NGC 2681

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51 Mly (15,6 Mpc)[1]
Apparent magnitude (V)11.1
Characteristics
Type(R')SAB(rs)0/a [1]
Apparent size (V)3.6′ × 3.3′[1]
Other designations
UGC 4645, MCG +09-15-041, PGC 24961[1]

NGC 2681 is a

light years away from Earth, which means, given its apparent dimensions, that NGC 2681 is approximately 55,000 light years across. NGC 2681 has an active galactic nucleus and it is a type 3 Seyfert galaxy. Its nucleus is also a low-ionization nuclear emission-line region.[2]

NGC 2681 has possibly three bars, with a relatively large bar at the outer side. Because the galaxy is seen nearly face-on, the bar like structures cannot be projection effects.

HII regions were observed in the spiral arms.[4] A dust spiral is seen in Hubble space telescope images extending to the centre.[5] The lack of stellar gradient in the central regions and the data from Faint Object Camera, Faint Object Spectrograph and International Ultraviolet Explorer indicate that the galaxy had a starburst event approximately one billion years ago, possibly after the tidal interaction with another galaxy, which involved all the galaxy.[2]

Dynamical modeling of the velocity dispersions suggests that NGC 2681 hosts a supermassive black hole whose upper mass limit was set at 6×107 M⊙.[2] As observed from Chandra X-ray Observatory, NGC 2681 displayed three stellar sources within the central kiloparsec of the galaxy. The active galactic nucleus had luminosity 1.8 × 1038 erg/s, which accounts for approximately the 20% of the total luminosity of the central kiloparsec.[6]

References

  1. ^ a b c d e f g "NASA/IPAC Extragalactic Database". Results for NGC 2681. Retrieved 2016-01-18.
  2. ^
    S2CID 119357835
    .
  3. S2CID 14042533
    .
  4. ISSN 0365-0138
    .
  5. S2CID 118654082
    .
  6. S2CID 15112150
    .

External links


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