scholarly journals Mid-Infrared Images of Luminous Infrared Galaxies in a Merging Sequence

1999 ◽  
Vol 511 (1) ◽  
pp. L17-L20 ◽  
Author(s):  
Chorng-Yuan Hwang ◽  
K. Y. Lo ◽  
Yu Gao ◽  
Robert A. Gruendl ◽  
Nanyao Y. Lu
Keyword(s):  
Infrared Images ◽  
Infrared Galaxies ◽  
Mid Infrared ◽  
Luminous Infrared Galaxies

scholarly journals Luminous Infrared Galaxies in a Merging Sequence: ISO Observations

1999 ◽  
Vol 186 ◽  
pp. 282-282 ◽  
Author(s):  
C.-Y. Hwang ◽  
K.Y. Lo ◽  
Y. Gao ◽  
R.A. Gruendl ◽  
N.-Y. Lu
Keyword(s):  
High Spatial Resolution ◽  
Molecular Gas ◽  
Infrared Images ◽  
Infrared Galaxies ◽  
Space Observatory ◽  
Infrared Space Observatory ◽  
Mid Infrared ◽  
Luminous Infrared Galaxies ◽  
Physical Conditions ◽  
Galaxy Interaction

We report mid-infrared images of several luminous infrared galaxies (LIGs) taken with ISOCAM on the Infrared Space Observatory (ISO). These LIGs were chosen to represent different phases of a merger sequence of galaxy-galaxy interaction with special emphasis on early/intermediate stages of merging. The molecular gas distribution of these LIGs has also been mapped at high spatial resolution (see contribution by Gao et al., this volume). The goal is to do a synoptic study of the evolution of physical conditions in these LIGs along the merger sequence.

scholarly journals ULTRA-DEEP MID-INFRARED SPECTROSCOPY OF LUMINOUS INFRARED GALAXIES ATz∼ 1 ANDz∼ 2

2010 ◽  
Vol 719 (1) ◽  
pp. 425-450 ◽  
Author(s):  
Dario Fadda ◽  
Lin Yan ◽  
Guilaine Lagache ◽  
Anna Sajina ◽  
Dieter Lutz ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Infrared Galaxies ◽  
Mid Infrared ◽  
Mid Infrared Spectroscopy ◽  
Luminous Infrared Galaxies

scholarly journals Local luminous infrared galaxies: Spatially resolved mid-infrared observations with Spitzer/IRS

2010 ◽  
Vol 45 (1) ◽  
pp. 99-111 ◽  
Author(s):  
Almudena Alonso-Herrero ◽  
Miguel Pereira-Santaella ◽  
George H. Rieke ◽  
Luis Colina ◽  
Charles W. Engelbracht ◽  
...  
Keyword(s):  
Infrared Galaxies ◽  
Mid Infrared ◽  
Infrared Observations ◽  
Luminous Infrared Galaxies ◽  
Spatially Resolved

scholarly journals MID-INFRARED PROPERTIES OF NEARBY LUMINOUS INFRARED GALAXIES. I. SPITZER INFRARED SPECTROGRAPH SPECTRA FOR THE GOALS SAMPLE

2013 ◽  
Vol 206 (1) ◽  
pp. 1 ◽  
Author(s):  
S. Stierwalt ◽  
L. Armus ◽  
J. A. Surace ◽  
H. Inami ◽  
A. O. Petric ◽  
...  
Keyword(s):  
Infrared Galaxies ◽  
Mid Infrared ◽  
Luminous Infrared Galaxies

scholarly journals MID-INFRARED PROPERTIES OF LUMINOUS INFRARED GALAXIES. II. PROBING THE DUST AND GAS PHYSICS OF THE GOALS SAMPLE

2014 ◽  
Vol 790 (2) ◽  
pp. 124 ◽  
Author(s):  
S. Stierwalt ◽  
L. Armus ◽  
V. Charmandaris ◽  
T. Diaz-Santos ◽  
J. Marshall ◽  
...  
Keyword(s):  
Infrared Galaxies ◽  
Mid Infrared ◽  
Luminous Infrared Galaxies

scholarly journals MID-INFRARED SPECTRAL DIAGNOSTICS OF LUMINOUS INFRARED GALAXIES

2011 ◽  
Vol 730 (1) ◽  
pp. 28 ◽  
Author(s):  
A. O. Petric ◽  
L. Armus ◽  
J. Howell ◽  
B. Chan ◽  
J. M. Mazzarella ◽  
...  
Keyword(s):  
Infrared Galaxies ◽  
Mid Infrared ◽  
Luminous Infrared Galaxies ◽  
Spectral Diagnostics ◽  
Infrared Spectral

scholarly journals The OTELO survey

2019 ◽  
Vol 631 ◽  
pp. A11 ◽  
Author(s):  
Marina Ramón-Pérez ◽  
Ángel Bongiovanni ◽  
Ana María Pérez García ◽  
Jordi Cepa ◽  
Jakub Nadolny ◽  
...  
Keyword(s):  
Equivalent Width ◽  
Emission Lines ◽  
X Rays ◽  
Late Type ◽  
Infrared Galaxies ◽  
Mid Infrared ◽  
Star Forming ◽  
Luminous Infrared Galaxies ◽  
Different Types ◽  
Tunable Emission

