Results 31 to 40 of about 12,684 (325)
Chemo-kinematics of the Milky Way spiral arms and bar resonances: Connection to ridges and moving groups in the Solar vicinity [PDF]
Astronomy & Astrophysics, 2021 Using of a new N-body simulation, as well as Gaia DR2/EDR3 data complemented by data from the Galah, APOGEE, LAMOST surveys, we explore the possible link between the MW spiral arms, RVphi-ridges and moving groups in local UV space.
S. Khoperskov, O. Gerhard
semanticscholar +1 more source
On the Formation of Spiral Arms in Dwarf Galaxies [PDF]
Astronomy Reports, 2021 Spiral structure (both flocculent and Grand Design types) is very rarely observed in dwarf galaxies because the formation of spiral arms requires special conditions. In this work we analyze the sample of about 40 dS-galaxies found by scanning by eye the images of late-type galaxies with $m_B<15^m$ and $M_B>-18^m$ and photometric diameter $D_{25 ...
Zasov, Anatoly V. +3 more
openaire +2 more sources
A Comparison of the Simulations and Observations for a Nearby Spiral Arm
Frontiers in Astronomy and Space Sciences, 2021 The analysis is focused on the ability of galactic open clusters to trace the spiral arms, based on the recent data releases from Gaia. For this, a simple 1D description of the motion of spiral arms and clusters is introduced.
Martin Piecka, Ernst Paunzen
doaj +1 more source
The bar and spiral arms in the Milky Way: structure and kinematics [PDF]
Research in Astronomy and Astrophysics, 2020 The Milky Way is a spiral galaxy with the Schechter characteristic luminosity L*, thus an important anchor point of the Hubble sequence of all spiral galaxies. Yet the true appearance of the Milky Way has remained elusive for centuries.
Juntai Shen, Xing-wu Zheng
semanticscholar +1 more source
Large-scale CO Spiral Arms and Complex Kinematics Associated with the T Tauri Star RU Lup [PDF]
Astrophysical Journal, 2020 While protoplanetary disks often appear to be compact and well organized in millimeter continuum emission, CO spectral line observations are increasingly revealing complex behavior at large distances from the host star.
Jane Huang +11 more
semanticscholar +1 more source
The Spiral Structure in the Solar Neighborhood
Frontiers in Astronomy and Space Sciences, 2021 The spiral structure in the solar neighborhood is an important issue in astronomy. In the past few years, there has been significant progress in observation. The distances for a large number of good spiral tracers, i.e., giant molecular clouds, high-mass
L. G. Hou
doaj +1 more source
Are the spiral arms in the MWC 758 protoplanetary disc driven by a companion inside the cavity? [PDF]
, 2020 Spiral arms in protoplanetary discs are thought to be linked to the presence of companions. We test the hypothesis that the double spiral arm morphology observed in the transition disc MWC 758 can be generated by an $\approx 10$ M$_{\rm Jup}$ companion ...
J. Calcino +6 more
semanticscholar +1 more source
The Identification of a Dusty Multiarm Spiral Galaxy at z = 3.06 with JWST and ALMA
The Astrophysical Journal Letters, 2022 Spiral arms serve crucial purposes in star formation and galaxy evolution. In this paper, we report the identification of “A2744-DSG- z 3,” a dusty, multiarm spiral galaxy at z = 3.059 using the James Webb Space Telescope (JWST) NIRISS imaging and grism ...
Yunjing Wu +15 more
doaj +1 more source
An Updated View of the Milky Way from Maser Astrometry
Universe, 2022 Astrometric observations of maser sources in the Milky Way, using the Very Long Baseline Interferometry (VLBI) technique, have been exploited to determine the spiral structure of our Galaxy. Several major spiral arms have now been pinpointed in the first
Katharina Immer, Kazi L. J. Rygl
doaj +1 more source
Mass extinction and the structure of the milky way [PDF]
Serbian Astronomical Journal, 2013 We use the most up-to-date Milky Way model and solar orbit data in order to test the hypothesis that the Sun's galactic spiral arm crossings cause mass extinction events on Earth. To do this, we created a new model of the Milky Way's spiral arms
Filipović M.D. +4 more
doaj +1 more source