NGC 1275 Comparison Table

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physical object > natural object > celestial body > collection of stars > galaxy > radio galaxy > NGC 1275

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NGC 1275 comparison table

Subject is part of is a kind of has catalog has classification criterion has number of star has wavelength has redshift is an instance of has synonym has mass has definition has recession velocity

radio galaxy celestial sphere radio source galaxy catalog 10⁶ to 10¹² radio A galaxy that is extremely luminous at radio wavelengths. A radio galaxy is usually a giant elliptical - the largest galaxy in a cluster - and is a strong emitter of synchrotron radiation. M87 and M82 are examples.

Seyfert galaxy spiral galaxy galaxy catalog Subdivided according to the openness of the spiral arms as Sa spiral, Sb spiral or Sc spiral. 10⁶ to 10¹² 10¹⁰ to 10¹² M_sun One of a small class of galaxies (many of which are spirals) of very high luminosity and very blue continuum radiation with small, intensely bright nuclei whose spectra show strong, broad, high-excitation emission lines probably caused by discrete clouds moving at velocities that are higher than the escape velocity. Seyferts possess many of the properties of QSOs, such as the ultraviolet excess of the continuum, the wide emission lines, and the strong infrared luminosity. The energy sources in their nuclei are unexplained; presumably the energy input can be associated with some process that liberates gravitational binding energy to accelerate relativistic particles. Seyferts comprise about 1 percent of the bright galaxies. The brightest Seyfert known is NGC 1068. Weedman-Khachikian classification: class 1 Seyferts have broad Balmer line wings; class 2 have no obvious Balmer line wings.

X-ray source celestial sphere celestial body X-ray A class of celestial objects whose dominant mechanism of energy dissipation is through X-ray emission. Galactic X-ray sources appear optically as starlike objects, peculiar in their ultraviolet intensity, variability (on time scales ranging from milliseconds to weeks), and spectral features. All known compact X-ray sources are members of close binary systems; a current popular model is mass accretion onto a compact object from a massive companion. (Four X-ray sources - all variable - are known to be associated with globular clusters.) The 21 known extended X-ray sources associated with clusters of galaxies seem to be clouds of hot gas trapped in the cluster's gravitational field.

NGC 1275 celestial sphere galaxy catalog Subdivided according to the openness of the spiral arms as Sa spiral, Sb spiral or Sc spiral. 10⁶ to 10¹² X-ray z = 0.0183 X-ray source Abell 426 10¹⁰ to 10¹² M_sun The strongest known extragalactic X-ray source. Also a strong radio source. Optically it is a Seyfert galaxy with a huge amount (about 10⁸ M_sun) of ionized gas receding from it. 5000 km s^-1

Subject	is part of	is a kind of	has catalog	has classification criterion	has number of star	has wavelength	has redshift	is an instance of	has synonym	has mass	has definition	has recession velocity
radio galaxy	celestial sphere	radio source	galaxy catalog		10⁶ to 10¹²	radio					A galaxy that is extremely luminous at radio wavelengths. A radio galaxy is usually a giant elliptical - the largest galaxy in a cluster - and is a strong emitter of synchrotron radiation. M87 and M82 are examples.
Seyfert galaxy		spiral galaxy	galaxy catalog	Subdivided according to the openness of the spiral arms as Sa spiral, Sb spiral or Sc spiral.	10⁶ to 10¹²					10¹⁰ to 10¹² M_sun	One of a small class of galaxies (many of which are spirals) of very high luminosity and very blue continuum radiation with small, intensely bright nuclei whose spectra show strong, broad, high-excitation emission lines probably caused by discrete clouds moving at velocities that are higher than the escape velocity. Seyferts possess many of the properties of QSOs, such as the ultraviolet excess of the continuum, the wide emission lines, and the strong infrared luminosity. The energy sources in their nuclei are unexplained; presumably the energy input can be associated with some process that liberates gravitational binding energy to accelerate relativistic particles. Seyferts comprise about 1 percent of the bright galaxies. The brightest Seyfert known is NGC 1068. Weedman-Khachikian classification: class 1 Seyferts have broad Balmer line wings; class 2 have no obvious Balmer line wings.
X-ray source	celestial sphere	celestial body				X-ray					A class of celestial objects whose dominant mechanism of energy dissipation is through X-ray emission. Galactic X-ray sources appear optically as starlike objects, peculiar in their ultraviolet intensity, variability (on time scales ranging from milliseconds to weeks), and spectral features. All known compact X-ray sources are members of close binary systems; a current popular model is mass accretion onto a compact object from a massive companion. (Four X-ray sources - all variable - are known to be associated with globular clusters.) The 21 known extended X-ray sources associated with clusters of galaxies seem to be clouds of hot gas trapped in the cluster's gravitational field.
NGC 1275	celestial sphere		galaxy catalog	Subdivided according to the openness of the spiral arms as Sa spiral, Sb spiral or Sc spiral.	10⁶ to 10¹²	X-ray	z = 0.0183	X-ray source	Abell 426	10¹⁰ to 10¹² M_sun	The strongest known extragalactic X-ray source. Also a strong radio source. Optically it is a Seyfert galaxy with a huge amount (about 10⁸ M_sun) of ionized gas receding from it.	5000 km s^-1

Next radio galaxy: radio loud quasar Up: radio galaxy, Seyfert galaxy, X-ray source Previous radio galaxy: Narrow-line radio galaxy