Results 21 to 30 of about 1,112 (128)

Grand Design vs. Multi-Armed Spiral Galaxies: Dependence on Galaxy Structure [PDF]

We developed an algorithm to use Galaxy Zoo 3D spiral arm masks produced by citizen scientist volunteers to semi-automatically classify spiral galaxies as either multi-armed or grand design spirals. Our final sample consists of 299 multi-armed and 245 grand design galaxies.
Beverly J. Smith, Matthew Watson, Mark L. Giroux, Curtis Struck   +3 more
openalex   +3 more sources

A panchromatic spatially resolved analysis of nearby galaxies – II. The main sequence – gas relation at sub-kpc scale in grand-design spirals [PDF]

Monthly Notices of the Royal Astronomical Society, 2020
ABSTRACT In this work, we analyse the connection between gas availability and the position of a region with respect to the spatially resolved main-sequence (MS) relation. Following the procedure presented in Enia et al. (2020), for a sample of five face-on, grand design spiral galaxies located on the MS we obtain estimates of stellar ...
L. Morselli, G. Rodighiero, Andrea Enia, E. Corbelli, V. Casasola, L. Rodríguez-Muñoz, A. Renzini, Sandro Tacchella, Ivano Baronchelli, S. Bianchi, P. Cassata, A. Franceschini, C. Mancini, M. Negrello, P. Popesso, Michael Romano   +15 more
openalex   +9 more sources

Analyzing the cosmic architecture in the vicinity of Grand-design and Flocculent spiral galaxies with Local Geometric Index

, 2023
We explore the environment of 351 grand-design and 541 flocculent spiral galaxies recently identified employing convolutional neural networks from the $17^{th}$ data release of Sloan Digital Sky Survey. We introduce a novel estimator called the Local Geometric Index to quantify the morphology of the local environment of these 892 spirals.
Suman Sarkar, Ganesh Narayanan, Arunima Banerjee   +2 more
openalex   +4 more sources

A Cloud-Scale View of the Molecular Gas Disk in the Whirlpool Galaxy and Beyond [PDF]

EPJ Web of Conferences, 2022
The nearby galaxy M51 (also known as the Whirlpool galaxy) hosts an iconic grand-design spiral pattern and both IRAM facilities conducted the first cloud-scale (∼50 pc resolution) survey of the molecular gas reservoir across a the disk of a massive star ...
Schinnerer Eva, Pety Jérôme, Bešlić Ivana, Eibensteiner Cosima, Stuber Sophia, Leroy Adam, Hughes Annie, Usero Antonio, Bigiel Frank   +8 more
doaj   +1 more source

The detection of spiral arm modulation in the stellar disk of an optically flocculent and an optically grand design galaxy

, 2000
Two dimensional Fourier spectra of near-infrared images of galaxies provide a powerful diagnostic tool for the detection of spiral arm modulation in stellar disks. Spiral arm modulation may be understood in terms of interference patterns of outgoing and incoming density wave packets or modes.
I. Puerari, David L. Block, Bruce G. Elmegreen, J. A. Frogel, Paul B. Eskridge   +4 more
  +6 more sources

Dust Emission in Galaxies at Millimeter Wavelengths: Cooling of star forming regions in NGC6946 [PDF]

EPJ Web of Conferences, 2022
Interstellar dust plays an important role in the formation of molecular gas and the heating and cooling of the interstellar medium. The spatial distribution of the mm-wavelength dust emission from galaxies is largely unexplored. The NIKA2 Guaranteed Time
Ejlali G., Adam R., Ade P., Ajeddig H., André P., Artis E., Aussel H., Beelen A., Benoît A., Berta S., Bing L., Bourrion O., Calvo M., Catalano A., de Looze I., De Petris M., Désert F.-X., Doyle S., Driessen E.F. C., Galametz M., Galliano F., Gomez A., Goupy J., Jones A.P., Hughes A., Katsioli S., Kéruzoré F., Kramer C., Ladjelate B., Lagache G., Leclercq S., Lestrade J.-F., Macías-Pérez J.-F., Madden S.C., Maury A., Mauskopf P., Mayet F., Monfardini A., Muñoz-Echeverría M., Nersesian A., Perotto L., Pisano G., Ponthieu N., Revéret V., Rigby A.J., Ritacco A., Romero C., Roussel H., Ruppin F., Schuster K., Shu S., Sievers A., Smith M. W. S. L., Tabatabaei F. S., Tucker C., Xilouris E.M., Zylka R.   +56 more
doaj   +1 more source

Molecules in galaxies. V - CO observations of flocculent and grand-design spirals

The Astrophysical Journal, 1987
New carbon monoxide (1-0) observations of 29 spiral galaxies are presented and combined with previously existing data for 74 galaxies in order to study the dependence of the average CO surface brightness on the spiral-arm class. The total sample shows no significant correlation between the CO surface brightness and the presence or absence of grand ...
A. A. Stark, Bruce G. Elmegreen, D. Chance   +2 more
openalex   +3 more sources

A grand-design spiral galaxy 1.5 billion years after the Big Bang with JWST [PDF]

We report the discovery of a large ($\sim 10$ kpc diameter), massive ($\log(M_\star/M_\odot) = 10.15^{+0.01}_{-0.01}$), grand-design spiral galaxy with photometric redshift $z_{\text{phot}} = 4.03$ in the UNCOVER and Medium Band Mega Science surveys with JWST. This is the highest redshift spiral galaxy discovered with JWST so far.
Rashi Jain, Yogesh Wadadekar
openalex   +3 more sources

J0107a: A Barred Spiral Dusty Star-forming Galaxy at z = 2.467 [PDF]

Astrophysical Journal Letters, 2023
Dusty star-forming galaxies (DSFGs) are among the most massive and active star-forming galaxies during the cosmic noon. Theoretical studies have proposed various formation mechanisms of DSFGs, including major merger-driven starbursts and secular star ...
Shuo Huang, R. Kawabe, K. Kohno, T. Saito, Shoichiro Mizukoshi, D. Iono, T. Michiyama, Y. Tamura, Christopher C. Hayward, H. Umehata   +9 more
semanticscholar   +1 more source

Spiral arm amplitude variations and pattern speeds in the grand design galaxies M51, M81, and M100

The Astrophysical Journal, 1989
In the modal theory of galactic spiral structure, the amplitude of a prominent two-arm spiral pattern should oscillate slightly with galactocentric distance because of an interference between the outward and inward propagating waves. In the stellar dynamical theory, the spiral arm amplitudes should oscillate because of differential crowding near and ...
Bruce G. Elmegreen, P. E. Seiden, D. M. Elmegreen   +2 more
openalex   +3 more sources