Results 71 to 80 of about 7,844 (220)

Unveiling a Hidden Bar-like Structure in NGC 1087: Kinematic and Photometric Evidence Using MUSE/VLT, ALMA, and JWST

The Astrophysical Journal
We report a faint nonaxisymmetric structure in NGC 1087 through the use of James Webb Space Telescope Near Infrared Camera, with an associated kinematic counterpart observed as an oval distortion in the stellar velocity map, H α , and CO J = 2 → 1 ...
Carlos López-Cobá, Lihwai Lin, Sebastián F. Sánchez   +2 more
doaj   +1 more source

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

Molecular Ecology, EarlyView.
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

What determines the sizes of bars in spiral galaxies? [PDF]

Monthly Notices of the Royal Astronomical Society, 2019
ABSTRACT I use volume- and mass-limited subsamples and recently published data from the Spitzer Survey of Stellar Structure in Galaxies (S4G) to investigate how the size of bars depends on galaxy properties. The known correlation between bar semimajor axis a and galaxy stellar mass (or luminosity) is actually bimodal: for $\log \, (M_ ...
openaire   +2 more sources

The Abundance and Properties of Barred Galaxies out to z ∼ 4 Using JWST CEERS Data

The Astrophysical Journal
We present the first estimate of the observed fraction and properties of bars out to z  ∼ 4 using JWST CEERS NIRCam images. We analyze 1770 galaxies with M _⋆  > 10 ^10 M _⊙ at 0.5 ≤ z ≤ 4 and identify barred galaxies from 839 moderately inclined disk ...
Yuchen Guo, Shardha Jogee, Eden Wise, Keith Pritchett Jr., Elizabeth J. McGrath, Steven L. Finkelstein, Kartheik G. Iyer, Pablo Arrabal Haro, Micaela B. Bagley, Mark Dickinson, Jeyhan S. Kartaltepe, Anton M. Koekemoer, Casey Papovich, Nor Pirzkal, L. Y. Aaron Yung, Bren E. Backhaus, Eric F. Bell, Rachana Bhatawdekar, Yingjie Cheng, Luca Costantin, Alexander de la Vega, Mauro Giavalisco, Nimish P. Hathi, Benne W. Holwerda, Peter Kurczynski, Ray A. Lucas, Bahram Mobasher, Pablo G. Pérez-González, Fabio Pacucci   +28 more
doaj   +1 more source

The HST/ACS Coma Cluster Survey. VIII. Barred Disk Galaxies In The Core Of The Coma Cluster [PDF]

, 2012
We use high-resolution (similar to 0.'' 1) F814W Advanced Camera for Surveys (ACS) images from the Hubble Space Telescope ACS Treasury survey of the Coma cluster at z similar to 0.02 to study bars in massive disk galaxies (S0s), as well as low-mass dwarf
Balcells, Marc, Carter, David, den Brok, Mark, Erwin, Peter, Ferguson, Henry C., Goudfrooij, Paul, Graham, Alister W., Guzman, Rafael, Hammer, Derek, Hoyos, Carlos, Jogee, Shardha, Kleijn, Gus V., Marinova, Irina, Mobasher, Bahram, Mouhcine, Mustapha, Peletier, Reynier F., Peng, Eric W., Trentham, Neil, Weinzirl, Tim   +18 more
core   +1 more source

Thermotolerant class A acid phosphatase active across broad pH range and diverse substrates

Protein Science, Volume 34, Issue 9, September 2025.
Abstract M2‐32 is a non‐specific acid phosphatase with a rare ability to function across a broad pH range (3.5–8.5). Analysis using SWISS‐PROT Prf Profiles classifies it as a class A acid phosphatase (Z‐score: 78.97), sharing 50%–60% sequence similarity with enzymes such as PhoC and PhoN.
Maria‐Isabel Recio, José A. Gavira, Jesús de La Torre, Mario Cano‐Muñoz, Sergio Martínez‐Rodriguez, Abdelali Daddaoua, Estrella Duque, Juan L. Ramos   +7 more
wiley   +1 more source

CO OBSERVATIONS OF BARRED SPIRAL GALAXIES [PDF]

Journal of The Korean Astronomical Society, 2006
We present the results of a highly sensitive ( mK rms) survey toward the central parts of 22 barred spiral galaxies in line using the NRAO 12m telescope at Kitt Peak. Seven of the target galaxies were detected in CO; NGC 3686 has been detected with CO for the first time. We estimated central CO fluxes of and molecular gas masses of for those galaxies.
Hyo-Ryoung Kim, Min Young Lee, Myung-Hyun Rhee, Chang-Won Lee   +3 more
openaire   +2 more sources

The Impacts of Bars, Spirals, and Bulge Size on Gas-phase Metallicity Gradients in MaNGA Galaxies

The Astrophysical Journal
As galaxies evolve over time, the orbits of their constituent stars are expected to change in size and shape, moving stars away from their birth radius. Radial gas flows are also expected. Spiral arms and bars in galaxies are predicted to help drive this
M. E. Wisz, Karen L. Masters, Kathryne J. Daniel, David V. Stark, Francesco Belfiore   +4 more
doaj   +1 more source

Stellar Populations, Bars and Secular Evolution in Late-Type Galaxies [PDF]

, 2000
We have done a robust statistical analysis of UBV color profiles of 257 Sbc barred and unbarred galaxies. We found that there is an excess of barred galaxies among the objects with null or positive (bluish inward) color gradients, which seems to indicate
Corsini, Enrico Maria, Dos Anjos, S., Funes, José G., Gadotti, D.A.   +3 more
core   +1 more source

Density Waves Inside Inner Lindblad Resonance: Nuclear Spirals in Disk Galaxies [PDF]

, 1999
We analyze formation of grand-design two-arm spiral structure in the nuclear regions of disk galaxies. Such morphology has been recently detected in a number of objects using high-resolution near-infrared observations.
Athanassoula E., Buta R., Contopoulos G., Englmaier P., Ferrers N. M., Isaac Shlosman, Mulder W. A., Peter Englmaier, Schwarz M. P., van Albada T. S.   +9 more
core   +2 more sources