Failed Radiatively Accelerated Dusty Out fl ow Model of the Broad Line Region in Active Galactic Nuclei. I. Analytical Solution.
PBN-AR
Instytucja
Centrum Fizyki Teoretycznej Polskiej Akademii Nauk
Informacje podstawowe
Główny język publikacji
en
Czasopismo
ASTROPHYSICAL JOURNAL (40pkt w roku publikacji)
ISSN
0004-637X
EISSN
Wydawca
IOP PUBLISHING LTD
DOI
URL
Rok publikacji
2017
Numer zeszytu
2
Strony od-do
154
Numer tomu
846
Link do pełnego tekstu
Identyfikator DOI
Liczba arkuszy
Autorzy
Pozostali autorzy
+ 4
Słowa kluczowe
en
accretion
accretion disks – galaxies: active – line: formation – line: pro fi les
Streszczenia
Język
en
Treść
The physical origin of the broad line region in active galactic nuclei is still unclear despite many years of observational studies. The reason is that the region is unresolved, and the reverberation mapping results imply acomplex velocity field. We adopt a theory-motivated approach to identify the principal mechanism responsible for this complex phenomenon. We consider the possibility that the role of dust is essential. We assume that the local radiation pressure acting on the dust in the accretion disk atmosphere launches the outflow of material, but higher above the disk the irradiation from the central parts causes dust evaporation and a subsequent fallback. This failed radiatively accelerated dusty outflow is expected to represent the material forming low ionization lines. In this paper we formulate simple analytical equations to describe the cloud motion, including the evaporation phase. The model is fully described just by the basic parameters of black hole mass, accretion rate, black hole spin, and viewing angle. We study how the spectral line generic profiles correspond to this dynamic. We show that the virial factor calculated from our model strongly depends on the black hole mass in the case of enhanced dust opacity, and thus it then correlates with the line width. This could explain why the virial factor measured in galaxies with pseudobulges differs from that obtained from objects with classical bulges, although the trend predicted by the current version of the model is opposite to the observed trend.
Cechy publikacji
discipline:Astronomia
discipline:Fizyka
discipline:Astronomy
discipline:Physics
Original article
Original article presents the results of original research or experiment.
Oryginalny artykuł naukowy
Oryginalny artykuł naukowy przedstawia rezultaty oryginalnych badań naukowych lub eksperymentu.
Inne
System-identifier
PBN-R:831468
CrossrefMetadata from Crossref logo
Cytowania
Liczba prac cytujących tę pracę
Brak danych
Referencje
Liczba prac cytowanych przez tę pracę
Brak danych