ORCID Profile
0000-0001-8177-1023
Current Organisation
NASA Jet Propulsion Laboratory
Does something not look right? The information on this page has been harvested from data sources that may not be up to date. We continue to work with information providers to improve coverage and quality. To report an issue, use the Feedback Form.
Publisher: American Astronomical Society
Date: 12-2007
DOI: 10.1086/523853
Publisher: Springer Science and Business Media LLC
Date: 08-2015
DOI: 10.1038/NATURE14616
Abstract: The specifics of how galaxies form from, and are fuelled by, gas from the intergalactic medium remain uncertain. Hydrodynamic simulations suggest that 'cold accretion flows'--relatively cool (temperatures of the order of 10(4) kelvin), unshocked gas streaming along filaments of the cosmic web into dark-matter halos--are important. These flows are thought to deposit gas and angular momentum into the circumgalactic medium, creating disk- or ring-like structures that eventually coalesce into galaxies that form at filamentary intersections. Recently, a large and luminous filament, consistent with such a cold accretion flow, was discovered near the quasi-stellar object QSO UM287 at redshift 2.279 using narrow-band imaging. Unfortunately, imaging is not sufficient to constrain the physical characteristics of the filament, to determine its kinematics, to explain how it is linked to nearby sources, or to account for its unusual brightness, more than a factor of ten above what is expected for a filament. Here we report a two-dimensional spectroscopic investigation of the emitting structure. We find that the brightest emission region is an extended rotating hydrogen disk with a velocity profile that is characteristic of gas in a dark-matter halo with a mass of 10(13) solar masses. This giant protogalactic disk appears to be connected to a quiescent filament that may extend beyond the virial radius of the halo. The geometry is strongly suggestive of a cold accretion flow.
Publisher: Springer Science and Business Media LLC
Date: 18-05-2022
DOI: 10.1038/S41586-022-04616-1
Abstract: Reservoirs of dense atomic gas (primarily hydrogen) contain approximately 90 per cent of the neutral gas at a redshift of 3, and contribute to between 2 and 3 per cent of the total baryons in the Universe
Publisher: American Astronomical Society
Date: 04-09-2018
Publisher: SPIE
Date: 16-07-2010
DOI: 10.1117/12.856644
Publisher: American Astronomical Society
Date: 12-2007
DOI: 10.1086/516642
Publisher: American Astronomical Society
Date: 06-2018
Publisher: American Astronomical Society
Date: 17-01-2005
DOI: 10.1086/422811
Publisher: American Astronomical Society
Date: 24-04-2014
Publisher: American Astronomical Society
Date: 17-01-2005
DOI: 10.1086/425251
Publisher: American Astronomical Society
Date: 18-03-2005
DOI: 10.1086/429993
Publisher: American Astronomical Society
Date: 18-03-2005
DOI: 10.1086/429377
Publisher: SPIE
Date: 24-09-2012
DOI: 10.1117/12.924729
Publisher: Oxford University Press (OUP)
Date: 03-08-2018
Publisher: American Astronomical Society
Date: 02-06-2016
Publisher: American Astronomical Society
Date: 26-06-2018
Publisher: American Astronomical Society
Date: 12-2007
DOI: 10.1086/522088
Publisher: American Astronomical Society
Date: 24-04-2014
Location: United States of America
No related grants have been discovered for Patrick Morrissey.