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IC 3418: Star Formation in a Turbulent Wake

Hester, Janice A. and Seibert, Mark and Neill, James D. and Wyder, Ted K. and Gil de Paz, Armando and Madore, Barry F. and Martin, D. Christopher and Schiminovich, David and Rich, R. Michael (2010) IC 3418: Star Formation in a Turbulent Wake. Astrophysical Journal Letters, 716 (1). L14-L18. ISSN 2041-8205.

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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.

Item Type:Article
Related URLs:
URLURL TypeDescription
Seibert, Mark0000-0002-1143-5515
Neill, James D.0000-0002-0466-1119
Gil de Paz, Armando0000-0001-6150-2854
Madore, Barry F.0000-0002-1576-1676
Martin, D. Christopher0000-0002-8650-1644
Rich, R. Michael0000-0003-0427-8387
Additional Information:© 2010 American Astronomical Society. Received 2010 February 22; accepted 2010 May 6; published 2010 May 19. This research has made use of the GOLD Mine Database and of the NASA/IPAC Extragalactic Database (NED) which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. The authors thank L. Cortese for helpful comments.
Group:Space Astrophysics Laboratory
Subject Keywords:galaxies: clusters: individual (Virgo); galaxies: individual (IC 3418); ultraviolet: galaxies
Issue or Number:1
Classification Code:PACS: 97.10.Bt; 98.65.Cw; 98.58.Ay; 98.58.Nk; 95.85.Mt; 98.58.Db
Record Number:CaltechAUTHORS:20100630-140822183
Persistent URL:
Official Citation:Janice A. Hester et al 2010 ApJ 716 L14 doi: 10.1088/2041-8205/716/1/L14
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:18879
Deposited By: Jason Perez
Deposited On:30 Jun 2010 22:49
Last Modified:09 Mar 2020 20:54

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