منابع مشابه
On the nature of zabs ≈ zem damped absorbers in quasar spectra
We present spectroscopic observations of the damped Lyα absorber at redshift z = 1.9342 seen in the spectrum of the quasar Q0151+048A. The redshift of the absorber is greater than the redshift of the quasar, so the system resembles the zabs ≈ zem damped absorber at z = 2.81 towards the quasar PKS0528-250. We have previously reported the detection of Lyα emission from the latter absorber, one of...
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متن کاملAstronomy and Astrophysics Identification of Absorbing Galaxies towards the Qso J2233–606 in the Hubble Deep Field South
We present spectroscopic observations of galaxies lying within 1 of QSO J2233–606 in the Hubble Deep Field South (HDF-S). Several are found to be coincident in redshift with absorption-line systems seen in the HST J2233–606 spectrum. We detect a new zem = 1.336 QSO with I = 20.8 at a projected angular separation of 44.5 (or ρ=200h kpc; q0 =0.5) from J2233–606. This QSO pair is an ideal target f...
متن کاملIdentification of absorbing galaxies towards the QSO J2233–606 in the Hubble Deep Field South
We present spectroscopic observations of galaxies lying within 1′ of QSO J2233–606 in the Hubble Deep Field South (HDF-S). Several are found to be coincident in redshift with absorption-line systems seen in the HST J2233–606 spectrum. We detect a new zem = 1.336 QSO with I = 20.8 at a projected angular separation of 44.5′′ (or ρ = 200h−1 kpc; q0=0.5) from J2233–606. This QSO pair is an ideal ta...
متن کامل0045-0002 Sreenath.indd
In the present chapter we discuss methodologies for the modelling, calibration and validation of cellular signalling pathway dynamics. The discussion begins with the typical range of techniques for modelling that might be employed to go from the chemical kinetics to a mathematical model of biochemical pathways. In particular, we consider the decision making processes involved in selecting the r...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1977
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/181.1.81p