2010ApJ...716L..14H

Query : 2010ApJ...716L..14H

2010ApJ...716L..14H - Astrophys. J., 716, L14-L18 (2010/June-2)

IC 3418: star formation in a turbulent wake.

HESTER J.A., SEIBERT M., NEILL J.D., WYDER T.K., GIL DE PAZ A., MADORE B.F., MARTIN D.C., SCHIMINOVICH D. and RICH R.M.

Abstract (from CDS):

Galaxy Evolution Explorer observations of IC 3418, a low surface brightness galaxy in the Virgo Cluster, revealed a striking 17 kpc UV tail of bright knots and diffuse emission. Hα imaging confirms that star formation is ongoing in the tail. IC 3418 was likely recently ram pressure stripped on its first pass through Virgo. We suggest that star formation is occurring in molecular clouds that formed in IC 3418's turbulent stripped wake. Tides and ram pressure stripping (RPS) of molecular clouds are both disfavored as tail formation mechanisms. The tail is similar to the few other observed star-forming tails, all of which likely formed during RPS. The tails' morphologies reflect the forces present during their formation and can be used to test for dynamical coupling between molecular and diffuse gas, thereby probing the origin of the star-forming molecular gas.

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Journal keyword(s): galaxies: clusters: individual: Virgo - galaxies: individual: IC 3418 - ultraviolet: galaxies

Nomenclature: Fig. 1, Table 1: [HSN2010] aN (Nos k1-k9, d1-d3).

Simbad objects: 23

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Number of rows : 23
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 ACO 1367 ClG 11 44 44.6 +19 41 59           ~ 1077 1
2 NGC 4402 GiP 12 26 07.65312 +13 06 47.9376   12.55       ~ 403 2
3 NAME Virgo Cluster ClG 12 26 32.1 +12 43 24           ~ 6647 0
4 SDSS J122942.96+104525.0 Sy2 12 29 42.9615849624 +10 45 24.913701540           ~ 88 0
5 IC 3418 LIN 12 29 43.919 +11 24 16.87   16.5       ~ 118 1
6 [HSN2010] d1 UV 12 29 46.570 +11 23 10.86           ~ 1 0
7 [HSN2010] k1 UV 12 29 46.880 +11 23 04.86           ~ 1 0
8 [HSN2010] k2 UV 12 29 47.590 +11 23 33.36           ~ 1 0
9 [HSN2010] k3 UV 12 29 49.840 +11 23 06.36           ~ 1 0
10 [HSN2010] d2 UV 12 29 50.650 +11 22 52.85           ~ 1 0
11 [HSN2010] k4 UV 12 29 50.750 +11 22 36.35           ~ 2 0
12 [HSN2010] k6 UV 12 29 52.290 +11 22 04.86           ~ 2 0
13 [HSN2010] k5 UV 12 29 52.590 +11 22 49.85           ~ 2 0
14 [HSN2010] d3 UV 12 29 52.790 +11 22 27.35           ~ 2 0
15 [HSN2010] k7 UV 12 29 52.900 +11 21 54.35           ~ 1 0
16 [HSN2010] k8 UV 12 29 53.920 +11 22 01.85           ~ 2 0
17 [HSN2010] k9 UV 12 29 54.530 +11 21 46.85           ~ 1 0
18 LEDA 126817 GiC 12 58 42.589 +27 45 37.78           ~ 51 0
19 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 4804 2
20 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1125 0
21 ESO 137-1 AG? 16 13 27.305 -60 45 50.59   14.84   13.87   ~ 117 0
22 ACO 3627 ClG 16 14 22.5 -60 52 07           ~ 297 2
23 ACO 2667 ClG 23 51 39.37 -26 05 02.7           ~ 175 0

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