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Host galaxy magnitude of OJ 287 from its colours at minimum light

Alfaro FCS; Bagaglia M; Baransky A; Boumis P; Boyd D; Castro-Tirado AJ; Caton DB; Ciprini S; Debski B; Dey Lankeswar; Drozdz M; Fiorucci M; Garcia F; Gazeas K; Ghosh S; Godunova V; Gomez JL; Gopakumar A; Gredel R; Grupe D; Haislip JB; Henning T; Hurst G; Janik J; Kidger M; Komossa S; Kouprianov VV; Lehto H; Liakos A; Mathur S; Matsumoto K; Mugrauer M; Nilsson K; Nogues RN; Nucciarelli G; Ogloza W; Ojha DK; Pajdosz-Smierciak U; Pascolini S; Perez AE; Poyner G; Pursimo T; Reichart DE; Rizzi N; Roncella F; Sadakane K; Sahu DK; Sillanpaa A; Simon A; Siwak M; Sonbas E; Tosti G; Valtonen Mauri J; Vasylenko V; Webb JR; Zielinski P; Zola S

dc.contributor.authorAlfaro FCS
dc.contributor.authorBagaglia M
dc.contributor.authorBaransky A
dc.contributor.authorBoumis P
dc.contributor.authorBoyd D
dc.contributor.authorCastro-Tirado AJ
dc.contributor.authorCaton DB
dc.contributor.authorCiprini S
dc.contributor.authorDebski B
dc.contributor.authorDey Lankeswar
dc.contributor.authorDrozdz M
dc.contributor.authorFiorucci M
dc.contributor.authorGarcia F
dc.contributor.authorGazeas K
dc.contributor.authorGhosh S
dc.contributor.authorGodunova V
dc.contributor.authorGomez JL
dc.contributor.authorGopakumar A
dc.contributor.authorGredel R
dc.contributor.authorGrupe D
dc.contributor.authorHaislip JB
dc.contributor.authorHenning T
dc.contributor.authorHurst G
dc.contributor.authorJanik J
dc.contributor.authorKidger M
dc.contributor.authorKomossa S
dc.contributor.authorKouprianov VV
dc.contributor.authorLehto H
dc.contributor.authorLiakos A
dc.contributor.authorMathur S
dc.contributor.authorMatsumoto K
dc.contributor.authorMugrauer M
dc.contributor.authorNilsson K
dc.contributor.authorNogues RN
dc.contributor.authorNucciarelli G
dc.contributor.authorOgloza W
dc.contributor.authorOjha DK
dc.contributor.authorPajdosz-Smierciak U
dc.contributor.authorPascolini S
dc.contributor.authorPerez AE
dc.contributor.authorPoyner G
dc.contributor.authorPursimo T
dc.contributor.authorReichart DE
dc.contributor.authorRizzi N
dc.contributor.authorRoncella F
dc.contributor.authorSadakane K
dc.contributor.authorSahu DK
dc.contributor.authorSillanpaa A
dc.contributor.authorSimon A
dc.contributor.authorSiwak M
dc.contributor.authorSonbas E
dc.contributor.authorTosti G
dc.contributor.authorValtonen Mauri J
dc.contributor.authorVasylenko V
dc.contributor.authorWebb JR
dc.contributor.authorZielinski P
dc.contributor.authorZola S
dc.date.accessioned2022-10-27T11:54:36Z
dc.date.available2022-10-27T11:54:36Z
dc.identifier.urihttps://www.utupub.fi/handle/10024/155828
dc.description.abstractOJ 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.
dc.language.isoen
dc.publisherOxford Univ Press
dc.titleHost galaxy magnitude of OJ 287 from its colours at minimum light
dc.identifier.urlhttps://academic.oup.com/mnras/article/514/2/3017/6598825
dc.identifier.urnURN:NBN:fi-fe2022081153741
dc.relation.volume514
dc.contributor.organizationfi=Suomen ESO-keskus, yhteiset|en=Finnish Centre for Astronomy with ESO - FINCA|
dc.contributor.organizationfi=Tuorlan observatorio|en=Tuorla Observatory|
dc.contributor.organization-code2606705
dc.contributor.organization-code2609700
dc.converis.publication-id175901106
dc.converis.urlhttps://research.utu.fi/converis/portal/Publication/175901106
dc.format.pagerange3017
dc.format.pagerange3023
dc.identifier.eissn1365-2966
dc.identifier.jour-issn0035-8711
dc.okm.affiliatedauthorDataimport, Suomen ESO-keskus
dc.okm.affiliatedauthorNilsson, Kari
dc.okm.affiliatedauthorSillanpää, Aimo
dc.okm.affiliatedauthorValtonen, Mauri
dc.okm.discipline115 Astronomy and space scienceen_GB
dc.okm.discipline115 Avaruustieteet ja tähtitiedefi_FI
dc.okm.internationalcopublicationinternational co-publication
dc.okm.internationalityInternational publication
dc.okm.typeJournal article
dc.publisher.countryUnited Kingdomen_GB
dc.publisher.countryBritanniafi_FI
dc.publisher.country-codeGB
dc.relation.doi10.1093/mnras/stac1522
dc.relation.ispartofjournalMonthly Notices of the Royal Astronomical Society
dc.relation.issue2
dc.year.issued2022


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