156 results on '"Schreiber, N. M. Förster"'
Number of results to display per page
Search Results
152. THE SINS/zC-SINF SURVEY OF z ∼ 2 GALAXY KINEMATICS: EVIDENCE FOR POWERFUL ACTIVE GALACTIC NUCLEUS-DRIVEN NUCLEAR OUTFLOWS IN MASSIVE STAR-FORMING GALAXIES.
- Author
-
Schreiber, N. M. Förster, Genzel, R., Newman, S. F., Kurk, J. D., Lutz, D., Tacconi, L. J., Wuyts, S., Bandara, K., Burkert, A., Buschkamp, P., Carollo, C. M., Cresci, G., Daddi, E., Davies, R., Eisenhauer, F., Hicks, E. K. S., Lang, P., Lilly, S. J., Mainieri, V., and Mancini, C.
- Subjects
- *
GALAXIES , *ACTIVE galactic nuclei , *GALACTIC evolution , *STELLAR mass , *ASTROPHYSICS research - Abstract
We report the detection of ubiquitous powerful nuclear outflows in massive (⩾1011M☼) z ∼ 2 star-forming galaxies (SFGs), which are plausibly driven by an active galactic nucleus (AGN). The sample consists of the eight most massive SFGs from our SINS/zC-SINF survey of galaxy kinematics with the imaging spectrometer SINFONI, six of which have sensitive high-resolution adaptive optics-assisted observations. All of the objects are disks hosting a significant stellar bulge. The spectra in their central regions exhibit a broad component in Hα and forbidden [N II] and [S II] line emission, with typical velocity FWHM ∼ 1500 km s–1, [N II]/Hα ratio ≈ 0.6, and intrinsic extent of 2-3 kpc. These properties are consistent with warm ionized gas outflows associated with Type 2 AGN, the presence of which is confirmed via independent diagnostics in half the galaxies. The data imply a median ionized gas mass outflow rate of ∼60 M☼ yr–1 and mass loading of ∼3. At larger radii, a weaker broad component is detected but with lower FWHM ∼485 km s–1 and [N II]/Hα ≈ 0.35, characteristic for star formation-driven outflows as found in the lower-mass SINS/zC-SINF galaxies. The high inferred mass outflow rates and frequent occurrence suggest that the nuclear outflows efficiently expel gas out of the centers of the galaxies with high duty cycles and may thus contribute to the process of star formation quenching in massive galaxies. Larger samples at high masses will be crucial in confirming the importance and energetics of the nuclear outflow phenomenon and its connection to AGN activity and bulge growth. [ABSTRACT FROM AUTHOR]
- Published
- 2014
- Full Text
- View/download PDF
153. De re metallica: the cosmic chemical evolution of galaxies.
- Author
-
Maiolino, R. and Mannucci, F.
- Subjects
GALACTIC evolution ,HEAVY elements ,GALAXY formation ,GALAXIES ,CHEMICAL elements - Abstract
The evolution of the content of heavy elements in galaxies, the relative chemical abundances, their spatial distribution, and how these scale with various galactic properties, provide unique information on the galactic evolutionary processes across the cosmic epochs. In recent years major progress has been made in constraining the chemical evolution of galaxies and inferring key information relevant to our understanding of the main mechanisms involved in galaxy evolution. In this review we provide an overview of these various areas. After an overview of the methods used to constrain the chemical enrichment in galaxies and their environment, we discuss the observed scaling relations between metallicity and galaxy properties, the observed relative chemical abundances, how the chemical elements are distributed within galaxies, and how these properties evolve across the cosmic epochs. We discuss how the various observational findings compare with the predictions from theoretical models and numerical cosmological simulations. Finally, we briefly discuss the open problems and the prospects for major progress in this field in the nearby future. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
154. Model of the Galaxy with Hot Dark Matter.
- Author
-
Khokhlov, Dmitri L.
