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Evolution in the measured rest frame ultraviolet spectral slope and ultraviolet to optical flux ratios indicate a rapid evolution in the dust obscuration of galaxies during the first 3 billion years of cosmic time (z>4). This evolution…

Dealing numerically with the turbulent nature and non-linearity of the physical processes involved in the ISM requires the use of sophisticated numerical schemes coupled to HD and MHD mathematical models. SNe are the main drivers of the…

天体物理学 · 物理学 2007-05-23 Miguel A. de Avillez , Dieter Breitschwerdt

In these lectures I review observations of star-forming molecular clouds in our Galaxy and nearby galaxies to develop a physical intuition for understanding star formation in the local and high-redshift Universe. A lot of this material is…

宇宙学与河外天体物理 · 物理学 2012-11-05 Nick Z. Scoville

We use three-dimensional hydrodynamic numerical simulations to study phase transformations occurring in a clumpy interstellar gas exposed to time-dependent volumetric heating. To mimic conditions in the Galactic interstellar medium, we take…

天体物理学 · 物理学 2009-11-07 Alexei G. Kritsuk , Michael L. Norman

FUSE spectra of the four brightest H II regions in M 33 show absorption by interstellar gas in the Galaxy and in M 33. On three lines of sight molecular hydrogen in M 33 is detected. This is the first measurement of diffuse H_2 in…

天体物理学 · 物理学 2009-11-07 Hartmut Bluhm , Klaas S. de Boer , Ole Marggraf , Philipp Richter , Bart P. Wakker

We present a series of adaptive mesh refinement (AMR) hydrodynamic simulations of flat rotation curve galactic gas disks with a detailed treatment of the interstellar medium (ISM) physics of the atomic to molecular phase transition under…

星系天体物理 · 物理学 2018-01-24 Qi Li , Jonathan C. Tan , Duncan Christie , Thomas G. Bisbas , Benjamin Wu

Half of the energy ever emitted by stars and accreting objects comes to us in the FIR waveband and has yet to be properly explored. We propose a powerful Far-InfraRed Interferometer mission, FIRI, to carry out high-resolution imaging…

天体物理学 · 物理学 2009-11-13 Frank Helmich , Rob Ivison

The [CII] 157.74 $\mu$m fine structure transition is one of the brightest and most well-studied emission lines in the far-infrared (FIR), produced in the interstellar medium (ISM) of galaxies. We study its properties in sub-pc resolution…

星系天体物理 · 物理学 2024-03-05 Alon Gurman , Chia-Yu Hu , Amiel Sternberg , Ewine F. van Dishoeck

The role of supersonic turbulence in structuring the interstellar medium (ISM) remains an unsettled question. Here, this problem is investigated using a newexact law of compressible isothermal hydrodynamic turbulence, which involves…

星系天体物理 · 物理学 2023-03-14 Renaud Ferrand , Sébastien Galtier , Fouad Sahraoui , Christoph Federrath

Cosmic dust grains are one of the fundamental ingredients of the interstellar medium (ISM). In spite of their small contribution to the total mass budget, dust grains play a significant role in the physical and chemical evolution of…

星系天体物理 · 物理学 2022-02-09 Angelos Nersesian , Maarten Baes , Suzanne C. Madden

The thermal emission of dust is one of the most important tracers of the interstellar medium: multi-wavelength photometry in the far-infrared (FIR) and submillimeter (submm) can be fitted with a model, providing estimates of the dust mass.…

Pulsar systems are very good experimental laboratories for the fundamental physics in extreme environments which cannot be achieved on ground. For example, the systems are under conditions of high magnetic field strength, large…

高能天体物理现象 · 物理学 2010-06-29 Yukikatsu Terada , Tadayasu Dotani

The Multi-Unit Spectroscopic Explorer (MUSE) is a large integral field unit mounted on the ESO Very Large Telescope. Its spatial (60 arcsecond field) and wavelength (4800-9300A) coverage is well suited to detailed imaging spectroscopy of…

星系天体物理 · 物理学 2020-04-08 J. R. Walsh , A. Monreal-Ibero

While marginal in mass terms, dust grains play an outsized role in both the physics and observation of the interstellar medium (ISM). However, explicit modelling of this ISM constituent remains uncommon in large cosmological simulations. In…

High star-formation rate and active galactic nucleus' emission can significantly transform the interstellar medium. In ultra-luminous infrared galaxies, in which the star-formation rate reaches thousands of solar masses per year, the gas…

The intersection of Astronomy and AI encounters significant challenges related to issues such as noisy backgrounds, lower resolution (LR), and the intricate process of filtering and archiving images from advanced telescopes like the James…

计算机视觉与模式识别 · 计算机科学 2024-05-24 Mohammed Talha Alam , Raza Imam , Mohsen Guizani , Fakhri Karray

Turbulence is ubiquitous in the interstellar medium (ISM) of the Milky Way and other spiral galaxies. The energy source for this turbulence has been much debated with many possible origins proposed. The universality of turbulence, its…

星系天体物理 · 物理学 2015-06-23 D. Falceta-Goncalves , I. Bonnell , G. Kowal , J. Lepine , C. Braga

We present results of an ongoing survey of low surface brightness planetary nebulae (PNe). Using both narrow-band imaging and long slit spectroscopy we have studied 15 new examples for interaction with the interstellar medium (ISM)…

天体物理学 · 物理学 2007-05-23 Florian Kerber , Elise Furlan , Thomas Rauch , Miguel Roth

The use of galaxy clusters as cosmological probes often relies on understanding the properties and evolution of the intracluster medium (ICM). However, the ICM is a complex plasma, regularly stirred by mergers and feedback, with…

星系天体物理 · 物理学 2022-06-15 Jake S. Bennett , Debora Sijacki

The interstellar medium (ISM) is a turbulent, highly structured multi-phase medium. State-of-the-art cosmological simulations of the formation of galactic discs usually lack the resolution to accurately resolve those multi-phase structures.…

星系天体物理 · 物理学 2022-04-13 Tobias Buck , Christoph Pfrommer , Philipp Girichidis , Bogdan Corobean