Zobrazeno 1 - 10
of 48
pro vyhledávání: '"Giroux, M. L."'
Since the 1980's discovery of the large (2x10^9 Msun) intergalactic cloud known as the Leo Ring, this object has been the center of a lively debate about its origin. Determining the origin of this object is still important as we develop a deeper unde
Externí odkaz:
http://arxiv.org/abs/1406.1699
A number of substellar companions to evolved cool stars have now been reported. Cool giants are distinct from their progenitor Main Sequence (MS) low-mass stars in a number of ways. First, the mass loss rates of cool giant stars are orders of magnitu
Externí odkaz:
http://arxiv.org/abs/0911.1738
Tidal Dwarf Galaxies (TDG), concentrations of interstellar gas and stars in the tidal features of interacting galaxies, have been the subject of much scrutiny. The `smoking gun' that will prove the TDG hypothesis is the discovery of independent dwarf
Externí odkaz:
http://arxiv.org/abs/0908.1424
We present an empirical assessment of the use of broadband optical colours as age indicators for unresolved extragalactic clusters and investigate stochastic sampling effects on integrated colours. We use the integrated properties of Galactic open cl
Externí odkaz:
http://arxiv.org/abs/0807.1862
Autor:
Smith, B. J., Struck, C., Hancock, M., Giroux, M. L., Appleton, P. N., Charmandaris, V., Reach, W., Hurlock, S., Hwang, J. -S.
We present Spitzer infrared, GALEX UV, and SDSS and SARA optical images of the peculiar interacting galaxy pair Arp 285 (NGC 2856/4), and compare with a new numerical model of the interaction. We estimate the ages of clumps of star formation in these
Externí odkaz:
http://arxiv.org/abs/0803.4218
Publikováno v:
Astrophys.J.657:271-285,2007
We analyze HST and FUSE ultraviolet spectroscopic data for eleven sight lines passing through the infalling high velocity cloud (HVC) Complex C. These sight lines pass through regions with HI column densities ranging from N(HI) = 10^(18.1) to 10^(20.
Externí odkaz:
http://arxiv.org/abs/astro-ph/0610729
Autor:
Fechner, C., Reimers, D., Kriss, G. A., Baade, R., Blair, W. P., Giroux, M. L., Green, R. F., Moos, H. W., Morton, D. C., Scott, J. E., Shull, J. M., Simcoe, R., Songaila, A., Zheng, W.
We present the far-UV spectrum of the quasar HS1700+6416 taken with FUSE. This QSO provides the second line of sight with the HeII absorption resolved into a Ly alpha forest structure. Since HS1700+6416 is slightly less redshifted (z=2.72) than HE234
Externí odkaz:
http://arxiv.org/abs/astro-ph/0605150
Publikováno v:
Astrophys.J. 623 (2005) 196-212
We use spectroscopic data from HST and FUSE to study the wide range of ionization states of the "highly ionized high-velocity clouds". Studied extensively in OVI absorption, these clouds are usually assumed to be infalling gas in the Galactic halo at
Externí odkaz:
http://arxiv.org/abs/astro-ph/0501061
Publikováno v:
Astrophys.J. 609 (2004) 94
We report the discovery of a dwarf (M_B = -13.9) post-starburst galaxy coincident in recession velocity (within uncertainties) with the highest column density absorber (N_HI = 10^15.85 cm^{-2} at cz = 1586 km/s) in the 3C~273 sightline. This galaxy i
Externí odkaz:
http://arxiv.org/abs/astro-ph/0403042
Autor:
Zheng, W., Kriss, G. A., Deharveng, J. -M., Dixon, W. V., Kruk, J. W., Shull, J. M., Giroux, M. L., Morton, D. C., Williger, G. M., Friedman, S. D., Moos, H. W.
Publikováno v:
Astrophys.J. 605 (2004) 631-644
We obtained high-resolution VLT and FUSE spectra of the quasar HE2347-4342 to study the properties of the intergalactic medium between redshifts z=2.0-2.9. The high-quality optical spectrum allows us to identify approximately 850 HeII absorption comp
Externí odkaz:
http://arxiv.org/abs/astro-ph/0312557