Zobrazeno 1 - 10
of 69
pro vyhledávání: '"Straka, Lorrie"'
Autor:
Rubin, Kate H. R., Juarez, Christian, Cooksey, Kathy L., Werk, Jessica K., Prochaska, J. Xavier, O'Meara, John M., Burchett, Joseph N., Vaught, Ryan J. Rickards, Kulkarni, Varsha P., Straka, Lorrie A.
We use medium-resolution Keck/Echellette Spectrograph and Imager spectroscopy of bright quasars to study cool gas traced by CaII 3934,3969 and NaI 5891,5897 absorption in the interstellar/circumgalactic media of 21 foreground star-forming galaxies at
Externí odkaz:
http://arxiv.org/abs/2208.04973
Autor:
Berg, Michelle A., Lehner, Nicolas, Howk, J. Christopher, O'Meara, John M., Schaye, Joop, Straka, Lorrie A., Cooksey, Kathy L., Tripp, Todd M., Prochaska, J. Xavier, Oppenheimer, Benjamin D., Johnson, Sean D., Muzahid, Sowgat, Bordoloi, Rongmon, Werk, Jessica K., Fox, Andrew J., Katz, Neal, Wendt, Martin, Peeples, Molly S., Ribaudo, Joseph, Tumlinson, Jason
The bimodal absorption system imaging campaign (BASIC) aims to characterize the galaxy environments of a sample of 36 HI-selected partial Lyman limit systems (pLLSs) and Lyman limit systems (LLSs) in 23 QSO fields at $z \lesssim 1$. These pLLSs/LLSs
Externí odkaz:
http://arxiv.org/abs/2204.13229
Autor:
Kulkarni, Varsha P., Bowen, David V., Straka, Lorrie A., York, Donald G., Gupta, Neeraj, Noterdaeme, Pasquier, Srianand, Raghunathan
We report {\it HST} COS spectroscopy of 10 quasars with foreground star-forming galaxies at 0.02$<$$z$$<$ 0.14 within impact parameters of $\sim$1-7 kpc. We detect damped/sub-damped Ly$\alpha$ absorption in 100$\%$ of cases where no higher-redshift L
Externí odkaz:
http://arxiv.org/abs/2112.00870
Autor:
Lundgren, Britt F., Creech, Samantha, Brammer, Gabriel, Kirse, Nathan, Peek, Matthew, Wake, David, York, Donald G., Chisholm, John, Erb, Dawn K., Kulkarni, Varsha P., Straka, Lorrie, Tremonti, Christy, van Dokkum, Pieter
We present the first results from a Hubble Space Telescope WFC3/IR program, which obtained direct imaging and grism observations of galaxies near quasar sightlines with a high frequency of uncorrelated foreground Mg II absorption. These highly effici
Externí odkaz:
http://arxiv.org/abs/2102.10117
Autor:
Peroux, Celine, Zwaan, Martin, Klitsch, Anne, Augustin, Ramona, Hamanowicz, Aleksandra, Rahmani, Hadi, Pettini, Max, Kulkarni, Varsha, Straka, Lorrie, Biggs, Andy, York, Donald, Milliard, Bruno
Galaxy halos appear to be missing a large fraction of their baryons, most probably hiding in the circumgalactic medium (CGM), a diffuse component within the dark matter halo that extends far from the inner regions of the galaxies. A powerful tool to
Externí odkaz:
http://arxiv.org/abs/1901.05217
Autor:
Chen, Hsiao-Wen, Johnson, Sean D., Straka, Lorrie A., Zahedy, Fakhri S., Schaye, Joop, Muzahid, Sowgat, Bouche, Nicolas, Cantalupo, Sebastiano, Marino, Raffaella Anna, Wendt, Martin
This paper presents a study of the galactic environment of a chemically-pristine (<0.6% solar metallicity) Lyman Limit system (LLS) discovered along the sightline toward QSO SDSSJ135726.27+043541.4 (zQSO=1.233) at projected distance d=126 physical kp
Externí odkaz:
http://arxiv.org/abs/1901.04488
Autor:
Johnson, Sean D., Chen, Hsiao-Wen, Straka, Lorrie A., Schaye, Joop, Cantalupo, Sebastiano, Wendt, Martin, Muzahid, Sowgat, Bouché, Nicolas, Herenz, Edmund Christian, Kollatschny, Wolfram, Mulchaey, John S., Marino, Rafaella A., Maseda, Michael V., Wisotzki, Lutz
We report the discovery of six spatially extended (10-100 kpc) line-emitting nebulae in the z=0.57 galaxy group hosting PKS0405-123, one of the most luminous quasars at z<1. The discovery is enabled by the Multi Unit Spectroscopic Explorer (MUSE) and
Externí odkaz:
http://arxiv.org/abs/1811.10615
Autor:
Rahmani, Hadi, Péroux, Céline, Augustin, Ramona, Husemann, Bernd, Kacprzak, Glenn G., Kulkarni, Varsha, Milliard, Bruno, Møller, Palle, Pettini, Max, Straka, Lorrie, Vernet, Joël, York, Donald G.
We present MUSE observations of the field of the quasar Q0152$-$020 whose spectrum shows a Lyman limit system (LLS) at redshift $z_{\rm abs} = 0.38$, with a metallicity Z $\gtrsim 0.06$ Z$_\odot$. The low ionization metal lines associated with the LL
Externí odkaz:
http://arxiv.org/abs/1710.08398
Supernova driven winds are often invoked to remove chemically enriched gas from dwarf galaxies to match their low observed metallicities. In such shallow potential wells, outflows may produce massive amounts of enriched halo gas (circum-galactic medi
Externí odkaz:
http://arxiv.org/abs/1710.06441
Autor:
Marino, Raffaella Anna, Cantalupo, Sebastiano, Lilly, Simon J., Gallego, Sofia G., Straka, Lorrie A., Borisova, Elena, Bacon, Roland, Brinchmann, Jarle, Carollo, C. Marcella, Caruana, Joseph, Conseil, Simon, Contini, Thierry, Diener, Catrina, Finley, Hayley, Inami, Hanae, Leclercq, Floriane, Muzahid, Sowgat, Richard, Johan, Schaye, Joop, Wendt, Martin, Wisotzki, Lutz
Recent theoretical models suggest that the early phase of galaxy formation could involve an epoch when galaxies are gas-rich but inefficient at forming stars: a "dark galaxy" phase. Here, we report the results of our MUSE (Multi Unit Spectroscopic Ex
Externí odkaz:
http://arxiv.org/abs/1709.03522