Zobrazeno 1 - 10
of 44
pro vyhledávání: '"Aracil, Bastien"'
Autor:
Sentis, Matthias P.L., Aracil, Bastien, Lemahieu, Guillaume, Bouzaid, Matthieu, Brambilla, Giovanni, Meunier, Gérard
Publikováno v:
In Colloids and Surfaces A: Physicochemical and Engineering Aspects 20 April 2023 663
In their comment, Murphy et al. (arxiv:0708.3677) criticize the fitting procedure we used in two previous papers [Srianand et al. 2004(Paper I) and Chand et al. 2004 (Paper II)] and conclude that the above papers offers no stringent test to previous
Externí odkaz:
http://arxiv.org/abs/0711.1742
Publikováno v:
Astrophys.J. 643 (2006) L77-L82
The spectrum of the low-redshift QSO PG0953+415 shows two strong, intervening O VI absorption systems. To study the nature of these absorbers, we have used the Gemini Multiobject Spectrograph to conduct a deep spectroscopic galaxy redshift survey in
Externí odkaz:
http://arxiv.org/abs/astro-ph/0604415
Autor:
Chand, Hum, Srianand, Raghunathan, Petitjean, Patrick, Aracil, Bastien, Quast, Ralf, Reimers, Dieter
We present a detailed analysis of a very high resolution (R\approx 112,000) spectrum of the quasar HE 0515-4414 obtained using the High Accuracy Radial velocity Planet Searcher (HARPS) mounted on the ESO 3.6 m telescope at the La Silla observatory. T
Externí odkaz:
http://arxiv.org/abs/astro-ph/0601194
Autor:
Aracil, Bastien, Tripp, Todd M., Bowen, David V., Proschaska, Jason X., Chen, Hsiao-Wen, Frye, Brenda L.
Publikováno v:
Mon.Not.Roy.Astron.Soc.367:139-155,2006; Erratum-ibid.372:959,2006
We present high-resolution UV spectra of absorption-line systems toward the low-z QSO HS0624+6907 (z=0.3700). Coupled with spectroscopic galaxy redshifts, we find that many of these absorbers are integalactic gas clouds distributed within large-scale
Externí odkaz:
http://arxiv.org/abs/astro-ph/0512163
We report a new constraint on the variation of the fine-structure constant based on the analysis of 15 Si IV doublets selected from a ESO-UVES sample. We find \Delta\alpha/\alpha = (+0.15+/-0.43) x 10^-5 over a redshift range of 1.59< z < 2.92 which
Externí odkaz:
http://arxiv.org/abs/astro-ph/0408200
Autor:
Tripp, Todd M., Jenkins, Edward B., Bowen, David V., Prochaska, Jason X., Aracil, Bastien, Ganguly, Rajib
Publikováno v:
Astrophys.J.619:714-732,2005
We present a new UV echelle spectrum of PG1216+069, obtained with HST+STIS, which reveals damped Lya (DLA) absorption as well as O I, C II, Si II, and Fe II absorption lines at z(abs) = 0.00632 near the NGC4261 group. The absorber shows no evidence o
Externí odkaz:
http://arxiv.org/abs/astro-ph/0407465
Publikováno v:
Phys.Rev.Lett.92:121302,2004
Most of the successful physical theories rely on the constancy of few fundamental quantities (such as the speed of light, $c$, the fine-structure constant, \alpha, the proton to electron mass ratio, \mu, etc), and constraining the possible time varia
Externí odkaz:
http://arxiv.org/abs/astro-ph/0402177
Publikováno v:
Astron.Astrophys. 417 (2004) 443-450
We use 29 z>4 quasar spectra to build a homogeneous sample of high-redshift CIV absorbers. We use these data to calculate the number density, n(z), of W_rest(CIV)>0.30 A CIV doublets. We find that n(z) increases with time from z ~ 4.5. In addition, W
Externí odkaz:
http://arxiv.org/abs/astro-ph/0312412
Autor:
Ellison, Sara L., Ibata, Rodrigo, Pettini, Max, Lewis, Geraint F., Aracil, Bastien, Petitjean, Patrick, Srianand, R.
Publikováno v:
Astron.Astrophys. 414 (2004) 79-93
We have obtained spatially resolved spectra of the z=3.911 triply imaged QSO APM08279+5255 using the Space Telescope Imaging Spectrograph (STIS) on board the Hubble Space Telescope (HST). We study the line of sight equivalent width (EW) differences a
Externí odkaz:
http://arxiv.org/abs/astro-ph/0310221