A Galaxy X-Ray Fundamental Plane? | Zendy

M. Fukugita | Zendy; P. J. E. Peebles | Zendy

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A Galaxy X-Ray Fundamental Plane?

Author(s) -

M. Fukugita,

P. J. E. Peebles

Publication year - 1999

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/312290

Subject(s) - physics , astrophysics , elliptical galaxy , fundamental plane (elliptical galaxies) , spiral galaxy , galaxy rotation curve , dark matter halo , lenticular galaxy , galaxy , astronomy , halo

We suggest the radii and luminosities of the X-ray emitting halos ofelliptical galaxies define a fundamental plane with the star velocitydispersions, as for the corresponding optical observables. Since the X-rayemitting material usually is at larger radius than the stars this can beinterpreted as additional evidence for a relation between the spacedistributions of stellar and dark mass, in analogy to the Tully-Fisher relationand flat rotation curves for spiral galaxies. The picture is complicated,however, by ellipticals with relatively low X-ray luminosities that appear tohave modest dark halos, quite unlike the standard picture for spirals.Comment: 5 pages, 2 figures; submitted to ApJ Letter

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