Zobrazeno 1 - 10
of 58
pro vyhledávání: '"James T. Lauroesch"'
Autor:
James T. Lauroesch, Celine Peroux, Varsha P. Kulkarni, Debopam Som, Pushpa Khare, Donald G. York, Joseph D. Meiring
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 435:1469-1485
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:
https://explore.openaire.eu/search/publication?articleId=doi_________::cc27e545460a5566d9839be44fb00f65
https://doi.org/10.1093/mnras/stt1388
https://doi.org/10.1093/mnras/stt1388
Autor:
Glenn Schneider, Th. Henning, Alexander Brown, J. M. Brown, Bruce E. Woodgate, John P. Wisniewski, Sean D. Brittain, Jeremy R. Swearingen, Daniel Apai, Carol A. Grady, F. M. Walter, Kenji Hamaguchi, Robert Petre, David K. Lynch, Jeremy Hornbeck, Gerard M. Williger, Elizabeth H. Champney, Michael L. Sitko, Ray W. Russell, James T. Lauroesch, Marshall D. Perrin
We have imaged GM Aur with HST, detected its disk in scattered light at 1400A and 1650A, and compared these with observations at 3300A, 5550A, 1.1 microns, and 1.6 microns. The scattered light increases at shorter wavelengths. The radial surface brig
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::10dd4fd4cd2954cc18ddd518a0b9cce4
http://arxiv.org/abs/1607.03520
http://arxiv.org/abs/1607.03520
We discuss the thermal pressures ($n_H T$) in predominantly cold, neutral interstellar gas in the Magellanic Clouds, derived from analyses of the fine-structure excitation of neutral carbon, as seen in high-resolution HST/STIS spectra of seven divers
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c440bf5c69919299a695054476e130a7
http://arxiv.org/abs/1603.03801
http://arxiv.org/abs/1603.03801
Autor:
L. Haberzettl, Joseph D. Meiring, James T. Lauroesch, Varsha P. Kulkarni, Pushpa Khare, Donald G. York, Celine Peroux
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 410:2516-2525
We present deep ground based imaging of the environments of five QSOs that contain sub-Damped Lyman-alpha systems at z L* galaxies for four of the five fields within 10" of the QSO. In contrast to previous imaging surveys of DLA systems at these reds
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5528ca01e68db8692af3edc540aea54a
https://doi.org/10.1111/j.1365-2966.2010.17625.x
https://doi.org/10.1111/j.1365-2966.2010.17625.x
Autor:
Varsha P. Kulkarni, Joseph D. Meiring, James T. Lauroesch, Pushpa Khare, Donald G. York, Celine Peroux
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 397:2037-2048
We have combined the results from our recent observations of Damped and sub-Damped Lyman-alpha systems with the MIKE and UVES spectrographs on the Magellan Clay and VLT Kueyen telescopes with ones from the literature to determine the N(HI)-weighted m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b0110f8dd6f57ac136621ca321e5f40
https://doi.org/10.1111/j.1365-2966.2009.15064.x
https://doi.org/10.1111/j.1365-2966.2009.15064.x
Autor:
Joseph D. Meiring, James T. Lauroesch, Donald G. York, Pushpa Khare, Celine Peroux, Varsha P. Kulkarni
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 393:1513-1530
The Damped and sub-Damped Lyman-alpha (DLA and sub-DLA) systems seen in the spectra of QSOs offer a unique way to study the interstellar medium of high redshift galaxies. In this paper we report on new abundance determinations in a sample of 10 new s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::585c43001ff8eac6c7ce25b55b4ccd1f
https://doi.org/10.1111/j.1365-2966.2008.14253.x
https://doi.org/10.1111/j.1365-2966.2008.14253.x
Autor:
Christopher Stoughton, Josh Frieman, James T. Lauroesch, D. P. Schneider, Varsha P. Kulkarni, D. G. York, Y. Alsayyad, Johnny Vanlandingham, Timothy M. Heckman, S. B. Anderson, Britt Lundgren, Gordon T. Richards, Arlin P. S. Crotts, M. Subbarao, P. Khare, A. Meiksin, P. B. Hall, D. E. vanden Berk, M. Steffing
Publikováno v:
The Astrophysical Journal. 679:239-259
We have studied a sample of 415 associated (z_ab z_em; relative velocity with respect to QSO 3000km/s), so as to understand their origin. From the analysis of the composite spectra, as well as from the comparison of measured equivalent widths in indi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a858ccab4a14e4e1ca0c8ab8a6c815a3
https://doi.org/10.1086/587122
https://doi.org/10.1086/587122
Autor:
Varsha P. Kulkarni, Joseph D. Meiring, James T. Lauroesch, Celine Peroux, Pushpa Khare, Donald G. York
Publikováno v:
The Astrophysical Journal. 661:88-94
Observations of low mean metallicity of damped Lyman-alpha (DLA) quasar absorbers at all redshifts studied appear to contradict the predictions for the global mean interstellar metallicity in galaxies from cosmic chemical evolution models. On the oth
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e9975f41d5a6cac5ef921e75cf7a6ac0
https://doi.org/10.1086/515430
https://doi.org/10.1086/515430
Publikováno v:
The Astrophysical Journal. 659:441-446
We report interstellar FeII and SiII column densities toward six translucent sight lines (A_V >~ 1) observed with the Space Telescope Imaging Spectrograph (STIS). The abundances were determined from the absorption of SiII] at 2335 Angstroms, and seve
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b61698e42d1c1418802309ed07c47526
https://doi.org/10.1086/512178
https://doi.org/10.1086/512178
Autor:
James T. Lauroesch, Joseph D. Meiring, Celine Peroux, Varsha P. Kulkarni, Donald G. York, Pushpa Khare
Publikováno v:
Astronomy & Astrophysics. 464:487-493
We present arguments based on the measured abundances in individual damped Lyman alpha systems (DLAs) and sub-damped Lyman alpha systems (sub-DLAs), and also the average abundances inferred in large samples of QSO absorption line systems, to suggest
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aa74016cbffede9aa410888712678e0d
https://doi.org/10.1051/0004-6361:20066186
https://doi.org/10.1051/0004-6361:20066186