IC 1481: Difference between revisions - Wikipedia

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The maser features are found distributed, which they contain a [[Strain-rate tensor|velocity gradient]]. This suggests the AGN of IC 1481 has an unstable [[Molecule|molecular]] gas disk with a mass of (4.3 ± 0.3) x 10⁷ M_Θ. The disk is seen edge-on. It has a thickness of 2H = 1.5-4.2 pc and a radius of r = 2.8-14.0 pc making the largest amongst other maser disks observed in other AGNs. Not to mention, the disk has a [[rotation]] of V_rot = 124–168&nbsp;km s⁻¹ and a [[velocity dispersion]] measured by △V ≈ 31&nbsp;km s⁻¹. Further observations found the disk of IC 1481 is huge indicated by its rotation curve being a sub-Keplerian.<ref name=":0" /> When compared to the galaxy's [[black hole]] mass of <10⁷ M_Θ, its mass is higher.<ref name=":0" /><ref>{{Cite journal |last1=Huré |first1=J.-M. |last2=Hersant |first2=F. |last3=Surville |first3=C. |last4=Nakai |first4=N. |last5=Jacq |first5=T. |date=2011-06-01 |title=AGN disks and black holes on the weighting scales |url=https://www.aanda.org/articles/aa/full_html/2011/06/aa15062-10/aa15062-10.html |journal=Astronomy & Astrophysics |language=en |volume=530 |pages=A145 |doi=10.1051/0004-6361/201015062 |issn=0004-6361}}</ref>

One [[supernova]] has been observed in IC 1481: SN{{nbsp}}2000ey ([[type Ia supernova|type{{nbsp}}Ia]], mag. 16.2).<ref>{{cite web | website=Transient Name Server | title=SN{{nbsp}}2000ey | url=https://www.wis-tns.org/object/2000ey | publisher = [[International_Astronomical_Union|IAU]] | access-date=25 September 2024}}</ref><ref>{{cite web

| url = https://www.rochesterastronomy.org/sn2000/index.html#2000ey

| title = Bright Supernovae - 2000, entry for SN 2000ey

| last = Bishop

| first = David

| website = Rochester Astronomy

| access-date = 25 September 2024

}}</ref>

== References ==