TY - JOUR
T1 - The variable iron K emission line in MCG-6-30-15
AU - Iwasawa, K.
AU - Fabian, A. C.
AU - Reynolds, C. S.
AU - Nandra, K.
AU - Otani, C.
AU - Inoue, H.
AU - Hayashida, K.
AU - Brandt, W. N.
AU - Dotani, T.
AU - Kunieda, H.
AU - Matsuoka, M.
AU - Tanaka, Y.
PY - 1996
Y1 - 1996
N2 - We report on the variability of the iron K emission line in the Seyfert 1 galaxy MCG-6-30-15 during a four-day ASCA observation. The line consists of a narrow core at an energy of about 6.4 keV, and a broad red wing extending to below 5 keV, which are interpreted as line emission arising from the inner parts of an accretion disc. The narrow core correlates well with the continuum flux whereas the broad wing weakly anticorrelates. When the source is brightest, the line is dominated by the narrow core, whilst, during a deep minimum, the narrow core is very weak and a huge red tail appears. However, at other times when the continuum shows rather rapid changes, the broad wing is more variable than the narrow core, and shows evidence for correlated changes contrary to its long-time-scale behaviour. The peculiar line profile during the deep minimum spectrum suggests that the line-emitting region is very close to a central spinning (Kerr) black hole where enormous gravitational effects operate.
AB - We report on the variability of the iron K emission line in the Seyfert 1 galaxy MCG-6-30-15 during a four-day ASCA observation. The line consists of a narrow core at an energy of about 6.4 keV, and a broad red wing extending to below 5 keV, which are interpreted as line emission arising from the inner parts of an accretion disc. The narrow core correlates well with the continuum flux whereas the broad wing weakly anticorrelates. When the source is brightest, the line is dominated by the narrow core, whilst, during a deep minimum, the narrow core is very weak and a huge red tail appears. However, at other times when the continuum shows rather rapid changes, the broad wing is more variable than the narrow core, and shows evidence for correlated changes contrary to its long-time-scale behaviour. The peculiar line profile during the deep minimum spectrum suggests that the line-emitting region is very close to a central spinning (Kerr) black hole where enormous gravitational effects operate.
UR - http://www.scopus.com/inward/record.url?scp=1542606598&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=1542606598&partnerID=8YFLogxK
U2 - 10.1093/mnras/282.3.1038
DO - 10.1093/mnras/282.3.1038
M3 - Article
AN - SCOPUS:1542606598
SN - 0035-8711
VL - 282
SP - 1038
EP - 1048
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 3
ER -