Tag Archives: Centaurus A

Centaurus A, NGC 5128

17апр

Centaurus A or NGC 5128 is a prominent galaxy in the constellation of Centaurus. It was discovered in 1826 by Scottish astronomer James Dunlop from his home in Parramatta, in New South Wales, Australia. There is considerable debate in the literature regarding the galaxy’s fundamental properties such as its Hubble type (lenticular galaxy or a giant elliptical galaxy) and distance (10–16 million light-years). NGC 5128 is one of the closest radio galaxies to Earth, so its active galactic nucleus has been extensively studied by professional astronomers. The galaxy is also the fifth brightest in the sky, making it an ideal amateur astronomy target, although the galaxy is only visible from low northern latitudes and the southern hemisphere.

Imaging telescopes or lenses: Bintel (GSO) RC8
Imaging cameras: QHY8L
Mounts: Sky-Watcher HEQ5 PRO Synscan GoTo
Guiding telescopes or lenses: Orion ST 80
Guiding cameras: QHYCCD QHY5
Software: DeepSkyStacker,  StarTools
Filters: Baader Planetarium UHC-S Filter
Resolution: 1500×995
Dates: June 15, 2014
Frames: 15×600″
Integration: 2.5 hours
Avg. Moon age: 16.85 days
Avg. Moon phase: 95.16%
RA center: 201.389 degrees
DEC center: -43.018 degrees
Pixel scale: 0.908 arcsec/pixel
Orientation: 88.052 degrees
Field radius: 0.227 degrees
Locations: Basalt Ridge Observatory, Brisbane Australia, Brisbane, Queensland, Australia

Author: Mario Vecchi

SPONLI is a project about astrophotography, for amateur astronomers.

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Centaurus A, NGC 5128

13мар

Centaurus A or NGC 5128 is a prominent galaxy in the constellation of Centaurus. It was discovered in 1826 by Scottish astronomer James Dunlop from his home in Parramatta, in New South Wales, Australia. There is considerable debate in the literature regarding the galaxy’s fundamental properties such as its Hubble type (lenticular galaxy or a giant elliptical galaxy) and distance (10–16 million light-years). NGC 5128 is one of the closest radio galaxies to Earth, so its active galactic nucleus has been extensively studied by professional astronomers. The galaxy is also the fifth brightest in the sky,  making it an ideal amateur astronomy target, although the galaxy is only visible from low northern latitudes and the southern hemisphere.

Imaging telescopes or lenses: Faulkes Telescope South
Imaging cameras: Fairchild CCD486 BI
Software: DeepSkyStacker
Filters: H-Alpha-6566,  Bessell-B,  SDSS-R, Bessell-V
Resolution: 1459×1464
Dates: Feb. 7, 2014
Frames: 20×90″
Integration: 0.5 hours
Avg. Moon age: 7.55 days
Avg. Moon phase: 51.82%
RA center: 201.370 degrees
DEC center: -43.018 degrees
Orientation: 179.769 degrees
Field radius: 0.116 degrees
Locations: Siding Spring Observatory, Sydney, Australia
Author: Matthew

SPONLI is a project about astrophotography, for amateur astronomers.

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Peculiar Elliptical Galaxy Centaurus A 

CenAwide_colombari_1824
Image Credit & Copyright: Roberto Colombari

 What’s happened to the center of this galaxy? Unusual and dramatic dust lanes run across the center of elliptical galaxy Centaurus A. These dust lanes are so thick they almost completely obscure the galaxy’s center in visible light. This is particularly unusual as Cen A’s red stars and round shape are characteristic of a giant elliptical galaxy, a galaxy type usually low in dark dust. Cen A, also known as NGC 5128, is also unusual compared to an average elliptical galaxy because it contains a higher proportion of young blue stars and is a very strong source of radio emission. Evidence indicates that Cen A is likely the result of the collision of twonormal galaxies. During the collision, many young stars were formed, but details of the creation of Cen A’s unusual dust belts are still being researched. Cen A lies only 13 million light years away, making it the closest active galaxy. Cen A, pictured above, spans 60,000 light years and can be seen with binoculars toward the constellation of Centaurus.

APOD NASA 30-Jun-14

Centaurus A

79a30344b6faeab616a97abaf542b2fe.1824x0_q100_watermark_watermark_opacity-10_watermark_position-6_watermark_text-Copyright Hartmuth Kintzel

Centaurus A or NGC 5128 is a prominent galaxy in the constellation of Centaurus. It was discovered in 1826 by Scottish astronomerJames Dunlop from his home in Parramatta, in New South Wales, Australia. There is considerable debate in the literature regarding the galaxy’s fundamental properties such as its Hubble type (lenticular galaxy or a giant elliptical galaxy) and distance (10–16 million light-years). NGC 5128 is one of the closest radio galaxies to Earth, so its active galactic nucleus has been extensively studied by professional astronomers. The galaxy is also the fifth brightest in the sky, making it an ideal amateur astronomy target, although the galaxy is only visible from low northern latitudes and the southern hemisphere.

The center of the galaxy contains a supermassive black hole with a weight equivalent to 55 million solar masses, which ejects arelativistic jet that is responsible for emissions in the X-ray and radio wavelengths. By taking radio observations of the jet separated by a decade, astronomers have determined that the inner parts of the jet are moving at about one half of the speed of light. X-rays are produced farther out as the jet collides with surrounding gases resulting in the creation of highly energetic particles. The radio jets of Centaurus A are over a million light years long.

Like other starburst galaxies, a collision is suspected to be responsible for the intense burst of star formation. Spitzer Space Telescopestudies have confirmed that Centaurus A is colliding with and devouring a smaller spiral galaxy.

Imaging telescopes or lenses: TMB APO 480 f/6
Imaging cameras: Canon EOS 450D / Digital Rebel XSi / Kiss X2
Mounts: Vixen Atlux
Guiding telescopes or lenses: Rubinar 500/5,6
Guiding cameras: Lacerta MGEN
Software: DeepSkyStacker, Fitswork, photoshop
Filters: Baader IR EOS
Accessories: MGEN
Dates: July 27, 2011
Locations: Tivoli / Namibia
Frames: 9×300″ ISO800
Integration: 0.8 hours
Darks: ~9

Autor: Hartmuth Kintzel

06 March 2014

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