EDP Sciences logo
Subscriber Authentication Point
Search
Menu
Home All issues Volume 640 (August 2020) A&A, 640 (2020) A104 Full HTML
Free Access

Table 2.

Kinetic and gravitational energy.

Component Velocity σ K(a) W(a)
(km s−1) (km s−1)
Jet 600 30–60 11.2 0.01
NW 90 30 0.4 0.03
SW/C 30 10 0.2 0.03
Disk 27 10–30 0.3 0.80
BH 0.03
Stars 17
Total (b) ∼12 ∼18

Notes.

(a)

The kinetic energy is K≃ where M is the mass of the component (jet, NW = narrow wind, SW/C = slow wind (also the envelope or cocoon), disk), v its velocity and σ its dispersion. In units of ×1011 M⊙ (pc Myr−1)2. For the SW/C we assume an average outflow velocity of 30 km s−1. The rotational velocity of the disk is assuming an i = 70°. The gravitational energy is where M is the mass of the component. Units are 1011 M⊙ (pc Myr−1)2. WBH is the gravitational energy of the central SMBH inside renv = 100 pc and Wstar is that of the stellar and envelope system for the same region. The mass of the stars inside r = 100 pc is estimated to 2 × 108 M⊙ from an HST H-band image (HST program GO14728, J Gallagher PI).

(b)

The total kinetic energy of the system Ktotal = Kjet + Kwind + Kdisk and the total gravitational energy of the system Wtotal = Wjet + Wenv + Wdisk + WBH + Wstar out to a radius r = 100 pc.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.