Probing the circumgalactic medium at high-redshift using composite BOSS spectra of strong Lyman α forest absorbers

Probing the circumgalactic medium at high-redshift using composite BOSS spectra of strong Lyman α forest absorbers

We present composite spectra constructed from a sample of 242 150 Lyman α (Lyα) forest absorbers at redshifts 2.4 < z < 3.1 identified in quasar spectra from the Baryon Oscillation Spectroscopic Survey (BOSS) as part of Data Release 9 of the Sloan Digital Sky Survey III. We select forest absor...

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Veröffentlicht in:Monthly notices of the Royal Astronomical Society 2014-06, Vol.441 (2), p.1718-1740
Hauptverfasser: Pieri, Matthew M., Mortonson, Michael J., Frank, Stephan, Crighton, Neil, Weinberg, David H., Lee, Khee-Gan, Noterdaeme, Pasquier, Bailey, Stephen, Busca, Nicolas, Ge, Jian, Kirkby, David, Lundgren, Britt, Mathur, Smita, Pâris, Isabelle, Palanque-Delabrouille, Nathalie, Petitjean, Patrick, Rich, James, Ross, Nicholas P., Schneider, Donald P., York, Donald G.
Format: Artikel
Sprache:eng
Schlagworte:
Astrophysics
Cosmology and Extra-Galactic Astrophysics
Physics
Sciences of the Universe
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Zusammenfassung:We present composite spectra constructed from a sample of 242 150 Lyman α (Lyα) forest absorbers at redshifts 2.4 < z < 3.1 identified in quasar spectra from the Baryon Oscillation Spectroscopic Survey (BOSS) as part of Data Release 9 of the Sloan Digital Sky Survey III. We select forest absorbers by their flux in bins 138 km s−1 wide (approximately the size of the BOSS resolution element). We split these absorbers into five samples spanning the range of flux −0.05 ≤ F < 0.45. Tests on a smaller set of high-resolution spectra show that our three strongest absorption samples would probe circumgalactic regions (projected separation
ISSN:0035-8711
1365-2966
DOI:10.1093/mnras/stu577