- Subjects
DARK matter ,BARYONS ,GALAXY formation ,KINEMATICS ,INTERSTELLAR medium - Abstract
The model of the galaxy is considered as a structure of the baryonic matter embedded into the hot dark matter. The dark matter is supposed to come into being from the decaying matter after the epoch of structure formation. The galaxy is divided into two regions. In the inner region, the baryonic matter predominates over the hot dark matter while in the outer region, the hot dark matter predominates over the baryonic matter. The motion of the test particle is bounded in the inner region (elliptic orbit) and unbounded in the outer region (parabolic orbit). Observational constraints on the proposed model are considered from the rotation curves of the galaxies: Milky Way, M33, NGC 2366 and IC 2574. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
155. The SINS/zC-SINF Survey of z ∼ 2 Galaxy Kinematics: SINFONI Adaptive Optics–assisted Data and Kiloparsec-scale Emission-line Properties
- Author
-
Philipp Lang, Thorsten Naab, Jaron Kurk, Giovanni Cresci, Richard Davies, E. Daddi, C. Mancini, Alvio Renzini, H. J. McCracken, V. Mainieri, G. Zamorani, Stijn Wuyts, Andrea Cimatti, Pascal Oesch, Linda J. Tacconi, K. Shapiro Griffin, N. Bouché, Reinhard Genzel, S. J. Lilly, Lucia Pozzetti, Shy Genel, Sandro Tacchella, Alice E. Shapley, Amiel Sternberg, Y. Peng, C. M. Carollo, Marco Scodeggio, Erin K. S. Hicks, M. Mignoli, Andreas Burkert, Dieter Lutz, N. M. Förster Schreiber, Max Planck Institute for Extraterrestrial Physics (MPE), Max-Planck-Gesellschaft, Max-Planck-Institut für Extraterrestrische Physik (MPE), Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), INAF - Osservatorio Astrofisico di Arcetri (OAA), Istituto Nazionale di Astrofisica (INAF), AUTRES, Hunan Normal University (HNU), Universitätssternwarte der Ludwig-Maximiliansuniversität, Ludwig-Maximiliansuniversität, Astrophysique Interprétation Modélisation (AIM (UMR7158 / UMR_E_9005 / UM_112)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), University of St Andrews [Scotland], European Southern Observatory (ESO), Institut d'Astrophysique de Paris (IAP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Istituto di Astrofisica Spaziale e Fisica cosmica - Bologna (IASF-Bo), INAF - Osservatorio Astronomico di Capodimonte (OAC), University of Bologna/Università di Bologna, Department of Physics and Astronomy [Irvine], University of California [Irvine] (UC Irvine), University of California (UC)-University of California (UC), Institut of Physics - Riga, Latvian Academy of Sciences, ITA, USA, FRA, DEU, CYP, ISR, CHN, CHE, Schreiber, N. M. Förster, Renzini, A., Mancini, C., Genzel, R., Bouché, N., Cresci, G., Hicks, E.K.S., Lilly, S.J., Peng, Y., Burkert, A., Carollo, C.M., Cimatti, A., Daddi, E., Davies, R.I., Genel, S., Kurk, J.D., Lang, P., Lutz, D., Mainieri, V., McCracken, H.J., Mignoli, M., Naab, T., Oesch, P., Pozzetti, L., Scodeggio, M., Griffin, K. Shapiro, Shapley, A.E., Sternberg, A., Tacchella, S., Tacconi, L.J., Wuyts, S., Zamorani, G., Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Osservatorio Astronomico (INAF), Hunan Normal University, Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7), University of St Andrews, University of Bologna, University of California [Irvine] (UCI), University of California-University of California, Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)
- Subjects
[SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] ,Population ,FOS: Physical sciences ,Flux ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astrophysics ,01 natural sciences ,galaxies: high-redshift ,kinematics and dynamics [galaxies] ,0103 physical sciences ,Astrophysics::Solar and Stellar Astrophysics ,Emission spectrum ,education ,010303 astronomy & astrophysics ,ComputingMilieux_MISCELLANEOUS ,Astrophysics::Galaxy Astrophysics ,Physics ,education.field_of_study ,Very Large Telescope ,ISM [galaxies] ,010308 nuclear & particles physics ,Astronomy and Astrophysics ,Astronomy and Astrophysic ,Astrophysics - Astrophysics of Galaxies ,Redshift ,Galaxy ,Space and Planetary Science ,Astrophysics of Galaxies (astro-ph.GA) ,structure [galaxies] ,galaxies: structure ,galaxies: kinematics and dynamic ,H-alpha ,Astrophysics::Earth and Planetary Astrophysics ,galaxies: ISM ,high-redshift [galaxies] ,Data reduction - Abstract
