Remerciements

Daigle, Daniel; Parisot, Anne-Marie

doi:10.2307/j.ctv18pgmr7.3

Cited by 1 publication

(2 citation statements)

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“…The maximum rotational velocity has been shown to follow a tight correlation with the stellar velocity dispersion in spiral galaxies in which extended rotation curves are available (Ferrarese 2002;Baes et al 2003;Courteau et al 2007). As part of the SINGS data deliveries, Hα rotation curves are available for NGC 3621 (Daigle et al 2006) 5 . The maximum rotational velocity obtained from this rotation curve is 180 km s −1 , which assuming an inclination angle of 65 degrees (Daigle et a.…”

Section: Resultsmentioning

confidence: 99%

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The Discovery of an Active Galactic Nucleus in the Late-Type Galaxy NGC 3621: Spitzer Spectroscopic Observations

Satyapal

Vega

Heckman

et al. 2007

ApJ

114

139

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We report the discovery of an active galactic nucleus (AGN) in the nearby SAd galaxy NGC 3621 using Spitzer high spectral resolution observations. These observations reveal the presence of [Ne v] 14 and 24 mm emission that is centrally concentrated and peaks at the position of the near-infrared nucleus. Using the [Ne v] line luminosity, we estimate that the nuclear bolometric luminosity of the AGN is ∼ ergs s Ϫ1 , which, 41 5 # 10 based on the Eddington limit, corresponds to a lower mass limit of the black hole of ∼ M , . Using an 3 4 # 10 order-of-magnitude estimate for the bulge mass based on the Hubble type of the galaxy, we find that this lower mass limit does not put a strain on the well-known relationship between the black hole mass and the host galaxy's stellar velocity dispersion established in predominantly early-type galaxies. Multiwavelength follow-up observations of NGC 3621 are required to obtain more precise estimates of the bulge mass, black hole mass, accretion rate, and nuclear bolometric luminosity. The discovery reported here adds to the growing evidence that a black hole can form and grow in a galaxy with no or minimal bulge.

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Section: Resultsmentioning

confidence: 99%

“…As part of the SINGS data deliveries, Hα rotation curves are available for NGC 3621 (Daigle et al 2006) 5 . The maximum rotational velocity obtained from this rotation curve is 180 km s −1 , which assuming an inclination angle of 65 degrees (Daigle et a. 2006) corresponds to an inclination-corrected velocity of ∼ 200 km s −1 .…”

Section: Resultsmentioning

confidence: 99%