Do all bright elliptical galaxies have active nuclei?

Bibcode
1984A&A...130L..13P
Perez-Fournon, I.; Biermann, P.
Bibliographical reference

Astronomy and Astrophysics (ISSN 0004-6361), vol. 130, no. 2, Jan. 1984, p. L13-L15. Sponsorship: Deutsche Forschungsgemeinschaft.

Advertised on:
1
1984
Number of authors
2
IAC number of authors
0
Citations
22
Refereed citations
14
Description
The evidence is noted that (1) a flux density limited complete sample of X-ray emitting BL Lac type sources is now available from Schwartz and Ku (1983), that (2) the radio through X-ray emission of BL Lac type sources is most easily interpreted as nonthermal emission from a relativistically boosted jet pointed close to the line of sight and that (3) all galaxies identified with BL Lacs are of giant elliptical type. From this, a space density of the parent population of BL Lacs is derived, elliptical galaxies with relativistically boosted jets not generally pointed at the observer. This space density is remarkably close to that of bright elliptical galaxies and suggests that these galaxies constitute the parent population for BL Lacs.
Type
Refereed
Active galactic nuclei
BL Lacertae objects
Elliptical galaxies
Plasma jets

It may interest you

  • Refereed
    Characterisation at Cryogenic Temperatures of an Attenuator for an Application of Astrophysical Instrumentation with MKIDs
    The use of non-cryogenic certified commercial electronics for cryogenic applications may be attractive due to their cost and availability, but it also carries risks related to reliability, performance and thermal compatibility. The decision to use commercial components that are not certified for cryogenics instead of components specifically
    Rodríguez Ramos L.F. et al.

    Advertised on:

    12
    2024
  • Refereed
    The CARMENES search for exoplanets around M dwarfs: The impact of rotation and magnetic fields on the radial velocity jitter in cool stars
    Context. Radial velocity (RV) jitter represents an intrinsic limitation on the precision of Doppler searches for exoplanets that can originate from both instrumental and astrophysical sources. Aims. We aim to determine the RV jitter floor in M dwarfs and investigate the stellar properties that lead to RV jitter induced by stellar activity. Methods
    Ruh, H. L. et al.

    Advertised on:

    12
    2024
    Bibcode
    2024A&A...692A.138R
    Citations
    0
  • Refereed
    The return of FarNet-II: Generation of solar far-side magnetograms from helioseismic data
    Context. The far-side activity of the Sun can be inferred by interpreting the near-side wave field using local helioseismic techniques. However, detections are limited to strongly active regions because signal-to-noise ratio of the data is low. Recently, we developed the FarNet and FarNet-II neural networks to improve the identification of active
    Broock, E. G. et al.

    Advertised on:

    12
    2024
    Bibcode
    2024A&A...692A.182B
    Citations
    0