Detectability of [CII] 158 micron emission from high-redshift galaxies: predictions for ALMA and SPICA

Abstract

We discuss the detectability of high-redshift galaxies via [CII] 158 micron line emission by coupling an analytic model with cosmological Smoothed Particle Hydrodynamics (SPH) simulations that are based on the concordance Lambda cold dark matter (CDM) model. Our analytic model describes a multiphase interstellar medium irradiated by the far ultra-violet radiation from local star-forming regions, and it calculates thermal and ionization equilibrium between cooling and heating. The model allows us to predict the mass fraction of a cold neutral medium (CNM) embedded in a warm neutral medium (WNM). Our cosmological SPH simulations include a treatment of radiative cooling/heating, star formation, and feedback effects from supernovae and galactic winds. Using our method, we make predictions for the [CII] luminosity from high-redshift galaxies which can be directly compared with upcoming observations by the Atacama Large Millimeter Array (ALMA) and the Space Infrared Telescope for Cosmology and Astrophysics (SPICA). We find that the number density of high-redshift galaxies detectable by ALMA and SPICA via [CII] emission depends significantly on the amount of neutral gas which is highly uncertain. Our calculations suggest that, in a CDM universe, most [CII] sources at z=3 are faint objects with \Snu < 0.01 mJy. Lyman-break galaxies (LBGs) brighter than R_AB=23.5 mag are expected to have flux densities \Snu = 1-3 mJy depending on the strength of galactic wind feedback. The recommended observing strategy for ALMA and SPICA is to aim at very bright LBGs or star-forming DRG/BzK galaxies.

39 pages, 13 figures, accepted to ApJ. Matched to the accepted version

References in corpus (19)

• The cosmological simulation code GADGET-2
• Energy input from quasars regulates the growth and activity of black holes and their host galaxies
• Modeling feedback from stars and black holes in galaxy mergers
• A Unified, Merger-Driven Model for the Origin of Starbursts, Quasars, the Cosmic X-Ray Background, Supermassive Black Holes and Galaxy Spheroids
• Black holes in galaxy mergers: The formation of red elliptical galaxies
• Damped Lyman alpha Systems
• A new photometric technique for the joint selection of star-forming and passive galaxies at 1.4<z<2.5
• Subaru Deep Survey V. A Census of Lyman Break Galaxies at z=4 and 5 in the Subaru Deep Fields: Photometric Properties
• The SDSS Damped Lya Survey: Data Release 3
• First detection of [CII]158um at high redshift: vigorous star formation in the early universe
• Lyman-alpha Emission from Structure Formation
• The Physical and Photometric Properties of High-Redshift Galaxies in Cosmological Hydrodynamic Simulations
• Massive galaxies & EROs at z=1-3 in cosmological hydrodynamic simulations: near-IR properties
• Massive galaxies in cosmological simulations: UV-selected sample at redshift z=2
• Radio continuum imaging of FIR luminous QSOs at z>6
• Lyman Break Galaxies at z = 4 - 6 in cosmological SPH Simulations
• C II Radiative Cooling of the Diffuse Gas in the Milky Way
• Measurement of the Spatial Cross-Correlation Function of Damped Lyman Alpha Systems and Lyman Break Galaxies
• Adaptive Mesh Refinement Simulations of the Ionization Structure and Kinematics of Damped Ly$\alpha$ Systems with Self-consistent Radiative Transfer

Cited by in corpus (22)

• The [CII] 158 micron line emission in high-redshift galaxies
• On the [CII]-SFR relation in high redshift galaxies
• Intensity Mapping of the [CII] Fine Structure Line during the Epoch of Reionization
• The reliability of [CII] as a star formation rate indicator
• Zooming on the internal structure of $z\simeq 6$ galaxies
• Interpreting ALMA Observations of the ISM During the Epoch of Reionisation
• Formation of simple organic molecules in inner T Tauri disks
• The art of modeling CO, [CI], and [CII] in cosmological galaxy formation models
• Lyman-alpha Emitters and Lyman-break Galaxies at z=3-6 in Cosmological SPH Simulations
• Starbursting [O III] emitters and quiescent [C II] emitters in the reionization era
• FIR line emission from high redshift galaxies
• A physical model for the [CII]-FIR deficit in luminous galaxies
• Star Formation from DLA Gas in the Outskirts of Lyman Break Galaxies at z~3
• Molecular clouds photoevaporation and FIR line emission
• The distribution and physical properties of high-redshift [OIII] emitters in a cosmological hydrodynamics simulation
• A new approach for testing variations of fundamental constants over cosmic epochs using FIR fine-structure lines
• Mapping metals at high redshift with far-infrared lines
• Radiative properties of the first galaxies: rapid transition between blue and red
• The ALMA-CRISTAL Survey: Spatial extent of [CII] line emission in star-forming galaxies at $z=4-6$
• Diagnosing the interstellar medium of galaxies with far-infrared emission lines I. The [C II] 158 microns line at z~0
• Extreme Galaxies During Reionization: Testing ISM and Disk Models
• DLAs and Galaxy Formation