activity
19942026
most citedNew light on the search for low metallicity galaxies I. The N2 method

453 citations · 5.6k across the 136 of their papers we have counts for

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Showing 1997Show all

8 papers · 1 filter

astro-ph1997

The colours of z=2 QSO host galaxies

I. Aretxaga, R. J. Terlevich, B. J. Boyle

Three high-redshift (z=2) and high luminosity (M_B < -28 mag for Ho = 50, qo=0.5) QSOs, two radio-quiet one radio-loud, were imaged in R, I and K bands. The luminosities, colours a…

astro-ph1997★ 23 cited

Multicolour imaging of z= 2 QSO hosts

I. Aretxaga, R. J. Terlevich, B. J. Boyle

We present multicolour images of the hosts of three z=2 QSOs previously detected in R-band by our group. The luminosities, colours and sizes of the hosts overlap with those of acti…

astro-ph1997★ 118 cited

The cosmological evolution of the QSO luminosity density and of the star formation rate

B. J. Boyle, Roberto Terlevich

We demonstrate that the evolution of the QSO luminosity density with epoch displays a striking similarity to the cosmological evolution of the field galaxy star formation rate, rec…

astro-ph1997★ 18 cited

Patterns and Coincidences in the Light Curves of Active Galaxies

R. Cid Fernandes, R. Terlevich, I. Aretxaga

We draw attention to some intriguing coincident patterns in the optical light curves of NGC 4151 and NGC 5548. Inspecting the light curves of these two classic Seyferts, we find ev…

astro-ph1997★ 106 cited

New diagnostic methods for emission-line galaxies in deep surveys

Claudia S. Rola, Elena Terlevich, Roberto J. Terlevich

We present new quantitative classification methods for emission-line galaxies, which are specially designed to be used in deep galaxy redshift surveys. A good segregation between s…

astro-ph1997★ 15 cited

A New Superwind Wolf-Rayet Galaxy Mrk 1259

Y. Ohyama, Y. Taniguchi, R. Terlevich

We report the discovery of a starburst-driven wind (superwind) from the starburst nucleus galaxy Mrk 1259. The estimated number ratio of Wolf-Rayet (WR) to O stars amounts to ~0.09…

astro-ph1997

The hosts of QSOs

Itziar Aretxaga, Brian J. Boyle, Roberto J. Terlevich

We present results of the hosts of four high-redshift () and high luminosity ($M_B \lsim -28$ mag) QSOs, three radio-quiet one radio-loud, imaged in R and K bands. The…

astro-ph1997★ 94 cited

The Morphology of HII Galaxies

Eduardo Telles, Jorge Melnick, Roberto Terlevich

We present CCD images of a sample of 39 HII galaxies taken at the Danish 1.54m telescope on La Silla. The images are used to analyse the morphology of these emission line dwarfs, a…