Aims. We take advantage of the capabilities of the OSIRIS Tunable Emission Line Object (OTELO) survey to select and study the AGN population in the field. In particular, we aim to perform an analysis of the properties of these objects, including their demography, morphology, and IR luminosity. Focusing on the population of Hα emitters at z ∼ 0.4, we also aim to study the environments of AGN and non-AGN galaxies at that redshift. methods. We make use of the multiwavelength catalogue of objects in the field compiled by the OTELO survey, unique in terms of minimum flux and equivalent width. We also take advantage of the pseudo-spectra built for each source, which allow the identification of emission lines and the discrimination of different types of objects. Results. We obtained a sample of 72 AGNs in the field of OTELO, selected with four different methods in the optical, X-rays, and mid-infrared bands. We find that using X-rays is the most efficient way to select AGNs. An analysis was performed on the AGN population of OTELO in order to characterise its members. At z ∼ 0.4, we find that up to 26% of our Hα emitters are AGNs. At that redshift, AGNs are found in identical environments to non-AGNs, although they represent the most clustered group when compared to passive and star-forming galaxies. The majority of our AGNs at any redshift were classified as late-type galaxies, including a 16% proportion of irregulars. Another 16% of AGNs show signs of interactions or mergers. Regarding the infrared luminosity, we are able to recover all the luminous infrared galaxies (LIRGs) in the field of OTELO up to z ∼ 1.6. We find that the proportion of LIRGs and ultra-luminous infraed galaxies (ULIRGs) is higher among the AGN population, and that ULIRGs show a higher fraction of AGNs than LIRGs.

scholarly journals The AKARI 2.5–5 micron spectra of luminous infrared galaxies in the local Universe

2018 ◽  
Vol 617 ◽  
pp. A130 ◽  
Author(s):  
H. Inami ◽  
L. Armus ◽  
H. Matsuhara ◽  
V. Charmandaris ◽  
T. Díaz-Santos ◽  
...  
Keyword(s):  
Continuum Emission ◽  
Absorption Feature ◽  
Infrared Galaxies ◽  
Mid Infrared ◽  
Dust Extinction ◽  
Luminous Infrared Galaxies ◽  
Hydrogen Recombination ◽  
Diagnostic Diagram ◽  
High Ionization ◽  
Polycyclic Aromatic

We present AKARI 2.5–5 μm spectra of 145 local luminous infrared galaxies (LIRG; LIR ≥ 1011 L⊙) in the Great Observatories All-sky LIRG Survey (GOALS). In all of the spectra, we measure the line fluxes and equivalent widths (EQWs) of the polycyclic aromatic hydrocarbon (PAH) at 3.3 μm and the hydrogen recombination line Brα at 4.05 μm, with apertures matched to the slit sizes of the Spitzer low-resolution spectrograph and with an aperture covering ∼95% of the total flux in the AKARI two-dimensional (2D) spectra. The star formation rates (SFRs) derived from the Brα emission measured in the latter aperture agree well with SFRs estimated from LIR, when the dust extinction correction is adopted based on the 9.7 μm silicate absorption feature. Together with the Spitzer Infrared Spectrograph (IRS) 5.2–38 μm spectra, we are able to compare the emission of the PAH features detected at 3.3 μm and 6.2 μm. These are the two most commonly used near/mid-infrared indicators of starburst or active galactic nucleus (AGN) dominated galaxies. We find that the 3.3 μm and 6.2 μm PAH EQWs do not follow a linear correlation and at least a third of the galaxies classified as AGN-dominated sources using the 3.3 μm feature are classified as starbursts based on the 6.2 μm feature. These galaxies have a bluer continuum slope than galaxies that are indicated to be starburst-dominated by both PAH features. The bluer continuum emission suggests that their continuum is dominated by stellar emission rather than hot dust. We also find that the median Spitzer/IRS spectra of these sources are remarkably similar to the pure starburst-dominated sources indicated by high PAH EQWs in both 3.3 μm and 6.2 μm. Based on these results, we propose a revised starburst/AGN diagnostic diagram using 2–5 μm data: the 3.3 μm PAH EQW and the continuum color, Fν(4.3 μm)/Fν(2.8 μm). We use the AKARI and Spitzer spectra to examine the performance of our new starburst/AGN diagnostics and to estimate 3.3 μm PAH fluxes using the James Webb Space Telescope (JWST) photometric bands in the redshift range 0 < z < 5. Of the known PAH features and mid-infrared high ionization emission lines used as starburst/AGN indicators, only the 3.3 μm PAH feature is observable with JWST at z > 3.5, because the rest of the features at longer wavelengths fall outside the JWST wavelength coverage.

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