scholarly journals Spatial distribution of far-infrared emission in spiral galaxies. II. Heating sources and gas-to-dust ratio.

1997 ◽  
Vol 114 ◽  
pp. 946 ◽  
Author(s):  
Y. D. Mayya ◽  
T. N. Regaradjan
Keyword(s):  
Spatial Distribution ◽  
Spiral Galaxies ◽  
Far Infrared ◽  
Infrared Emission

scholarly journals The Spatial Distribution of the Far‐Infrared Emission in NGC 253

2002 ◽  
Vol 574 (2) ◽  
pp. 709-718 ◽  
Author(s):  
V. P. Melo ◽  
A. M. Perez Garcia ◽  
J. A. Acosta‐Pulido ◽  
C. Munoz‐Tunon ◽  
J. M. Rodriguez Espinosa
Keyword(s):  
Spatial Distribution ◽  
Far Infrared ◽  
Infrared Emission

scholarly journals 7.9. Far-infrared emission and gas to dust ratio in discs and central regions of galaxies

1998 ◽  
Vol 184 ◽  
pp. 309-310
Author(s):  
Y.D. Mayya ◽  
T.N. Rengarajan
Keyword(s):  
Spiral Galaxies ◽  
Radial Profile ◽  
Neutral Hydrogen ◽  
Far Infrared ◽  
Infrared Emission ◽  
Profile Data ◽  
V Band ◽  
Ngc 6946 ◽  
Radial Profiles ◽  
Central Regions

We study the radial profiles of radio comtinuum (RC) and far-infrared (FIR) emissions and also the gas to dust ratio for a sample of 22 spiral galaxies. For this, we use the data from IRAS HiRES FIR maps, available VLA 20 cm maps and radial profile data available on neutral hydrogen (H) and molecular hydrogen (H2, derived from velocity integrated CO intensity). In order to have enough resolution with the 1-1.5 arcminute IRAS beam, the galaxies chosen were large sized and had a 60 μm flux density of more than 5 Jy. The sample consists of: NGC 628, NGC 2403, NGC 2841, NGC 2903, NGC 3079, NGC 3198, NGC 3627, NGC 3628, NGC 4192, NGC 4254, NGC 4303, NGC 4321, NGC 4501, NGC 4535, NGC 4569, NGC 4656, NGC 4736, NGC 5033, NGC 5055, NGC 6503, NGC 6946 and NGC 7331. For 13 of these galaxies information is also available on metallicity (z) and V band CCD maps.

Far-infrared emission and star formation in spiral galaxies

1989 ◽  
Vol 342 ◽  
pp. 759 ◽  
Author(s):  
G. Trinchieri ◽  
G. Fabbiano ◽  
R. Bandiera
Keyword(s):  
Star Formation ◽  
Spiral Galaxies ◽  
Far Infrared ◽  
Infrared Emission

scholarly journals Intracluster Dust and Far Infrared Emission

2001 ◽  
Vol 204 ◽  
pp. 67-67
Author(s):  
Cristina C. Popescu ◽  
Richard J. Tuffs ◽  
Jörg Fischera ◽  
Heinrich Völk
Keyword(s):  
Spiral Galaxies ◽  
Dust Emission ◽  
Cosmic Ray ◽  
Far Infrared ◽  
Infrared Emission ◽  
Discrete Source ◽  
Injection Rate ◽  
Virgo Cluster ◽  
Optical Extinction ◽  
Young Clusters

We make predictions for the diffuse far-infrared (FIR) emission from dust in the intracluster medium (ICM) of the Virgo cluster. The dust injection rate from known sources in the cluster is unlikely to give rise to a detectable diffuse FIR IC emission. However, the outer regions of dynamically young clusters have a further potential source of IC grains since they are still accreting freshly infalling spiral galaxies which are presumably contained in an accreting intergalactic medium (IGM). We show that cosmic ray driven winds from the infalling spirals can inject grains into a subvirial IGM that is external to the observed X-ray-emitting ICM. Predictions for the Virgo cluster are generalised to other clusters, and the possibility of detection of dynamically young clusters at cosmological distances is discussed. Although dominated by the discrete source emission from galactic disks, it is possible that diffuse submillimeter dust emission from the ICM could be detected in experiments similar to those designed to map the submillimeter excess due to the Sunyaev-Zeldovich effect in distant clusters. We further discuss the implications of our proposed scenario for the optical extinction in clusters, as well as for the properties and dust content of the IGM. Further implications for the environmental effects on the chemical evolution of spiral galaxies are also considered.

Far infrared emission from magnetically quantised 2DEGs in GaAs/(AlGa)As heterojunctions

1994 ◽  
Vol 305 (1-3) ◽  
pp. 280-284 ◽  
Author(s):  
N.N. Zinov'ev ◽  
R. Fletcher ◽  
L.J. Challis ◽  
B. Sujak-Cyrul ◽  
A.V. Akimov ◽  
...  
Keyword(s):  
Far Infrared ◽  
Infrared Emission

scholarly journals Far-Infrared Emission from Clumpy Irregular Galaxies

1987 ◽  
Vol 115 ◽  
pp. 647-647
Author(s):  
U. Klein ◽  
J. Heidmann ◽  
R. Wielebinski ◽  
E. Wunderlich
Keyword(s):  
Star Formation ◽  
Star Formation Rate ◽  
Formation Rate ◽  
Hubble Constant ◽  
Far Infrared ◽  
Hii Regions ◽  
Infrared Emission ◽  
Star Forming ◽  
Irregular Galaxies

The four clumpy irregular galaxies Mkr 8, 296,297 and 325 have been observed by IRAS. All galaxies have been detected in at least two of the four detector bands. The ratios of the 100 to 60-m flux densities are comparable to those of HII regions or violently star forming galaxies. The average star formation rate in clumpy irregular galaxies is of the order of a few solar masses per year (based on their average far-infrared luminosity and a Hubble constant of 75 km s−1 Mpc−1.

Energy Sources of the Far‐Infrared Emission of M33

2004 ◽  
Vol 154 (1) ◽  
pp. 259-265 ◽  
Author(s):  
J. L. Hinz ◽  
G. H. Rieke ◽  
K. D. Gordon ◽  
P. G. Perez‐Gonzalez ◽  
C. W. Engelbracht ◽  
...  
Keyword(s):  
Far Infrared ◽  
Infrared Emission ◽  
Energy Sources
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