نتایج جستجو برای: galaxies individual andromeda i
تعداد نتایج: 1476211 فیلتر نتایج به سال:
Although speculations of an interaction between galaxies and the ICM date back more than thirty years, the impact and importance of a possible interaction have long remained elusive. In recent years the situation has completely changed. A wealth of data and detailed hydrodynamical simulations have appeared that show the effects of interactions. Single dish observations show that cluster galaxie...
We present new measurments of the gas-phase C/O abundance ratio in both the NW and SE components of the extremely metal-poor dwarf irregular galaxy I Zw 18, based on ultraviolet spectroscopy of the two H II regions using the Faint Object Spectrograph on the Hubble Space Telescope. We determine values of log C/O = −0.63±0.10 for the NW component and log C/O = −0.56±0.09 for the SE component. In ...
زمینه: عروس دریایی زهرآگین کاسیوپیا آندرومدا (Cassiopea andromeda) با نماتوسیت‌های خود می‌تواند آسیبها و اثرات توکسیکولوژیک و بیولوژیک مختلفی را ایجاد نماید. آنزیم های فسفولیپاز A2 (PLA2) توکسیک بوده و موجب القاء اثرات فارماکولوژیک متنوع شامل نوروتوکسیسیتی، میوتوکسیسیتی و فعالیتهای ضد انعقادی می‌گردند. مطالعه حاضر با هدف بررسی فعالیت فسفولیپاز A2 زهر خامC. andromeda در شرایط in vitroصورت پذی...
We describe the properties of the Lyα forest in the column density range NH I ≥ 2× 10 12 cm based on 1056 lines in the wavelength range 4300− 5100 Å measured in extremely high S/N, R = 36, 000 spectra of four quasars. The column density distribution is well described by a −1.5 power law to 2×10 cm, below which limit confusion becomes too severe to measure a spectrum of individual clouds. The di...
Diffuse γ-ray radiation in galaxies is produced by cosmic ray interactions with the interstellar medium. With the completion of EGRET observations, the only extragalactic object from which there has been a positive detection of diffuse γ-ray emission is the Large Magellanic Cloud. We systematically estimate the expected diffuse γ-ray flux from Local Group galaxies, and determine their detectabi...
We present new, low-frequency images of the powerful FR I radio galaxy Hydra A (3C 218). Images were made with the Very Large Array (VLA) at frequencies of 1415, 330, and 74 MHz, with resolutions on the order of 20. The morphology of the source is seen to be more complex and even larger than previously known, and extends nearly 8 (530 kpc) in a North-South direction. The southern lobe is bent t...
We report a weak line at 3.52±0.02 keV in x-ray spectra of the Andromeda galaxy and the Perseus galaxy cluster observed by the metal-oxide-silicon (MOS) and p-n (PN) CCD cameras of the XMM-Newton telescope. This line is not known as an atomic line in the spectra of galaxies or clusters. It becomes stronger towards the centers of the objects; is stronger for Perseus than for M31; is absent in t...
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