Query : 2015A&A...577L...1K

2015A&A...577L...1K - Astronomy and Astrophysics, volume 577, L1-1 (2015/5-1)

Proving strong magnetic fields near to the central black hole in the quasar PG 0043+039 via cyclotron lines.


Abstract (from CDS):

The optical luminous quasar PG0043+039 has not been detected before in deep X-ray observations indicating the most extreme optical-to-X-ray slope index αox of all quasars. This study aims to detect PG0043+039 in a deep X-ray exposure. Furthermore, we wanted to check out whether this object shows specific spectral properties in other frequency bands. We took deep X-ray (XMM-Newton), far-ultraviolet (HST), and optical (HET, SALT telescopes) spectra of PG0043+039 simultaneously in July 2013. We just detected PG0043+039 in our deep X-ray exposure. The steep αox=-2.37±0.05 gradient is consistent with an unusual steep gradient Fνα with α=-2.67±0.02 seen in the UV/far-UV continuum. The optical/UV continuum flux has a clear maximum near 2500Å. The UV spectrum is very peculiar because it shows broad humps in addition to known emission lines. A modeling of these observed humps with cyclotron lines can explain their wavelength positions, their relative distances, and their relative intensities. We derive plasma temperatures of T∼3keV and magnetic field strengths of B ∼2x108G for the line-emitting regions close to the black hole.

Abstract Copyright:

Journal keyword(s): galaxies: active - quasars: emission lines - galaxies: individual: PG0043+039

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
1 QSO B0043+0354 Sy1 00 45 47.2230875166 +04 10 23.385233220   15.88 16.00     ~ 151 0
2 Mrk 1502 Sy1 00 53 34.9326560879 +12 41 35.927159668   14.41 14.03     ~ 1065 1
3 Ton 1329 QSO 11 05 39.8135767806 +34 25 34.684245994   16.02 15.89     ~ 47 0
4 Mrk 231 Sy1 12 56 14.2340989340 +56 52 25.238555193   14.68 13.84     ~ 1843 3

    Equat.    Gal    SGal    Ecl

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