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Wednesday, July 22, 2020 | History

2 edition of X-rays from the radio halo of Virgo A = M87 found in the catalog.

X-rays from the radio halo of Virgo A = M87

# X-rays from the radio halo of Virgo A = M87

## results.

Published by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, DC, Springfield, Va .
Written in English

Subjects:
• Compton effect.,
• Photons.,
• Virgo galactic cluster.,
• X rays.

• Edition Notes

The Physical Object ID Numbers Series NASA contractor report -- NASA CR-176303. Contributions United States. National Aeronautics and Space Administration. Format Microform Pagination 1 v. Open Library OL18082675M

Galaxy Evolution in the Virgo Cluster Bernd Vollmer Figure 1: Left: section of the GHz Stockert continuum survey showing a part of the North Polar Spur close to the Virgo cluster with Virgo A or M87 at its center. The 10 10 ﬁeld observed with the Effelsberg telescope is . Messier 87 (M87; também chamada de Virgo A ou NGC ) é uma galáxia elíptica supergigante localizada na constelação de Virgem, uma das mais massivas do Universo local. Ela possui uma grande população de aglomerados globulares e um distinto jato de plasma energético que se origina em seu núcleo e estende-se por pelo menos 4,9 mil anos-luz, viajando em uma velocidade relativista.

Messier 87 (also known as M87, Virgo A or NGC ) is a supergiant elliptical was discovered in by the French astronomer Charles Messier, who catalogued it as a nebulous second brightest galaxy within the northern Virgo Cluster, it is about million parsecs ( million light-years) from Earth.. Unlike a disk-shaped spiral galaxy, Messier 87 has no distinctive. Non-thermal hard X-ray emission from the radio halo of M87 R. Walter The nucleus and the kpc-scale jet The keV spectrum of the unresolved X-ray source in the nucleus of M87 has a ﬂux density of 10 13 erg s 1keV 1 (1 keV) and exhibits a soft spectrum with a photon index G = (16).Author: Roland Walter.

In X-rays, M87 reveals evidence for a series of outbursts from its central black hole. The loops and bubbles in the hot X-ray-emitting gas are relics of small outbursts from close to the black hole. We compare a very deep X-ray image of M87, at the center of the Virgo Cluster, to high-quality optical images of the low excitation emission-line gas in the.

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X-rays from the radio halo of Virgo A = M87 Abstract The purpose of this study is to investigate in more detail the associated X-ray and radio emission in the Virgo A halo discovered by SGF. The nuclear starburst, flat X-ray spectrum spiral galaxy NGC shows a one-sided jet in radio and X-rays, extending out to ( kpc) to the SW of the galaxy.

This book gives both a comprehensive and detailed account of the current theoretical and observational investigations of the radio galaxy M87 in the Virgo cluster. A number of introductory chapters provide a general overview, which makes the book accessible also to non-specialists in the field.

We report performance verification observations of the giant elliptical galaxy M87 in the Virgo Cluster with the MOS, pn, and optical monitor instruments on board of XMM-Newton. With the energy sensitive imaging instruments MOS and pn we obtain the first spatially constrained X-ray spectra of the nucleus and the jet of the galaxy.

The good photon statistics of the pn and MOS allow a detailed. ROSAT X-ray images and spectra of the inner parts of the Virgo cluster around M87 are presented and compared with a new deep radio map. Apart from the emission peaked on M87, a roughly linear structure, noted previously by Feigelson et al.

using Einstein Observatory data and correlated with the outer radio halo, is by: Young cavities in the X-ray-emitting hot gas in galaxy clusters are often filled with radio synchrotron emission from cosmic rays. However, in the M87/Virgo cluster, where cavities are less prominent, X-ray observations show a 30 kpc long nearly radial filament of relatively cooler gas that projects from the cluster core into a large (40 kpc) radio lobe.

The galaxy, and its radio halo, sit in a large atmosphere of hot, X-ray loud gas (as detected by the EINSTEIN and ROSAT satellites). From this image we can see that the radio halo is a bubble, with a well-defined outer edge, sitting inside the X-ray emitting atmosphere.

