CONSTRAINING DUST AND MOLECULAR GAS PROPERTIES IN Ly[alpha] BLOBS AT z ~ 3
In order to constrain the bolometric luminosities, dust properties, and molecular gas content of giant Ly[alpha] nebulae, the so-called Ly[alpha] blobs, we have carried out a study of dust continuum and CO line emission in two well-studied representatives of this population at z ~ 3: an Ly[alpha] bl...
Gespeichert in:
Veröffentlicht in: | Astrophysical journal. Letters 2012-01, Vol.744 (2), p.1-9 |
---|---|
Hauptverfasser: | , , , , , , , , , , , , , , , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | In order to constrain the bolometric luminosities, dust properties, and molecular gas content of giant Ly[alpha] nebulae, the so-called Ly[alpha] blobs, we have carried out a study of dust continuum and CO line emission in two well-studied representatives of this population at z ~ 3: an Ly[alpha] blob discovered by its strong Spitzer Multiband Infrared Photometer 24 [mu]m detection (LABd05) and the Steidel blob 1 (SSA22-LAB01). We find that the spectral energy distribution of LABd05 is well described by an active-galactic-nucleus-starburst composite template with L sub(FIR) = (4.0 + or - 0.5) x 10 super(12) L sub([sm circle in circle]), comparable to high-z submillimeter galaxies and ultraluminous infrared galaxies. New Large APEX Bolometer Camera 870 [mu]m measurements rule out the reported Submillimeter Common-User Bolometer Array detection of the SSA22-LAB01 (S sub(850 [mu]m) = 16.8 mJy) at the >4[sigma] level. Consistent with this, ultradeep Plateau de Bure Interferometer observations with ~2" spatial resolution also fail to detect any 1.2 mm continuum source down to [approx =]0.45 mJy beam super(-1) (3[sigma]). Combined with the existing (sub)millimeter observations in the literature, we conclude that the FIR luminosity of SSA22-LAB01 remains uncertain. No CO line is detected in either case down to integrated flux limits of S sub(v)[Delta]V [ |
---|---|
ISSN: | 2041-8205 0004-637X 2041-8213 1538-4357 |
DOI: | 10.1088/0004-637X/744/2/178 |