Search

Your search keyword '"Bouché, N."' showing total 7 results
Start Over Author "Bouché, N." Journal nature
7 results on '"Bouché, N."'

3. Author Correction: Nearly all the sky is covered by Lyman-α emission around high-redshift galaxies

Author

Wisotzki, L., primary, Bacon, R., additional, Brinchmann, J., additional, Cantalupo, S., additional, Richter, P., additional, Schaye, J., additional, Schmidt, K. B., additional, Urrutia, T., additional, Weilbacher, P. M., additional, Akhlaghi, M., additional, Bouché, N., additional, Contini, T., additional, Guiderdoni, B., additional, Herenz, E. C., additional, Inami, H., additional, Kerutt, J., additional, Leclercq, F., additional, Marino, R. A., additional, Maseda, M., additional, Monreal-Ibero, A., additional, Nanayakkara, T., additional, Richard, J., additional, Saust, R., additional, Steinmetz, M., additional, and Wendt, M., additional

Published
2018
Full Text
View/download PDF

4. Nearly all the sky is covered by Lyman-α emission around high-redshift galaxies

Author

Wisotzki, L., primary, Bacon, R., additional, Brinchmann, J., additional, Cantalupo, S., additional, Richter, P., additional, Schaye, J., additional, Schmidt, K. B., additional, Urrutia, T., additional, Weilbacher, P. M., additional, Akhlaghi, M., additional, Bouché, N., additional, Contini, T., additional, Guiderdoni, B., additional, Herenz, E. C., additional, Inami, H., additional, Kerutt, J., additional, Leclercq, F., additional, Marino, R. A., additional, Maseda, M., additional, Monreal-Ibero, A., additional, Nanayakkara, T., additional, Richard, J., additional, Saust, R., additional, Steinmetz, M., additional, and Wendt, M., additional

Published
2018
Full Text
View/download PDF

5. Nearly all the sky is covered by Lyman-a emission around high-redshift galaxies

Author

Wisotzki, L., Bacon, R., Brinchmann, J., Cantalupo, S., Richter, P., Schaye, J., Schmidt, K. B., Urrutia, T., Weilbacher, P. M., Akhlaghi, M., Bouché, N., Contini, T., Guiderdoni, B., Herenz, E. C., Inami, H., Kerutt, J., Leclercq, F., Marino, R. A., Maseda, M., Monreal-Ibero, A., Nanayakkara, T., Richard, J., Saust, R., Steinmetz, M., and Wendt, M.

Abstract

Galaxies are surrounded by large reservoirs of gas, mostly hydrogen, that are fed by inflows from the intergalactic medium and by outflows from galactic winds. Absorption-line measurements along the lines of sight to bright and rare background quasars indicate that this circumgalactic medium extends far beyond the starlight seen in galaxies, but very little is known about its spatial distribution. The Lyman-a transition of atomic hydrogen at a wavelength of 121.6 nanometres is an important tracer of warm (about 104kelvin) gas in and around galaxies, especially at cosmological redshifts greater than about 1.6 at which the spectral line becomes observable from the ground. Tracing cosmic hydrogen through its Lyman-a emission has been a long-standing goal of observational astrophysics1–3, but the extremely low surface brightness of the spatially extended emission is a formidable obstacle. A new window into circumgalactic environments was recently opened by the discovery of ubiquitous extended Lyman-a emission from hydrogen around high-redshift galaxies4,5. Such measurements were previously limited to especially favourable systems6–8or to the use of massive statistical averaging9,10because of the faintness of this emission. Here we report observations of low-surface-brightness Lyman-a emission surrounding faint galaxies at redshifts between 3 and 6. We find that the projected sky coverage approaches 100 per cent. The corresponding rate of incidence (the mean number of Lyman-a emitters penetrated by any arbitrary line of sight) is well above unity and similar to the incidence rate of high-column-density absorbers frequently detected in the spectra of distant quasars11–14. This similarity suggests that most circumgalactic atomic hydrogen at these redshifts has now been detected in emission.

Published
2018
Full Text
View/download PDF

6. Author Correction: Nearly all the sky is covered by Lyman-a emission around high-redshift galaxies

Author

Wisotzki, L., Bacon, R., Brinchmann, J., Cantalupo, S., Richter, P., Schaye, J., Schmidt, K. B., Urrutia, T., Weilbacher, P. M., Akhlaghi, M., Bouché, N., Contini, T., Guiderdoni, B., Herenz, E. C., Inami, H., Kerutt, J., Leclercq, F., Marino, R. A., Maseda, M., Monreal-Ibero, A., Nanayakkara, T., Richard, J., Saust, R., Steinmetz, M., and Wendt, M.

Abstract

Change history: In this Letter, author M. Akhlaghi should be associated with affiliation (2) rather than (3). This error has been corrected online.

Published
2018
Full Text
View/download PDF

7. The rapid formation of a large rotating disk galaxy three billion years after the Big Bang

Author

Emanuele Daddi, N. M. Förster Schreiber, Ric Davies, Aprajita Verma, Linda J. Tacconi, Dieter Lutz, Reinhard Genzel, Nobuo Arimoto, Xu Kong, M. Mignoli, Roberto Abuter, Matthew D. Lehnert, Nicole P. H. Nesvadba, Alvio Renzini, Andrea Cimatti, Amiel Sternberg, Kristen L. Shapiro, Frank Eisenhauer, Nicolas Bouché, Genzel R., Tacconi L. J., Eisenhauer F., Förster Schreiber N. M., Cimatti A., Daddi E., Bouché N., Davies R., Lehnert M. D., Lutz D., Nesvadba N., Verma A., Abuter R., Shapiro K., Sternberg A., Renzini A., Kong X., Arimoto N., and Mignoli M.

Subjects
Physics, Multidisciplinary, Astrophysics (astro-ph), Astronomy, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Galaxy merger, Galaxy, Bulge, Galaxy formation and evolution, Elliptical galaxy, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics, Interacting galaxy, Lenticular galaxy, Astrophysics::Galaxy Astrophysics, Dwarf galaxy
Abstract

[Abridged] Over the past two decades observations and theoretical simulations have established a global frame-work of galaxy formation and evolution in the young Universe. Galaxies formed as baryonic gas cooled at the centres of collapsing dark matter halos. Mergers of halos led to the build up of galaxy mass. A major step forward in understanding these issues requires well resolved physical information on individual galaxies at high redshift. Here we report adaptive optics, spectroscopic observations of a representative luminous star forming galaxy when the Universe was only twenty percent of its age. The superior angular resolution of these data reveals the physical and dynamical properties of a high redshift galaxy in unprecedented detail. A large and massive rotating proto-disk is channelling gas towards a growing central stellar bulge hosting an accreting massive black hole., Comment: Narure, accepted (Released Aug 17th)

Published
2006

Catalog

Books, media, physical & digital resources
See catalog results