output
19932026
most citedThe Seventh Data Release of the Sloan Digital Sky Survey

5.4k citations

Showing 2009 · astro-ph.COShow all

26 papers · 2 filters

astro-ph.CO2009★ 1 cited

A Multiwavelength Study of a Young, Z-shaped, FR I Radio Galaxy NGC 3801

Ananda Hota, Jeremy Lim, Youichi Ohyama +3

We present preliminary results from a multi-wavelength study of a merger candidate, NGC3801, hosting a young FR I radio galaxy, with a Z-shaped structure. Analysing archival data f…

astro-ph.CO2009★ 30 cited

New searches for HI 21-cm in damped Lyman-alpha absorption systems

S. J. Curran, P. Tzanavaris, J. K. Darling +4

We present the results of three separate searches for HI 21-cm absorption in a total of twelve damped Lyman-alpha absorption systems (DLAs) and sub-DLAs over the redshift range z =…

astro-ph.CO2009★ 19 cited

HI gas in the rejuvenated radio galaxy 4C29.30

Yogesh Chandola, D. J. Saikia, Neeraj Gupta

We report the results of our observations of HI absorption towards the central region of the rejuvenated radio galaxy 4C29.30 (J0840+2949) with the Giant Metrewave Radio Telescope…

astro-ph.CO2009★ 7 cited

VLBA polarimetric observations of the CSS quasar 3C147

A. Rossetti, F. Mantovani, D. Dallacasa +3

Aims. We report new VLBA polarimetric observations of the compact steep-spectrum (CSS) quasar 3C147 (B0538+498) at 5 and 8.4GHz. Methods. By using multifrequency VLBA observations,…

astro-ph.CO2009★ 13 cited

Optical variability of radio-intermediate quasars

Arti Goyal, Gopal-Krishna, S. Joshi +4

We report the results of our intensive intranight optical monitoring of 8 `radio-intermediate quasars' (RIQs) having flat or inverted radio spectra. The monitoring was carried out…

astro-ph.CO2009★ 36 cited

A metallicity-spin temperature relation in damped Lyman- systems

Nissim Kanekar, Alain Smette, Frank H. Briggs +1

We report evidence for an anti-correlation between spin temperature and metallicity [Z/H], detected at significance in a sample of 26 damped Lyman- absorbers (DLAs…