into the classical tidal tails. The asymmetry between the number of stars in the leading and trailing tails tests gravitational theory.
P. Kroupa +16 more
semanticscholar +1 more source
Extended Tidal Tails of IC 4756 Detected by Gaia EDR3 [PDF]
Astronomical Journal, 2021 We report the discovery of emerged tidal tails around open cluster IC 4756 (∼1 Gyr) based on 644 members identified from Gaia EDR3. Three-dimensional spatial positions and two-dimensional tangential velocities x,y,z,κ·μα*/ϖ,κ·μδ/ϖ are utilized to ...
X. Ye +4 more
semanticscholar +1 more source
Open Astronomy, 2021 We introduce the application of the clustering algorithm to the preliminary compiled list of probable wide pairs of co-moving stars. The main aim of such development is a possibility of unsupervised blind search of coeval loose stellar structures over ...
Sapozhnikov Sergei, Kovaleva Dana
doaj +1 more source
Active Asteroid 311P/PanSTARRS: Rotational Instability as the Origin of its Multitails?
The Astronomical Journal, 2023 The active asteroid 311P/PanSTARRS is one of the two targets of the planned Chinese asteroid exploration mission Tianwen-2. During 2013, 311P experienced several mass-loss events and exhibited multiple comet-like tails. Here we analyze the morphology and
Bin Liu +5 more
doaj +1 more source
Are Disks of Satellites Comprised of Tidal Dwarf Galaxies?
Galaxies, 2021 It was found that satellites of nearby galaxies can form flattened co-rotating structures called disks of satellites or planes of satellites. Their existence is not expected by the current galaxy formation simulations in the standard dark matter-based ...
Michal Bílek +3 more
doaj +1 more source
TIDAL TAILS OF MINOR MERGERS. II. COMPARING STAR FORMATION IN THE TIDAL TAILS OF NGC 2782 [PDF]
The Astrophysical Journal, 2013 The peculiar spiral NGC 2782 is the result of a minor merger with a mass ratio ~4:1 occurring ~200 Myr ago. This merger produced a molecular and HI rich, optically bright Eastern tail and an HI-rich, optically faint Western tail. Non-detection of CO in the Western Tail by Braine et al. (2001) suggested that star formation had not yet begun.
Knierman, Karen +7 more
openaire +2 more sources
The Extended Tidal Tails of NGC 7089 (M2) [PDF]
Astrophysical Journal, 2022 Using photometry and proper motions from Gaia Early Data Release 3, we detect a 45° long trailing stellar debris stream associated with the old, metal-poor globular cluster NGC 7089.
C. Grillmair
semanticscholar +1 more source