Results 21 to 30 of about 8,660 (167)

Perturbed precessing ellipses as the building blocks of spiral arms in a barred galaxy with two pattern speeds [PDF]

Astronomy & Astrophysics, 2022
Observations and simulations of barred spiral galaxies have shown that, in general, the spiral arms rotate at a different pattern speed to that of the bar. The main conclusion from the bibliography is that the bar rotates faster than the spiral arms with
M. Harsoula, C.Efthymiopoulos, G. Contopoulos, A. Tzemos   +3 more
semanticscholar   +1 more source

Estimation of the Parameters of the Spiral Pattern in the Galaxy Based on a Sample of Classical Cepheids [PDF]

Astronomy letters, 2022
We consider a sample of Galactic classical Cepheids with highly accurate estimates of their distances taken from Skowron et al., where they were determined based on the period–luminosity relation.
V. Bobylev
semanticscholar   +1 more source

PHANGS–JWST First Results: Multiwavelength View of Feedback-driven Bubbles (the Phantom Voids) across NGC 628

The Astrophysical Journal Letters, 2023
We present a high-resolution view of bubbles within the Phantom Galaxy (NGC 628), a nearby (∼10 Mpc), star-forming (∼2 M _⊙ yr ^−1 ), face-on ( i ∼ 9°) grand-design spiral galaxy.
Ashley. T. Barnes, Elizabeth J. Watkins, Sharon E. Meidt, Kathryn Kreckel, Mattia C. Sormani, Robin G. Treß, Simon C. O. Glover, Frank Bigiel, Rupali Chandar, Eric Emsellem, Janice C. Lee, Adam K. Leroy, Karin M. Sandstrom, Eva Schinnerer, Erik Rosolowsky, Francesco Belfiore, Guillermo A. Blanc, Médéric Boquien, Jakob den Brok, Yixian Cao, Mélanie Chevance, Daniel A. Dale, Oleg V. Egorov, Cosima Eibensteiner, Kathryn Grasha, Brent Groves, Hamid Hassani, Jonathan D. Henshaw, Sarah Jeffreson, María J. Jiménez-Donaire, Benjamin W. Keller, Ralf S. Klessen, Eric W. Koch, J. M. Diederik Kruijssen, Kirsten L. Larson, Jing Li, Daizhong Liu, Laura A. Lopez, Eric J. Murphy, Lukas Neumann, Jérôme Pety, Francesca Pinna, Miguel Querejeta, Florent Renaud, Toshiki Saito, Sumit K. Sarbadhicary, Amy Sardone, Rowan J. Smith, Sophia K. Stuber, Jiayi Sun, David A. Thilker, Antonio Usero, Bradley C. Whitmore, Thomas G. Williams   +53 more
doaj   +1 more source

PHANGS–JWST First Results: A Combined HST and JWST Analysis of the Nuclear Star Cluster in NGC 628

The Astrophysical Journal Letters, 2023
We combine archival Hubble Space Telescope and new James Webb Space Telescope imaging data covering the ultraviolet to mid-infrared regime to morphologically analyze the nuclear star cluster (NSC) of NGC 628, a grand-design spiral galaxy.
Nils Hoyer, Francesca Pinna, Albrecht W. H. Kamlah, Francisco Nogueras-Lara, Anja Feldmeier-Krause, Nadine Neumayer, Mattia C. Sormani, Médéric Boquien, Eric Emsellem, Anil C. Seth, Ralf S. Klessen, Thomas G. Williams, Eva Schinnerer, Ashley. T. Barnes, Adam K. Leroy, Silvia Bonoli, J. M. Diederik Kruijssen, Justus Neumann, Patricia Sánchez-Blázquez, Daniel A. Dale, Elizabeth J. Watkins, David A. Thilker, Erik Rosolowsky, Frank Bigiel, Kathryn Grasha, Oleg V. Egorov, Daizhong Liu, Karin M. Sandstrom, Kirsten L. Larson, Guillermo A. Blanc, Hamid Hassani   +30 more
doaj   +1 more source

