NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-16 T23:47:07 PDT
Help | Comment | NED Home

Notes for object NGC 2989

6 note(s) found in NED.


1. 2009ApJ...696.1218Z
Re:NGC 2989
NGC 2989. VCV identifies NGC 2989 as an H ii galaxy. Goncalves et al. (1999)
(NB: co-authors are Veron-Cetty and Veron) classify this as a pure H II galaxy,
based on flux ratios, log([O III]/H{beta}) = -0.2304, log([N II]/H{alpha}) =
-0.2757. This falls within but almost on the theoretical star formation line
developed by Kewley et al. (2001). It may be a composite AGN-Starburst
(transitioning) object with AGN contribution to the total luminosity <=20%.

2. 1999A&AS..135..437G
Re:NGC 2989
NGC 2989 is a Sc galaxy (Sandage & Bedke 1994). Published data (Table 2)
indicate a "transition" spectrum; Phillips et al. (1983) called it a
intermediate object, but Veron-Cetty & Veron (1984), on the basis of the
same line ratios, classified it as a H II region. Our measured flux
ratios ({lambda}5007/H{beta} = 1.70, {lambda}6300/H{alpha} = 0.04 and
{lambda}6583/H{alpha} = 0.53) are in good agreement with Phillips et al.
and show that this is indeed a pure H II region with, perhaps a
marginally large {lambda}6583/H{alpha} ratio.

3. 1994CAG1..B...0000S
Re:NGC 2989
Sc(s)I
CD-683-Br
Jan 26/27, 1979
103aO + GG385
45 min
The angular diameter of NGC 2989 is small
at 1.4'; the redshift is v_o = 3916 km/s. The
spiral pattern is regular and of the multiple-armed
type, similar to all others on this panel.

4. 1985SGC...C...0000C
Re:NGC 2989
Plate 2856
Overexposed center (with bar and ring??), knotty arms. Low surface
brightness companion 2.0 south.

5. 1979AJ.....84..472S
Re:NGC 2989
Multiple high-surface-brightnsss arms that are thin,
but tend toward branching in outer spirals.
Arms are very lumpy, but the HII regions will probably not resolve,
although the largest lump on this 2 arcsec seeing plate appears
to be intrinsically fuzzy.

6. 1968MCG4..C...0000V
Re:MCG -03-25-020
According to vB - Sb+II.


Back to NED Home