Results 91 to 100 of about 8,504 (230)

Dissecting Bar-induced Stellar Kinematics in Disk Galaxies: The Bisymmetric Model and Rotation Curve Modifications

The Astrophysical Journal
We analyze bars formed in N -body simulations to investigate two key aspects of stellar kinematic structure of barred galaxies: the angular distributions of the radial and azimuthal components of stellar velocities, and the impact of bars on rotation ...
Seungwon Baek, Woong-Tae Kim, Dajeong Jang, Taehyun Kim   +3 more
doaj   +1 more source

Secular Evolution and the Formation of Pseudobulges in Disk Galaxies

, 2004
We review internal processes of secular evolution in galaxy disks, concentrating on the buildup of dense central features that look like classical, merger-built bulges but that were made slowly out of disk gas. We call these pseudobulges. As an existence
Arp H, Arsenault R, Athanassoula E, Barbuy B, Bender R, Bender R, Bertin G, Bettoni D, Bica E, Bica E, Binggeli B, Binggeli B, Binney J, Binney J, Block DL, Bosma A, Bosma A, Braine J, Bresolin F, Brinchmann J, Buta R, Buta R, Carollo CM, Combes F, Combes F, Combes F, Contopoulos G, Contopoulos G, de Carvalho RR, de Jong RS, de Jong RS, de Jong RS, de Souza RE, de Vaucouleurs G, de Vaucouleurs G, Fall SM, Feltzing S, Friedli D, Friedli D, Friedli D, Gao Y, García-Barreto JA, García-Burillo S, Gerin M, Gerin M, Graham A, Hummel E, Jarvis BJ, Jogee S, Jogee S, John Kormendy, Kennicutt RC, Kormendy J, Kormendy J, Kormendy J, Lauberts A, Lauer TR, Lindblad B, Lindblad B, Lindblad PAB, Lütticke R, Martinet L, Merrifield MR, Mihalas D, Morgan WW, Möllenhoff C, Nilson P, Noguchi N, Pfenniger D, Pfenniger D, Pfenniger D, Phillips AC, Prendergast KH, Robert C. Kennicutt, Saglia RP, Sandage A, Sandage A, Sandage A, Sandage A, Schmidt AA, Scorza C, Seifert W, Sellwood JA, Shaw M, Shaw M, Shaw MA, Shen J, Sparke LS, Sérsic JL, Trager SC, van der Kruit PC, van der Kruit PC, van der Kruit PC, van der Kruit PC, van Driel W, Wozniak H   +95 more
core   +2 more sources

BVRI Surface Photometry of (S+S) Binary Galaxies. I. The data [PDF]

, 2001
We present multicolour broad band ($BVRI$) photometry for a sample of 33 spiral-spiral (S+S) binary galaxies drawn from the Karachentsev Catalogue of Isolated Pairs of Galaxies (KPG).
Avila-Reese, Avila-Reese, Baugh, Bergvall, Burstein, Cardelli, Chevalier, de Jong, Doroshenko, Dultzin-Hacyan, Elmegreen, Godwin, H. M. Hernández-Toledo, Han, Haynes, Hernández-Toledo, Holmberg, I. Puerari, Jansen, Johansson, Junqueira, Karachentsev, Kauffmann, Keel, Kennicutt, Knapen, Lacey, Larson, Laurikainen, Mayer, Metcalfe, Moore, Márquez, Márquez, Prugniel, Prugniel, Reduzzi, Reshetnikov, Roberts, Sofue, Stocke, Sulentic, Whitford, Xu, Zaritsky   +44 more
core   +2 more sources

Enhanced Radiation at Aviation Altitudes and Plasmaspheric Hiss Waves—A Time Shift Analysis

Journal of Geophysical Research: Space Physics, Volume 130, Issue 10, October 2025.
Abstract Increased radiation levels in Earth's atmosphere can present significant risks to airline pilots, passengers, and commercial space travelers. Recent findings have revealed a strong statistical link between radiation dose rates detected at aviation altitudes (>9 ${ >} 9$km) and plasmaspheric hiss wave power observed along the same magnetic ...
Homayon Aryan, Jacob Bortnik, W. Kent Tobiska, Piyush Mehta, Benjamin Hogan, Harshitha Challa   +5 more
wiley   +1 more source

Comparison of Bar Formation Mechanisms. I. Does a Tidally Induced Bar Rotate Slower than an Internally Induced Bar?

