Zobrazeno 1 - 10
of 130
pro vyhledávání: '"Khare, Pushpa"'
Autor:
Som, Debopam, Kulkarni, Varsha P., Meiring, Joseph, York, Donald G., Péroux, Celine, Lauroesch, James T., Aller, Monique C., Khare, Pushpa
We report observations of four sub-damped Lyman-alpha (sub-DLA) quasar absorbers at z<0.5 obtained with the Hubble Space Telescope Cosmic Origins Spectrograph. We measure the available neutrals or ions of C, N, O, Si, P, S, Ar, Mn, Fe, and/or Ni. Our
Externí odkaz:
http://arxiv.org/abs/1502.01989
Autor:
Straka, Lorrie, Noterdaeme, Pasquier, Srianand, Raghunathan, Nutalaya, Songkiat, Kulkarni, Varsha P., Khare, Pushpa, Bowen, David, Bishof, Michael, York, Donald G.
Publikováno v:
2015MNRAS.447.3856S
We present photometric and spectroscopic measurements of 53 QSO-galaxy pairs from the Sloan Digital Sky Survey, where nebular emission lines from a 0
Externí odkaz:
http://arxiv.org/abs/1412.6661
We studied dust reddening and [O II] emission in 1730 Mg II associated absorption systems (AAS; relative velocity with respect to QSOs, < 3000 km/s; in units of velocity of light, \b{eta}, < 0.01) with 0.4 < z_abs < 2 in the SDSS DR7, focusing on the
Externí odkaz:
http://arxiv.org/abs/1408.4458
Autor:
Straka, Lorrie, Whichard, Zakary L., Kulkarni, Varsha P., Bishof, Michael, Bowen, David, Khare, Pushpa, York, Donald G.
We have improved upon our previous search technique of systematically searching QSO spectra for narrow galactic H-alpha emission, which indicates a foreground galaxy within the Sloan Digital Sky Survey (SDSS) spectral fiber. We now search for H-alpha
Externí odkaz:
http://arxiv.org/abs/1310.4207
Autor:
Som, Debopam, Kulkarni, Varsha P., Meiring, Joseph, York, Donald G., Péroux, Celine, Khare, Pushpa, Lauroesch, James T.
We present chemical abundance measurements from high-resolution observations of 5 sub-damped Lyman-alpha absorbers at 1.7 < z < 2.4 observed with the Magellan Inamori Kyocera Echelle (MIKE) spectrograph on the 6.5-m Magellan II Clay telescope. Lines
Externí odkaz:
http://arxiv.org/abs/1307.7103
Autor:
York, Donald G., Straka, Lorrie A., Bishof, Michael, Kuttruff, Seth, Bowen, David, Kulkarni, Varsha P., Subbarao, Mark, Richards, Gordon, Berk, Daniel Vanden, Hall, Patrick B., Heckman, Timothy, Khare, Pushpa, Quashnock, Jean, Ghering, Lara, Johnson, Sean
A search for emission lines in foreground galaxies in quasar spectra (z(gal) < z(QSO)) of the Sloan Digital Sky Survey (SDSS) data release 5 (DR5) reveals 23 examples of quasars shining through low redshift, foreground galaxies at small impact parame
Externí odkaz:
http://arxiv.org/abs/1204.5786
Autor:
Kulkarni, Varsha P., Meiring, Joseph, Som, Debopam, Peroux, Celine, York, Donald G., Khare, Pushpa, Lauroesch, James T.
We report the discovery of a "super-damped" Lyman-alpha absorber at $z_{abs}=2.2068$ toward QSO Q1135-0010 in the Sloan Digital Sky Survey, and follow-up VLT UVES spectroscopy. Voigt profile fit to the DLA line indicates log $N_{\rm H I} = 22.05 \pm
Externí odkaz:
http://arxiv.org/abs/1202.0882
We have studied a sample of 1084 intervening absorption systems with 2.15$\le z_{ab}\le$5.2, having log(N$_{\rm HI}$) $>$ 20.0 in the spectra of QSOs in Sloan Digital Sky Survey (SDSS) data release 7 (DR7), with the aim of understanding the nature an
Externí odkaz:
http://arxiv.org/abs/1109.4225
Autor:
Meiring, Joseph D., Lauroesch, James T., Haberzettl, Lutz, Kulkarni, Varsha P., Peroux, Celine, Khare, Pushpa, York, Donald G.
We present deep ground based imaging of the environments of five QSOs that contain sub-Damped Lyman-alpha systems at z<1 with the SOAR telescope and SOI camera. We detect a clear surplus of galaxies in these small fields, supporting the assumption th
Externí odkaz:
http://arxiv.org/abs/1009.0223