2022
Host galaxy magnitude of OJ 287 from its colours at minimum light
VALTONEN, Mauri J.; Lankeswar DEY; Stanislaw ZOLA; S. CIPRINI; M. KIDGER et al.Základní údaje
Originální název
Host galaxy magnitude of OJ 287 from its colours at minimum light
Autoři
VALTONEN, Mauri J.; Lankeswar DEY; Stanislaw ZOLA; S. CIPRINI; M. KIDGER; T. PURSIMO; A. GOPAKUMAR; K. MATSUMOTO; K. SADAKANE; D. B. CATON; K. NILSSON; S. KOMOSSA; M. BAGAGLIA; A. BARANSKY; P. BOUMIS; D. BOYD; A. J. CASTRO-TIRADO; B. DEBSKI; M. DROZDZ; A. E. PEREZE; M. FIORUCCI; F. GARCIA; K. GAZEAS; S. GHOSH; V. GODUNOVA; J. L. GOMEZ; R. GREDEL; D. GRUPE; J. B. HAISLIP; T. HENNING; G. HURST; Jan JANÍK ORCID; V. V. KOUPRIANOV; H. LEHTO; A. LIAKOS; S. MATHUR; M. MUGRAUER; R. N. NOGUES; G. NUCCIARELLI; W. OGLOZA; D. K. OJHA; U. PAJDOSZ-SMIERCIAK; S. PASCOLINI; G. POYNER; D. E. REICHART; N. RIZZI; F. RONCELLA; D. K. SAHU; A. SILLANPAA; A. SIMON; M. SIWAK; F. C. SOLDAN ALFARO; E. SONBAS; G. TOSTI; V. VASYLENKO; J. R. WEBB a P. ZIELINSKI
Vydání
Monthly Notices of the Royal Astronomical Society, MALDEN, WILEY, 2022, 0035-8711
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10308 Astronomy
Stát vydavatele
Velká Británie a Severní Irsko
Utajení
není předmětem státního či obchodního tajemství
Impakt faktor
Impact factor: 4.800
Označené pro přenos do RIV
Ano
Kód RIV
RIV/00216224:14310/22:00126442
Organizační jednotka
Přírodovědecká fakulta
UT WoS
EID Scopus
Klíčová slova anglicky
galaxies: active; BL Lacertae objects: general; BL Lacertae objects: individual: OJ 287; galaxies: bulges
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 6. 12. 2022 11:09, Mgr. Marie Novosadová Šípková, DiS.
Anotace
V originále
OJ 287 is a BL Lacertae type quasar in which the active galactic nucleus (AGN) outshines the host galaxy by an order of magnitude. The only exception to this may be at minimum light when the AGN activity is so low that the host galaxy may make quite a considerable contribution to the photometric intensity of the source. Such a dip or a fade in the intensity of OJ 287 occurred in 2017 November, when its brightness was about 1.75 mag lower than the recent mean level. We compare the observations of this fade with similar fades in OJ 287 observed earlier in 1989, 1999, and 2010. It appears that there is a relatively strong reddening of the B- V colours of OJ 287 when its V-band brightness drops below magnitude 17. Similar changes are also seen in V- R, V- I, and R- I colours during these deep fades. These data support the conclusion that the total magnitude of the host galaxy is V = 18.0 +/- 0.3, corresponding to M-K = -26.5 +/- 0.3 in the K-band. This is in agreement with the results, obtained using the integrated surface brightness method, from recent surface photometry of the host. These results should encourage us to use the colour separation method also in other host galaxies with strongly variable AGN. In the case of OJ 287, both the host galaxy and its central black hole are among the biggest known, and its position in the black hole mass-galaxy mass diagram lies close to the mean correlation.