The Astrophysical Journal
Galactic bars can form via the internal bar instability or external tidal perturbations by other galaxies. We systematically compare the properties of the bars formed through the two mechanisms with a series of controlled N -body simulations that form ...
Yirui Zheng, Juntai Shen
doaj   +1 more source

Gas and Stellar Motions and Observational Signatures of Co-Rotating Spiral Arms [PDF]

, 2014
We have observed a snapshot of our N-body/Smoothed Particle Hydrodynamics simulation of a Milky Way-sized barred spiral galaxy in a similar way to how we can observe the Milky Way. The simulated galaxy shows a co-rotating spiral arm, i.e.
Cropper, Mark, Grand, Robert J. J., Hunt, Jason A. S., Kawata, Daisuke, Pasetto, Stefano   +4 more
core   +2 more sources

A Chromosome Inversion Creates a Supergene for Sex and Colour in Lake Malawi Cichlids

Molecular Ecology, Volume 34, Issue 20, October 2025.
ABSTRACT Cichlid fishes have the highest rates of evolutionary turnover of sex chromosomes among vertebrates. Many large structural polymorphisms in the radiation of cichlids in Lake Malawi are associated with sex chromosomes and may also carry adaptive variation.
Kristen A. Behrens, Soumya Jailwala, Frances E. Clark, Anne C. Meyer, Nikesh M. Kumar, Adrianus F. Konings, Reade B. Roberts, Matthew A. Conte, Jeffrey T. Streelman, Patrick T. McGrath, Thomas D. Kocher   +10 more
wiley   +1 more source

Is Messier 74 a barred spiral galaxy? [PDF]

Astronomy & Astrophysics, 2002
4 pages, 3 figures, accepted for publication in A& ...
openaire   +3 more sources

Ring Star Formation Rates in Barred and Nonbarred Galaxies

, 2010
Nonbarred ringed galaxies are relatively normal galaxies showing bright rings of star formation in spite of lacking a strong bar. This morphology is interesting because it is generally accepted that a typical ring forms when material collects near a ...
Athanassoula, Bournaud, Buta, Buta, Buta, Buta, Buta, Buta, Buta, Buta, Byrd, Combes, Contopoulos, Contopoulos, de Vaucouleurs, Donovan, E. Laurikainen, Finn, Friedli, Grouchy, Grouchy, H. Salo, Hameed, Hameed, Howarth, Kennicutt, Kohoutek, Koopmann, Madore, Mark, Martinet, McCall, R. D. Grouchy, R. J. Buta, Rautiainen, Regan, Salo, Sandage, Sandage, Schinnerer, Schwarz, Schwarz, Schwarz, Seaton, Sellwood, Shen, Sil'chenko, Tamburro, Tomita, Treuthardt, Wozniak, Wu, Wu, Yasuda, Zhang   +54 more
core   +1 more source

Arabidopsis thaliana FANCONI ANAEMIA I (FANCI) has roles in the repair of interstrand crosslinks and CRISPR‐Cas9 induced DNA double strand breaks

The Plant Journal, Volume 124, Issue 2, October 2025.
SUMMARY DNA repair is crucial for genome stability, in particular for plants which are exposed to high levels of damage arising from UV irradiation, soil pollutants and reactive oxygen species. Damage that affects both strands of the DNA duplex is harder to repair due to both the lack of a template strand and the potential for physical separation of ...
Atheer Balobaid, Wanda M. Waterworth, Sophya F. Vila Nova, Barry Causier, Vinay Sharma, Madeline R. Park, Manish K. Pandey, Christopher E. West   +7 more
wiley   +1 more source