Deep Narrow-Band Imaging of M87: a Close Look at the Disk of Ionized Gas Fueling a Massive Black Hole

Details Deep Narrow-Band Imaging of M87: a Close Look at the Disk of Ionized Gas Fueling a Massive Black Hole Deep Narrow-Band Imaging of M87: a Close Look at the Disk of Ionized Gas Fueling a Massive Black Hole

Jul 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995hst..prop.6296f&link_type=abstract

HST Proposal ID #6296

Astronomy and Astrophysics

Astrophysics

Hst Proposal Id #6296 Agn

Scientific paper

M87 provides a unique example of a 100 pc scale disk of ionized gasfueling a massive black hole (Ford et al. 1994, Harms et al. 1994).The disk shows tantalizing evidence for spiral structure and a possibleconnection to large scale, wrapped filaments. Sparks, Ford, and Kinney(1993) used observations of dust absorption in the filaments andblueshifted velocities with respect to M87 to conclude that thefilaments are an outflow from the nucleus. If the wrapped filamentsare in fact an outflow, we are witnessing the solution to anoutstanding problem in astrophysics, that of removing angular momentumfrom a disk to allow the gas to flow onto the central massive black hole.We propose to use 6 orbits to take deep, half-pixel stepped,Halpha+[Nii] on-band images to study the morphology in the disk andfilaments. The images will be one magnitude deeper than previousimages and will reach the 0.06'' diffraction limit of the telescopeat Halpha. Our goals are to use the deep, high resolution images to:1) Investigate and understand the apparent connection between thefilaments and the disk.2) Delineate the apparent spiral structure in the disk.3) Confirm the presence of faint Halpha+[Nii] emission associated withthe jet, which could be gas which has been entrained by the jet.

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