Polarization measurements of diffuse Galactic radio emission at, and MHz have been carried out in the direction of the North Celestial Pole, North Galactic Pole, one. Nature of the Halo The M87 radio halo, Virgo A, looks like two bubbles which are supported by the energy of poorly collimated outﬂows from the core.

Three observations support this idea. First, the radio halo is the same size at all observed frequencies, from 74 and MHz (Kassim et al ), to GHz (Rottmann et al ).

able to reproduce qualitatively both the radio and X–ray morphologies observed in the central region surrounding the M87 galaxy. Radio and X–ray morphology There is a long history of M87 radio halo ob-servations, starting with Mills () shortly after the initial discovery of the radio source Virgo A (Bolton, Stanley and Slee ).

“The giant radio galaxy M87, well studied from radio to X-ray energies, is located in the Virgo cluster of galaxies at a distance of 16 Mpc (redshift z=). M87 has been observed with the HEGRA stereoscopic system of five Cherenkov telescopes in the years and for more than 80 h.

Since M87 and the core of the Virgo Cluster are nearby ( Mpc; Tonry ), they have a large angular size on the sky ( ¼ 77 pc) and present an ideal system in which to study the nature of by: Get this from a library.

X-rays from the radio halo of Virgo A = M results. [United States. National Aeronautics and Space Administration.;]. The nearby radio galaxy M87 (Virgo A) is studied with the Einstein X-ray Observatory and the VLA to investigate possible inverse Compton X-ray emission from the 'radio halo'.

An asymmetrical X-ray structure is superposed on the dominant symmetrical emission due to the hot interstellar gas, consisting of broad ridges extending about arcmin. M87 was identified with the radio source Virgo A by W. Baade and R. Minkowski in Ina weaker radio halo was found by J.E.

Baldwin and F.G. Smith of Cambridge. The galaxy has a spectacular jet which is better seen on short exposure photographs as shown in Figure This is a directional beam of relativistic+ plasma issuing from the.

M87/Virgo. Virgo is the nearest rich cluster to our galaxy. The cluster is quite irregular and spiral rich (de Vaucouleurs, ; Abell, ; Bautz and Morgan, ), although the X-ray emission comes from an elliptical-rich core surrounding the galaxy M87 ().M87 is classified as a peculiar elliptical galaxy.

It has fairly extended optical emission (de Vaucouleurs and Nieto, ), but. Get this from a library. X-ray inverse Compton emission from the radio halo of M final technical report: November 1, - Octo [Eric C Feigelson; United States.

National Aeronautics and Space Administration.]. Messier 87 (also known as M87, Virgo A or NGC ) is a giant w:elliptical galaxy is the largest and brightest galaxy within the northern w:Virgo Cluster, located about 55 million light years away.

The galaxy also contains a notable w:active galactic nucleus that is a strong source of multiwavelength radiation, particularly w:radio waves. Constellation: Virgo. Abstract.

M87 (Virgo A, 3C), has been observed at 5 GHz with the Cambridge One-Mile telescope, with a resolution of |$^{\prime\prime} \times 28^{\prime\prime}$| arc. These observations did not include the extensive halo, but showed that the central region of the source consists of at least three by: M87 was also identified with the strong radio source Virgo A (for the brightest radio source in the constellation Virgo), by W.

Baade and R. Minkowski in Ina weaker radio halo was found by J.E. Baldwin and F.G. Smith of Cambridge. The French astronomer Charles Messier discovered M87 inand cataloged it as a nebula. M87 is about million parsecs (53 million light-years) from Earth and is the second-brightest galaxy within the northern Virgo Cluster, having many satellite galaxies.

Unlike a disk-shaped spiral galaxy, Constellation: Virgo.M87 (NGCVirgo A) is a galaxy situated in the Virgo cluster, in the constellation of Virgo and the 87th item in the Messier catalogue.

It is one of the largest galaxies known, containing trillions of stars It is well known for its jet that extends for thousands of light years from its llation: Virgo.We present new 90cm VLA observations of the 80 kpc radio structure of M The new images show a spectacular, complex structure extending from the region containing the jet out into two bubble-like lobes.

The brightest parts of the radio emission suggest a poorly .