The nature of the Lyman-alpha emission region of FDF-4691

Abstract

In order to study the origin of the strong Lyman-alpha emission of high-redshift starburst galaxies we observed and modeled the emission of the z = 3.304 galaxy FDF-4691 (rest-frame EW = 103 Angstroem). The observations show that FDF-4691 is a young starburst galaxy with a (for this redshift) typical metallicity. The broad, double-peaked profile of the Lyman-alpha emission line can be explained assuming a highly turbulent emission region in the inner part of the starburst galaxy, and a surrounding extended shell of low-density neutral gas with a normal dust/gas ratio and with Galactic dust properties. The detection of the Lyman-alpha emission line is explained by the intrinsic broad Lyman-alpha emission and a low HI column density of the neutral shell. A low dust/gas ratio in the neutral shell is not needed to explain the strong Lyman-alpha line.

arXiv commentAccepted for publication in A&A Letters

References in corpus (15)

• Star Formation in Galaxies Along the Hubble Sequence
• The Dust Content and Opacity of Actively Star-Forming Galaxies
• Starburst99: Synthesis Models for Galaxies with Active Star Formation
• Rest-Frame Ultraviolet Spectra of z~3 Lyman Break Galaxies
• First Results from the Large Area Lyman Alpha Survey
• Discovery of 9 Ly alpha emitters at redshift z~3.1 using narrow-band imaging and VLT spectroscopy
• The evolution of superbubbles and the detection of Lyman alpha in star-forming galaxies
• Lyman alpha emission in starbursts: implications for galaxies at high redshift
• An Extremely Luminous Galaxy at z=5.74
• A Galactic Wind at z = 5.190
• The FORS Deep Field: Field selection, photometric observations and photometric catalog
• P-Cygni Type Lya from Starburst Galaxies
• Lyman alpha line formation in starbursting galaxies I. Moderately thick, dustless, and static HI media
• Evidence for chemical evolution in the spectra of high redshift galaxies
• Radiative Transfer with Finite Elements II. Ly-alpha Line Transfer in Moving Media

Cited by in corpus (18)

• 3D Lyman-alpha radiation transfer. I. Understanding Lyman-alpha line profile morphologies
• Protoclusters associated with z > 2 radio galaxies. I. Characteristics of high redshift protoclusters
• Properties of Ly-alpha emitters around the radio galaxy MRC 0316-257
• 3D Lyman-alpha radiation transfer. III. Constraints on gas and stellar properties of z~3 Lyman break galaxies (LBG) and implications for high-z LBGs and Lyman-alpha emitters(LAEs)
• Lyman alpha Radiative Transfer in Cosmological Simulations using Adaptive Mesh Refinement
• Lyman alpha emission in high-redshift galaxies
• The physical properties of Lyalpha emitting galaxies: not just primeval galaxies?
• Physical properties of z~4 LBGs: differences between galaxies with and without Ly-alpha emission
• The FORS Deep Field Spectroscopic Survey
• Simulating the diversity of shapes of the Lyman-$\alpha$ line
• Modelling high redshift Lyman-alpha Emitters
• Lyman Break Galaxies at z~1.8-2.8: GALEX/NUV Imaging of the Subaru Deep Field
• Lyman Alpha and MgII as Probes of Galaxies and their Environments
• Lyman-alpha radiative transfer: Modeling spectrum and surface brightness profile of Lyman-alpha emitting galaxies at z=3-6
• Galactic Wind Shells and High Redshift Radio Galaxies On the Nature of Associated Absorbers
• Tunable filter imaging of high redshift quasar fields
• Medium-resolution spectroscopy of galaxies with redshifts 2.3 < z < 3.5
• A galaxy populations study of a radio-selected protocluster at z~3.1