Extended Lyα Nebulae at z sime 2.3: An Extremely Rare and Strongly Clustered Population?

Citation:

Yang Y, Zabludoff A, Tremonti C, Eisenstein D, Davé R. Extended Lyα Nebulae at z sime 2.3: An Extremely Rare and Strongly Clustered Population?. The Astrophysical Journal. 2009;693 :1579-1587.

Date Published:

March 1, 2009

Abstract:

To obtain an unbiased sample of bright Lyα blobs (L_{Lyα}≳ 10^{43} erg s-1), we have undertaken a blind,wide-field, narrowband imaging survey in the National Optical AstronomyObservatory Deep Wide Field Survey Boötes field with the StewardBok 2.3 m telescope. After searching over 4.82 deg2 at z =2.3, we discover four Lyα blobs with L_{Lyα} = 1.6-5.3× 1043 erg s-1, isophotal areas of 28-57⊓⊔, and broad Lyα line profiles (Δv = 900-1250km s-1). In contrast with the extended Lyα halosassociated with high-z radio galaxies, none of our four blobs areradio-loud. The X-ray luminosities and optical spectra of these blobsare diverse. Two blobs (3 and 4) are X-ray detected with LX(2-7 keV) = 2-4 × 1044 erg s-1 and havebroad optical emission lines (C IV) characteristic of active galactic

Notes:

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