We present the "SINS/zC-SINF AO survey" of 35 star-forming galaxies, the largest sample with deep adaptive optics-assisted (AO) near-infrared integral field spectroscopy at z~2. The observations, taken with SINFONI at the Very Large Telescope, resolve the Ha and [NII] line emission and kinematics on scales of ~1.5 kpc. In stellar mass, star formation rate, rest-optical colors and size, the AO sample is representative of its parent seeing-limited sample and probes the massive (M* ~ 2x10^9 - 3x10^11 Msun), actively star-forming (SFR ~ 10-600 Msun/yr) part of the z~2 galaxy population over a wide range in colors ((U-V)_rest ~ 0.15-1.5 mag) and half-light radii (R_e,H ~ 1-8.5 kpc). The sample overlaps largely with the "main sequence" of star-forming galaxies in the same redshift range to a similar K_AB = 23 magnitude limit; it has ~0.3 dex higher median specific SFR, ~0.1 mag bluer median (U-V)_rest color, and ~10% larger median rest-optical size. We describe the observations, data reduction, and extraction of basic flux and kinematic properties. With typically 3-4 times higher resolution and 4-5 times longer integrations (up to 23hr) than the seeing-limited datasets of the same objects, the AO data reveal much more detail in morphology and kinematics. The now complete AO observations confirm the majority of kinematically-classified disks and the typically elevated disk velocity dispersions previously reported based on subsets of the data. We derive typically flat or slightly negative radial [NII]/Ha gradients, with no significant trend with global galaxy properties, kinematic nature, or the presence of an AGN. Azimuthal variations in [NII]/Ha are seen in several sources and are associated with ionized gas outflows, and possible more metal-poor star-forming clumps or small companions. [Abridged], Comment: Submitted to the Astrophysical Journal Supplement Series. 64 pages, 36 figures. The reduced data sets will be made available once the paper is accepted for publication. A version with full resolution Figures is available at http://www.mpe.mpg.de/~forster/FS18_AOsurvey_ApJSsubm.html
- Published
- 2018
156. The SINS Survey: Modeling the Dynamics of z ~ 2 Galaxies and the High-z Tully-Fisher Relation
- Author
-
Emanuele Daddi, S. L. Lilly, Shy Genel, Karina Caputi, Erin K. S. Hicks, Jaron Kurk, P. Buschkamp, Thorsten Naab, Ortwin Gerhard, Andreas Burkert, Giovanni Cresci, N. M. Foerster Schreiber, Dieter Lutz, Amiel Sternberg, Charles C. Steidel, Reinhard Genzel, Ric Davies, Kristen L. Shapiro, Alice E. Shapley, Frank Eisenhauer, Nicolas Bouché, Linda J. Tacconi, Dawn K. Erb, Alvio Renzini, Jesper Sommer-Larsen, Andrea Cimatti, Cresci G., Hicks E. K. S., Genzel R., Schreiber N. M. Förster, Davies R., Bouché N., Buschkamp P., Genel S., Shapiro K., Tacconi L., Sommer-Larsen J., Burkert A., Eisenhauer F., Gerhard O., Lutz D., Naab T., Sternberg A., Cimatti A., Daddi E., Erb D. K., Kurk J., Lilly S. L., Renzini A., Shapley A., Steidel C. C., Caputi K., and Astronomy
- Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,Stellar mass ,H-ALPHA ,INTERMEDIATE REDSHIFT ,FOS: Physical sciences ,Zero-point energy ,Angular velocity ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astrophysics ,Tully–Fisher relation ,HIGH-REDSHIFT GALAXIES ,infrared: galaxies ,galaxies: high-redshift ,STAR-FORMING GALAXIES ,STELLAR MASS DENSITY ,INTEGRAL FIELD SPECTROSCOPY ,Astrophysics::Galaxy Astrophysics ,galaxies: kinematics and dynamics ,Physics ,ADAPTIVE OPTICS ,Astronomy and Astrophysics ,DISK GALAXIES ,Galaxy ,Redshift ,Accretion (astrophysics) ,LYMAN-BREAK GALAXIES ,Space and Planetary Science ,ROTATION CURVES ,Astrophysics::Earth and Planetary Astrophysics ,Halo ,galaxies: evolution ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
We present the modeling of SINFONI integral field dynamics of 18 star forming galaxies at z ~ 2 from Halpha line emission. The galaxies are selected from the larger sample of the SINS survey, based on the prominence of ordered rotational motions with respect to more complex merger induced dynamics. The quality of the data allows us to carefully select systems with kinematics dominated by rotation, and to model the gas dynamics across the whole galaxy using suitable exponential disk models. We obtain a good correlation between the dynamical mass and the stellar mass, finding that large gas fractions Mgas~M*) are required to explain the difference between the two quantities. We use the derived stellar mass and maximum rotational velocity Vmax from the modeling to construct for the first time the stellar mass Tully-Fisher relation at z ~ 2.2. The relation obtained shows a slope similar to what is observed at lower redshift, but we detect an evolution of the zero point. We find that at z ~ 2.2 there is an offset in log(M*) for a given rotational velocity of 0.41+-0.11 with respect to the local Universe. This result is consistent with the predictions of the latest N-body/hydrodynamical simulations of disk formation and evolution, which invoke gas accretion onto the forming disk in filaments and cooling flows. This scenario is in agreement with other dynamical evidence from SINS, where gas accretion from the halo is required to reproduce the observed properties of a large fraction of the z ~ 2 galaxies., Comment: 10 pages, 6 figures, submitted to ApJ
- Published
- 2009
Catalog
Books, media, physical & digital resources
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.