Revealing the velocity structure of the filamentary nebula in NGC 1275 in its entirety
Martin, T B
Fabian, A C
Edge, A C
Hamer, S L
AffiliationUniv Arizona, LBT Observ
MetadataShow full item record
PublisherOXFORD UNIV PRESS
CitationM Gendron-Marsolais, J Hlavacek-Larrondo, T B Martin, L Drissen, M McDonald, A C Fabian, A C Edge, S L Hamer, B McNamara, G Morrison, Revealing the velocity structure of the filamentary nebula in NGC 1275 in its entirety, Monthly Notices of the Royal Astronomical Society: Letters, Volume 479, Issue 1, September 2018, Pages L28–L33, https://doi.org/10.1093/mnrasl/sly084
Rights© 2018 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society.
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AbstractWe have produced for the first time a detailed velocity map of the giant filamentary nebula surrounding NGC 1275, the Perseus cluster's brightest galaxy, and revealed a previously unknown rich velocity structure across the entire nebula, These new observations were obtained with the optical imaging Fourier transform spectrometer SITELLE at CFHT With its wide field of view (similar to 11 arcmin x 11 arcmin), SITELLE is the only integral field unit spectroscopy instrument able to cover the 80 kpc x 55 kpc (3.8 arcmin x 2.6 arcmin) large nebula in NGC 1275, Our analysis of these observations shows a smooth radial gradient of the [NII]lambda 6583/H alpha line ratio, suggesting a change in the ionization mechanism and source across the nebula. The velocity map shows no visible general trend or rotation, indicating that filaments are not falling uniformly onto the galaxy, nor being uniformly pulled out from it, Comparison between the physical properties of the filaments and Hitomi measurements of the X-ray gas dynamics in Perseus is also explored.
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SponsorsNSERC Postgraduate Scholarships-Doctoral Program; NSERC; Canada Research Chair programs; FRQNT; ERC ; STFC grant [ST/P00541/1]