Extended Tidal Structure in Two Lyα‐emitting Starburst Galaxies | Zendy

John M. Can | Zendy; Evan D. Skillman | Zendy; D. Kunth | Zendy; Claus Leitherer | Zendy; J. M. Más-Hesse | Zendy; Göran Östlin | Zendy; А. Р. Петросян | Zendy

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Extended Tidal Structure in Two Lyα‐emitting Starburst Galaxies

Author(s) -

John M. Can,

Evan D. Skillman,

D. Kunth,

Claus Leitherer,

J. M. Más-Hesse,

Göran Östlin,

А. Р. Петросян

Publication year - 2004

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/420868

Subject(s) - physics , astrophysics , galaxy , interstellar medium , star formation , astronomy , emission spectrum , spectral line

We present new VLA C-configuration HI imaging of the Lyman Alpha-emittingstarburst galaxies Tol 1924-416 and IRAS 08339+6517. The effective resolutionprobes neutral gas structures larger than 4.7 kpc in Tol 1924-416, and largerthan 8.1 kpc in IRAS 08339+6517. Both systems are revealed to be tidallyinteracting: Tol 1924-416 with ESO 338-IG04B (6.6 arcminutes = 72 kpc minimumseparation), and IRAS 08339+6517 with 2MASX J08380769+6508579 (2.4 arcminutes =56 kpc minimum separation). The HI emission is extended in these systems, withtidal tails and debris between the target galaxies and their companions. SinceLyman Alpha emission has been detected from both of these primary systems,these observations suggest that the geometry of the ISM is one of the factorsaffecting the escape fraction of Lyman Alpha emission from starburstenvironments. Furthermore, these observations argue for the importance ofinteractions in triggering massive star formation events.Comment: ApJ, in press; 11 pages, 2 color figure

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