Results 61 to 70 of about 8,619 (233)

Epidemiology and Genetics of Rheumatic Diseases Suggest a Constant Rate of DNA Damage as Underlying Cause

Immunology, EarlyView.
A constant rate of DNA damage that is not perfectly repaired will cause a constant rate of DNA mutations. The chance of mutation will increase if DNA is prone to damage, such as occurs in somatic hypermutation (SHM) hotspots and GC‐rich DNA. Thus, if one mutation‐prone DNA site drives disease, the age of onset of disease and degree of penetrance should
Piet C. de Groen
wiley   +1 more source

Spiral Structure and Galaxy Environment

, 2002
Among 330 normal spirals of types Sa-Sc the fraction of objects exhibiting ``ring'', ``intermediate'' and ``spiral'' arm varieties does not correlated with environment.
Buta R., Buta R., de Vaucouleurs S., Sidney van den Bergh   +3 more
core   +2 more sources

Nobeyama CO Atlas of Nearby Spiral Galaxies: Distribution of Molecular Gas in Barred and Nonbarred Spiral Galaxies [PDF]

Publications of the Astronomical Society of Japan, 2007
Abstract The data from a CO ($J$ = 1–0) mapping survey of 40 nearby spiral galaxies, performed with the Nobeyama 45 m telescope, are presented. The criteria of the sample selection were: (1) RC3 morphological type ranging from Sa to Scd, (2) distance of less than 25 Mpc, (3) inclination angle less than 79$^{\circ}$ (RC3), (4) flux at 100$
Kuno, N., Sato, N., Nakanishi, H., Hirota, A., Tosaki, T., Shioya, Y., Sorai, K., Nakai, N., Nishiyama, K., Vila-Vilaro, B.   +9 more
openaire   +2 more sources

Noble gases and nitrogen in material from asteroid Bennu

Meteoritics &Planetary Science, EarlyView.
Abstract We report the elemental and isotopic abundances of all stable noble gases (helium, neon, argon, krypton, and xenon) in eight particles from asteroid Bennu returned by NASA's OSIRIS‐REx mission. We also report nitrogen abundances and isotopic ratios that were analyzed alongside neon and argon in four additional Bennu particles.
B. Marty, L. Zimmermann, E. Füri, D. V. Bekaert, J. J. Barnes, A. N. Nguyen, H. C. Connolly, D. S. Lauretta   +7 more
wiley   +1 more source

Bar Diagnostics in Edge-On Spiral Galaxies. I. The Periodic Orbits Approach

, 1999
We develop diagnostics to detect the presence and orientation of a bar in an edge-on disk, using its kinematical signature in the position-velocity diagram (PVD) of a spiral galaxy observed edge-on.
Athanassoula E., Athanassoula E., Athanassoula E., Athanassoula E., Binney J., Bureau M., Combes F., Combes F., Contopoulos G., Contopoulos G., Contopoulos G., de Carvalho R. R., E. Athanassoula, Ferrers N. M., Fux R., Kalnajs A. J., Kuzmin G., M. Bureau, Mulder W. A., Papayannopoulos T., Pfenniger D., Schwarz M. P., Sparke L. S., Teuben P., van Albada T. S., Weiner B. J., Wozniak H.   +26 more
core   +1 more source

Comparison of Bar Formation Mechanisms. II. Does a Tidally Induced Bar Grow Faster than an Internally Developed Bar?

The Astrophysical Journal
Bar structures can form internally due to the instability of their host galaxies or externally due to perturbations from other galaxies. We systematically quantify the growth timescales ( τ _bar ) of bars formed through these two mechanisms with a series
Yirui Zheng, Juntai Shen, Xufen Wu, Bin-Hui Chen   +3 more
doaj   +1 more source

Quantum GraviElectro Dynamics

Annalen der Physik, Volume 538, Issue 1, January 2026.
The BRST invariant Lagrangian of the gravitationally interacting U(1)$U(1)$ gauge theory, namely the Quantum GraviElectro Dynamics (QGED). The Yan–Mills theory with the Hilbert–Einstein gravitational Lagrangian, namely the Yang–Mills–Utiyama (YMU) theory, is defined and quantised using the standard procedure. The theory is perturbatively renormalisable,
Yoshimasa Kurihara
wiley   +1 more source

Bar-driven Transport of Molecular Gas to Galactic Centers and Its Consequences [PDF]

, 1999
We study the characteristics of molecular gas in the central regions of spiral galaxies on the basis of our CO(J=1-0) imaging survey of 20 nearby spiral galaxies using the NRO and OVRO millimeter arrays. Condensations of molecular gas at galactic centers
Arimoto N., Bloemen J. B. G. M., Buat V., Casoli F., Dahmen G., Friedli D., Friedli D., Hawarden T. G., Huang J. H., Hummel E., K. Sakamoto, N. Z. Scoville, Noguchi M., S. Ishizuki, S. K. Okumura, Safronov V. S., Sakamoto K., Vila-Costas M. B., Wada K.   +18 more
core   +3 more sources

Dynamically Driven Evolution of Molecular Gas in the Barred Spiral Galaxy M83 Traced by CO J = 2–1/1–0 Line Ratio Variations

The Astrophysical Journal
We show the variations of the CO J = 2–1/1–0 line ratio ( R _21/10 ) across the barred spiral galaxy M83, using the 46 pc resolution data from the Atacama Large Millimeter/submillimeter Array. The R _21/10 map clearly evidences the systematic large-scale
Jin Koda, Fumi Egusa, Akihiko Hirota, Amanda M Lee, Tsuyoshi Sawada, Fumiya Maeda   +5 more
doaj   +1 more source

Enhanced Radiation Exposure of Airline Crew and Passengers During the May 2024 Geomagnetic Storm

Journal of Geophysical Research: Space Physics, Volume 131, Issue 1, January 2026.
Abstract Enhanced radiation at aviation altitudes is a concern for flight crew and passengers. During space weather events, solar flares and coronal mass ejection (CME) driven shocks are sources of energetic particles that can reach Earth's near‐space environment and interact with its magnetic field and atmosphere.
Homayon Aryan, Jacob Bortnik, W. Kent Tobiska, Piyush Mehta, Benjamin Hogan, Rashmi Siddalingappa, Harshitha Challa   +6 more
wiley   +1 more source