HI in Early Type Galaxies
This page contains results of VLA 21cm imaging observations of
two samples of early type galaxies: IRAS selected E/S0s, and
X-ray selected E's. This data is unpublished, so please do
not use without the consent of J. Hibbard and the collaborators
listed on this page.
the shell sample of van Gorkom & Schminovich, and the
HI observations with the ATCF, maintained by B. Koribalski.
Optical images are from the
Digital Sky Survey,
retrieved from the
CADC CDROM jukebox.
HI in IRAS Selected E/S0's
Michael Rupen NRAO (P.I.)
VLA D- and DnC-array HI mapping of a complete sample of E's selected on
the following basis:
Kjersten Bunker, NCSU
J. Hibbard, NRAO
Last updated: 8/16/98 23:55
- Sample of Knapp et al. 1989
- 100 um flux > 1 Jy
- Vo < 3000 km/s
Follow this link to Kjersten's
Summer Student Talk (presentation via
IMPROF(TM), a product of Guy Worthy.
Let me know how useful/slow this is.
NGC 2292/3 (S0_o pec, S0+ pec)
Environment: Compact group LGG 138 or NGC 2280 group
HI cube: R=1, 40"x33", dv=41.8 km/s, 1sigma=0.7 mJy/b
Beautiful complete HI ring seems associated with faint extended stellar
disk emenating from NGC 2293 and surrounding both galaxies. Also
detect edge-on spiral to north (ESO 490-G045). The spiral to the
west of NGC 2292/3 is NGC 2295, and is not detected in HI,
despite having a a very similar optical velocity.
Also observed by David Barnes at the
ATCA (see July ATNF newsletter).
NGC 2328 (S0-?)
HI cube: R=1, 96"x33", dv= 41.5 km/s, 1sigma=1.2 mJy/b
Goodly amount of HI, centrally concentrated. Also observed by
(C530, Morganti, Sadler, & Oosterloo).
NGC 3273 (S0^o)
Environment: group LGG 200=Antilia Group
HI cube: R=1, 53"x38", dv=41.9 km/s, 1sigma=0.7 mJy/b
No HI detected in NGC 3273. We do detect two dwarf companions
(No. 212 of Antilla group, Sm III directly to NW, and
MCG -06-23-034, Sb to the SW), and
possibly some emission to the north.
NGC 4125 (E6 pec, LINER)
Environment: group LGG 266=NGC 4125 group. X-ray source.
HI cube: R=1, 160"x40", dv=42 km/s, 1sigma=0.9 mJy/b
Some evidence for a marginal HI detection, but very poor
UV coverage. Is there a single dish detection? Needs to
NGC 7173/6 (E+ pec/E pec:)
Environment: Compact Group HCG 90 = LGG 450. Also includes NGC 7172 (Sa pec
dustlane galaxy to the north, Sy2), and NGC 7174 (Sab pec to W of NGC 7176).
Group is X-ray source.
HI cube: R=1, 44"x38", dv=42 km/s, 1sigma=0.5 mJy/b
We detect HI in NGC 7172 only. Also observed with
ATCA by Tom Oosterloo.
HI in X-ray Ellipticals with Fine Structure
University of Central Lancashire (P.I.)
VLA D-array HI mapping in December 1997 of a sample of E's selected on
the following basis:
J. Hibbard, NRAO
HI Mapping of Five Fine-Structure Ellipticals (2003, AJ, 125, 667),
Cold & Hot Gas Content of Fine Structure E and S0 Galaxies
(2000, AJ, 120, 1946)
- High Fine Structure Index from Schweitzer & Seitzer 1992
- ROSAT X-ray observation with >100 counts
- Range of Lx/Lb (group 1=low Lx for Lb; group 3=high Lx for Lb)
NGC 3610 (E5:, Lx/Lb group 1)
Environment: group LGG 234 = NGC 3642 group
HI cube: R=1, 66"x49", dv=10.4 km/s, 1sigma=0.6 mJy/b
No HI detected in field. MHI(3sigma)= 8E6 Msun over 42 km/s.
NGC 3640 (E3, Lx/Lb group 3)
Environment: group LGG 233=NGC 3640 group
HI cube: R=1, 62"x49", dv=10.4 km/s, 1sigma=0.6 mJy/b
No HI detected in Elliptical. MHI(3sigma)= 7E6 Msun.
HI detected in edge-on dwarf spiral to NE (CGCG 039-149).
NGC 4382=M85 (S0+ pec, Lx/Lb group 1)
Environment: LGG 292 = Virgo I group
HI cube: R=1, 54"x50", dv=10.4 km/s, 1sigma=0.6 mJy/b
No HI in elliptical. MHI(3sigma)= 4E6 Msun. HI detected in
barred spiral NGC 4394 to East.
NGC 5322 (E3-4, Lx/Lb group 3)
Environment: Group LGG 360=NGC 5322 group
HI cube: R=1, 57"x50", dv=10.4 km/s, 1sigma=0.6 mJy/b
No HI detected in Elliptical. MHI(Ssigma)= 1E7 Msun.
2 companions detected: Im to NW (UGC 8714), dSp to SSE
(MCG +10-20-039). Extended radio continuum detected in
NGC 7626 (Epec:, Lx/Lb group 2)
Environment: LGG 473=Pegasus Group, or Pegasus I cluster. X-ray
source centered on NGC 7626; extended X-ray on NGC 7619.
HI cube: R=1, 55"x49", dv=10.5 km/s, 1sigma=0.5 mJy/b
External HI detected between NGC 7626 and NGC 7619. HI also detected in
Sb to East (NGC 7631). MHI(3sigma)= 2E7 Msun. Radio jet seen in continuum.
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Last modified: Mon Apr 14 15:22:59 EDT 2003