Synthetic HI observations of a simulated spiral galaxy [PDF]

, 2010
Using the Torus radiative transfer code we produce synthetic observations of the 21 cm neutral hydrogen line from an SPH simulation of a spiral galaxy. The SPH representation of the galaxy is mapped onto an AMR grid, and a ray tracing method is used to ...
Acreman, Adler, Baba, Bergin, Braun, Chakrabarti, Chemin, Corbelli, Cox, De Avillez, Dib, Dib, Dobbs, Dobbs, Dobbs, Dobbs, Dobbs, Douglas, Douglas, Efremov, Engargiola, Gibson, Glover, Gómez, Harries, Heiles, Heyer, Kim, Lucy, Narayanan, Pinte, Price, Putman, Rhode, Roberts, Rohlfs, Rosolowsky, Rots, Rundle, Shetty, Stil, Tamburro, Tasker, Taylor, Visser, Wada, Wada, Wada, Wada, Walter, Wolfire   +50 more
core   +1 more source

A SOFIA Survey of [C ii] in the Galaxy M51. II. [C ii] and CO Kinematics across the Spiral Arms [PDF]

Astrophysical Journal, 2020
We present the first complete, velocity-resolved [C ii] 158 μm image of the M51 grand-design spiral galaxy, observed with the upgraded German Receiver for Astronomy at Terahertz frequencies instrument on the Stratospheric Observatory for Infrared ...
J. Pineda, J. Stutzki, C. Buchbender, J. Koda, C. Fischer, P. Goldsmith, S. Glover, R. Klessen, C. Kramer, B. Mookerjea, Rowan J. Smith, R. Tress, M. Ziebart   +12 more
semanticscholar   +1 more source

A multiwavelength study of spiral structure in galaxies. II. Spiral arms in deep optical observations [PDF]

Monthly notices of the Royal Astronomical Society, 2023
In this paper, we look to analyse the spiral features of grand-design, multiarmed, and flocculent spiral galaxies using deep optical imaging from DESI Legacy Imaging Surveys.
A. Mosenkov, A. D. Panasyuk, Savanah K. Turner, Crystal-Lynn Bartier, M. Skryabina, A. A. Marchuk, S. S. Savchenko, Jakob Bergstedt, V. Reshetnikov, I. Chugunov   +9 more
semanticscholar   +1 more source

Evidence for small halos in grand design spiral galaxies

The Astrophysical Journal, 1990
Les courbes de rotation de 41 galaxies spirales de differents types sont comparees. Il est montre que les galaxies ayant deux bras longs et symetriques tendent a avoir des courbes de rotation exterieures tombantes alors que les galaxies ayant des bras multiples ou des bras floconneux courts ont plutot des courbes de rotation presques plates ou s ...
Debra Meloy Elmegreen, Bruce G. Elmegreen   +1 more
openaire   +1 more source

A high resolution CO map of the inner region of M51 [PDF]

, 1998
M51, the Whirlpool Galaxy, at a distance of ≈ 9,6 Mpc and a systemic velocity of 465 km s^(−1), is the closest “Grand Design” spiral galaxy. Its low inclination (20°) makes it an excellent target for structural studies, e.g.
Aalto, S., Hüttemeister, S., Scoville, N., Thaddeus, P.   +3 more
core   +1 more source

Uncovering Spiral Structure in Flocculent Galaxies [PDF]

, 1996
We present K'(2.1 micron) observations of four nearby flocculent spirals, which clearly show low-level spiral structure and suggest that kiloparsec-scale spiral structure is more prevalent in flocculent spirals than previously supposed.
Adamson A. J., Block D. L., Braine J., Casali M., Elmegreen B. G., Heckman T. M., Michele D. Thornley   +6 more
core   +2 more sources