Zobrazeno 1 - 10
of 277
pro vyhledávání: '"Wakker, Bart"'
Autor:
Sameer, Charlton, Jane C., Wakker, Bart P., Kacprzak, Glenn G., Nielsen, Nikole M., Churchill, Christopher W., Richter, Philipp, Muzahid, Sowgat, Ho, Stephanie H., Nateghi, Hasti, Rosenwasser, Benjamin, Narayanan, Anand, Ganguly, Rajib
The pervasive presence of warm gas in galaxy halos suggests that the circumgalactic medium (CGM) is multiphase in its ionization structure and complex in its kinematics. Some recent state-of-the-art cosmological galaxy simulations predict an azimutha
Externí odkaz:
http://arxiv.org/abs/2403.05617
Autor:
Ashley, Trisha, Fox, Andrew J., Lockman, Felix J., Wakker, Bart P., Richter, Philipp, French, David M., Moss, Vanessa A., McClure-Griffiths, Naomi M.
High-velocity clouds (HVCs) are multi-phase gas structures whose velocities (|v_LSR|>100 km/s) are too high to be explained by Galactic disk rotation. While large HVCs are well characterized, compact and small HVCs (with HI angular sizes of a few deg
Externí odkaz:
http://arxiv.org/abs/2311.09377
Autor:
Cashman, Frances H., Fox, Andrew J., Wakker, Bart P., Ashley, Trisha, Massa, Derck, Jenkins, Edward B., Krishnarao, Dhanesh, Lockman, Felix J., Benjamin, Robert A., Bordoloi, Rongmon, Kim, Tae-Sun
We characterize the chemical and physical conditions in an outflowing high-velocity cloud in the inner Galaxy. We report a super-solar metallicity of [O/H] = $+0.36\pm0.12$ for the high-velocity cloud at $v_\mathrm{LSR}$ = 125.6 km s$^{-1}$ toward th
Externí odkaz:
http://arxiv.org/abs/2210.11583
Autor:
Krishnarao, Dhanesh, Fox, Andrew J., D'Onghia, Elena, Wakker, Bart P., Cashman, Frances H., Howk, J. Christopher, Lucchini, Scott, French, David M., Lehner, Nicolas
Publikováno v:
Nature 609, pages 915-918 (2022)
The Large and Small Magellanic Clouds (LMC/SMC) are the closest major satellite galaxies of the Milky Way. They are likely on their first passage on an infalling orbit towards our Galaxy (Besla et al. 2007) and trace the ongoing dynamics of the Local
Externí odkaz:
http://arxiv.org/abs/2209.15017
Autor:
Ashley, Trisha, Fox, Andrew J., Cashman, Frances H., Lockman, Felix J., Bordoloi, Rongmon, Jenkins, Edward B., Wakker, Bart P., Karim, Tanveer
Publikováno v:
Nature Astronomy (2022)
The Galactic Center is surrounded by two giant plasma lobes known as the Fermi Bubbles, extending ~10 kpc both above and below the Galactic plane. Spectroscopic observations of Fermi Bubble directions at radio, ultraviolet, and optical wavelengths ha
Externí odkaz:
http://arxiv.org/abs/2207.08838
Autor:
Sameer, Charlton, Jane, Kacprzak, Glenn, Narayanan, Anand, Sankar, Sriram, Richter, Philipp, Wakker, Bart, Nielsen, Nikole, Churchill, Christopher
We present an absorption line study of the physical and chemical properties of the Leo HI Ring and the Leo I Group as traced by 11 quasar sightlines spread over a 600 kpc X 800 kpc region. Using HST/COS G130/G160 archival observations as constraints,
Externí odkaz:
http://arxiv.org/abs/2201.02631
Autor:
Cashman, Frances H., Fox, Andrew J., Savage, Blair D., Wakker, Bart P., Krishnarao, Dhanesh, Benjamin, Robert A., Richter, Philipp, Ashley, Trisha, Jenkins, Edward B., Lockman, Felix J., Bordoloi, Rongmon, Kim, Tae-Sun
We report the first direct detection of molecular hydrogen associated with the Galactic nuclear wind. The Far-Ultraviolet Spectroscopic Explorer spectrum of LS 4825, a B1 Ib-II star at $l,b$ = 1.67$^{\circ}$,$-$6.63$^{\circ}$ lying $d$ = 9.9$^{+1.4}_
Externí odkaz:
http://arxiv.org/abs/2112.03335
Autor:
Bolton, James S., Gaikwad, Prakash, Haehnelt, Martin G., Kim, Tae-Sun, Nasir, Fahad, Puchwein, Ewald, Viel, Matteo, Wakker, Bart P.
We examine the column density distribution function (CDDF) and Doppler parameter distribution from hydrodynamical simulations and Cosmic Origins Spectrograph (COS) observations of the Lyman-alpha forest at redshift $0\leq z\leq 0.2$. Allowing for a f
Externí odkaz:
http://arxiv.org/abs/2111.09600
Autor:
French, David M., Fox, Andrew J., Wakker, Bart P., Norman, Colin, Lehner, Nicolas, Howk, J. Christopher, Savage, Blair D., Richter, Philipp, O'Meara, John, Borthakur, Sanchayeeta, Heckman, Timoth
We present a census of neutral gas in the Milky Way disk and halo down to limiting column densities of $N$(HI)$\sim10^{14}$ cm$^{-2}$ using measurements of HI Lyman-series absorption from the Far Ultraviolet Spectroscopic Explorer (FUSE). Our results
Externí odkaz:
http://arxiv.org/abs/2108.07419
Autor:
Norris, Jackson M., Muzahid, Sowgat, Charlton, Jane C., Kacprzak, Glenn G., Wakker, Bart P., Churchill, Christopher W.
We have obtained new observations of the absorption system at $z_\mathrm{abs}=0.48$ toward QSO Q0454-220, which we use to constrain its chemical and physical conditions. The system features metal-enriched gas and previously unknown low-metallicity ga
Externí odkaz:
http://arxiv.org/abs/2106.12927