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To investigate the origins of the warm absorbers in active galactic nuclei (AGNs), we study the ionization-state structure of the radiation-driven fountain model in a low-mass AGN (Wada et al. 2016) and calculate the predicted X-ray…

高能天体物理现象 · 物理学 2022-02-02 Shoji Ogawa , Yoshihiro Ueda , Keiichi Wada , Misaki Mizumoto

The INT Photometric Halpha Survey of the Northern Galactic Plane (IPHAS) is a 1800 square degrees CCD survey of the northern Milky Way spanning the latitude range -5 < b < +5 (degrees) and reaching down to r' ~ 20 (10-sigma). It may…

天体物理学 · 物理学 2009-11-13 Janet E. Drew , R. Greimel , M. J. Irwin , IPHAS collaboration

Context. The APEX Telescope Large Area Survey of the Galaxy (ATLASGAL) is the first systematic survey of the inner Galactic plane in the sub-millimetre. The observations were carried out with the Large APEX Bolometer Camera (LABOCA), an…

In this work, we combine a stochastic model reduction with a particle filter augmented with tempering and jittering, and apply the combined algorithm to a damped and forced incompressible 2D Euler dynamics defined on a simply connected…

应用统计 · 统计学 2020-08-25 Colin Cotter , Dan Crisan , Darryl D. Holm , Wei Pan , Igor Shevchenko

Outflows play a major role in the evolution of galaxies. However, we do not have yet a complete picture of their properties (extension, geometry, orientation and clumpiness). For low-luminosity Active Galactic Nuclei (AGNs), in particular,…

星系天体物理 · 物理学 2022-04-27 Laura Hermosa Muñoz , Isabel Márquez , Sara Cazzoli , Josefa Masegosa , Beatriz Agís-González

Observationally, the fraction of blue satellite galaxies decreases steeply with host halo mass, and their radial distribution around central galaxies is significantly shallower in massive (M_* >10e11M_sun) than in Milky Way like systems.…

Using a spectral decomposition technique (Soto & Martin 2012, hereafter Paper I), we investigate the physical origin of the high-velocity emission line gas in a sample of 39 gas-rich, ultraluminous infrared galaxy (ULIRG) mergers. Regions…

宇宙学与河外天体物理 · 物理学 2015-06-04 Kurt T. Soto , C. L. Martin , M. K. M. Prescott , L. Armus

Detection of point sources in images is a fundamental operation in astrophysics, and is crucial for constraining population models of the underlying point sources or characterizing the background emission. Standard techniques fall short in…

天体物理仪器与方法 · 物理学 2018-02-28 Tansu Daylan , Stephen K. N. Portillo , Douglas P. Finkbeiner

Nearly 1/3 of the sources listed in the Third Fermi Large Area Telescope (LAT) catalog (3FGL) remain unassociated. It is possible that predicted and even unanticipated gamma-ray source classes are present in these data waiting to be…

高能天体物理现象 · 物理学 2016-07-06 N. Mirabal , E. Charles , E. C. Ferrara , P. L. Gonthier , A. K. Harding , M. A. Sánchez-Conde , D. J. Thompson

We present an update to the framework called SImulator of GAlaxy Millimeter/submillimeter Emission (S\'IGAME). S\'IGAME derives line emission in the far-infrared (FIR) for galaxies in particle-based cosmological hydrodynamics simulations by…

We present a new reconstruction of the distribution of atomic hydrogen in the inner Galaxy that is based on explicit radiation-transport modelling of line and continuum emission and a gas-flow model in the barred Galaxy that provides…

高能天体物理现象 · 物理学 2022-05-11 Martin Pohl , Oscar Macias , Phaedra Coleman , Chris Gordon

We report the detection at 850um of the central source in SSA22-LAB1, the archetypal Lyman-alpha Blob (LAB), a 100kpc-scale radio-quiet emission-line nebula at z=3.1. The flux density of the source, $S_{850}=4.6\pm1.1$mJy implies the…

We present a new database of absorption and emission-line measurements based on the entire spectral atlas from the Sloan Digital Sky Survey (SDSS) 7th data release of galaxies within a redshift of 0.2. Our work makes use of the publicly…

宇宙学与河外天体物理 · 物理学 2015-05-28 Kyuseok Oh , Marc Sarzi , Kevin Schawinski , Sukyoung K. Yi

The Fermi Large Area Telescope (LAT) Collaboration has recently released a catalog of 360 sources detected above 50 GeV (2FHL). This catalog was obtained using 80 months of data re-processed with Pass 8, the newest event-level analysis,…

宇宙学与河外天体物理 · 物理学 2016-04-20 LAT Collaboration

Observations of quasar absorption line systems reveal that the z=3 intergalactic medium (IGM) is polluted by heavy elements down to HI optical depths tau_HI<<10. What is not yet clear, however, is what fraction of the volume needs to be…

宇宙学与河外天体物理 · 物理学 2015-05-20 C. M. Booth , Joop Schaye , J. D. Delgado , Claudio Dalla Vecchia

Three bright molecular line sources in G333 have recently been shown to exhibit signatures of infall. We describe a molecular line radiative transfer modelling process which is required to extract the infall signature from Mopra and Nanten2…

星系天体物理 · 物理学 2016-04-20 B. Wiles , N. Lo , M. P. Redman , M. R. Cunningham , P. A. Jones , M. G. Burton , L. Bronfman

Galactic interstellar emission contributes substantially to Fermi LAT observations in the Galactic plane, where the majority of Supernova Remnants (SNRs) are located. We have developed a method to explore some systematic effects on SNRs'…

高能天体物理现象 · 物理学 2019-08-13 F. de Palma , T. J. Brandt , G. Johannesson , L. Tibaldo

Recent magneto-hydrodynamic simulations of the star-forming interstellar medium (ISM) with parsec scale resolution indicate that relativistic cosmic rays support the launching of galactic outflows on scales of a few kpc. If these…

星系天体物理 · 物理学 2018-07-23 Max Gronke , Philipp Girichidis , Thorsten Naab , Stefanie Walch

We report on the determination of electron densities, and their impact on the outflow masses and rates, measured in the central few hundred parsecs of 11 local luminous active galaxies. We show that the peak of the integrated line emission…

This paper describes the characterization of the GALANTE photometric system, a seven intermediate- and narrow-band filter system with a wavelength coverage from 3000 $\r{A}$ to 9000 $\r{A}$ . We describe the photometric system presenting…