Variable and Polarised Near-infrared Emission from the Galactic Centre

Shahzamanian, B.; Eckart, A.; Valencia-S, M.; Witzel, G.; Zamaninasab, M.; Zajaček, Michal; Sabha, N.; García-Marín, M.; Karas, Vladimír; Peissker, F.; Karssen, G.; Parsa, M.; Grosso, N.; Mossoux, E.; Porquet, D.; Jalali, B.; Horrobin, M.; Buchholz, R. M.; Dovčiak, Michal; Kunneriath, Devaky; Bursa, Michal; Zensus, A.; Schödel, R.; Moultaka, J.; Straubmeier, C.

Počet záznamů: 1

Variable and Polarised Near-infrared Emission from the Galactic Centre

1.

SYSNO ASEP	0450777
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Ostatní články
Název	Variable and Polarised Near-infrared Emission from the Galactic Centre
Tvůrce(i)	Shahzamanian, B. (DE) Eckart, A. (DE) Valencia-S, M. (DE) Witzel, G. (DE) Zamaninasab, M. (DE) Zajaček, Michal (ASU-R)_ORCID Sabha, N. (DE) García-Marín, M. (DE) Karas, Vladimír (ASU-R)_{RID, ORCID} Peissker, F. (DE) Karssen, G. (DE) Parsa, M. (DE) Grosso, N. (FR) Mossoux, E. (FR) Porquet, D. (FR) Jalali, B. (DE) Horrobin, M. (DE) Buchholz, R. M. (DE) Dovčiak, Michal (ASU-R)_{RID, ORCID} Kunneriath, Devaky (ASU-R)_RID Bursa, Michal (ASU-R)_{RID, ORCID} Zensus, A. (DE) Schödel, R. (DE) Moultaka, J. (DE) Straubmeier, C. (DE)
Zdroj.dok.	Messenger. - : European Southern Observatory - ISSN 0722-6691 Roč. 159, March (2015), s. 41-45
Poč.str.	5 s.
Forma vydání	Tištěná - P
Jazyk dok.	eng - angličtina
Země vyd.	DE - Německo
Klíč. slova	polarisation effects ; galactic center ; observations
Vědní obor RIV	BN - Astronomie a nebeská mechanika, astrofyzika
Institucionální podpora	ASU-R - RVO:67985815
Anotace	Infrared observations of the Galactic Centre (GC) provide a unique opportunity to study stellar and bow-shock polarisation effects in a dusty environment. For the infrared counterpart of the supermassive black hole Sgr A* these observations reveal new insights into the physical processes at work. The observations were carried out with NACO in the Ks-band (2.2 µm) from 2004 to 2012 and several linearly polarised flares were observed during these years. We find that the distribution of polarised flux density is closely related to the single-state power-law distribution of the total flux densities. A typical polarisation degree of the order of 10-20% and a preferred polarisation angle of 13° ± 15° are derived, likely linked to the intrinsic orientation of the Sgr A* system. We discuss different scenarios for the accretion process for the Sgr A* system based on our findings.
Pracoviště	Astronomický ústav
Kontakt	Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326
Rok sběru	2016

Počet záznamů: 1