A study of star formation in Shapley-Ames spiral galaxies based on IRAS far-infrared observations

1985 ◽  
pp. 111-114
Author(s):  
K. Brink ◽  
T. de Jong
Keyword(s):  
Star Formation ◽  
Spiral Galaxies ◽  
Far Infrared ◽  
Infrared Observations

Testing models of low-mass star formation - High-resolution far-infrared observations of L1551 IRS 5

1991 ◽  
Vol 376 ◽  
pp. 636 ◽  
Author(s):  
Harold M. Butner ◽  
Neal J., II Evans ◽  
Daniel F. Lester ◽  
Russell M. Levreault ◽  
Stephen E. Strom
Keyword(s):  
Star Formation ◽  
High Resolution ◽  
Far Infrared ◽  
Mass Star ◽  
Infrared Observations ◽  
Low Mass

Star formation at a front - Far-infrared observations of AFGL 333

1979 ◽  
Vol 229 ◽  
pp. L133 ◽  
Author(s):  
H. A., Jr. Thronson ◽  
P. M. Harvey ◽  
I. Gatley
Keyword(s):  
Star Formation ◽  
Far Infrared ◽  
Infrared Observations

scholarly journals Star Formation in Outer Galaxy Molecular Clouds

1987 ◽  
Vol 115 ◽  
pp. 483-494
Author(s):  
Marc L. Kutner
Keyword(s):  
Star Formation ◽  
Molecular Clouds ◽  
Far Infrared ◽  
B Stars ◽  
Infrared Observations

A variety of observations of molecular clouds outside the solar circle (mostly around R = 14 kpc) are reported. Maps of CO, 13CO (J = 1 → 0) and CO (J = 2 → 1) emission are discussed. Cloud sizes and masses range up to the GMC class. However, envelope kinetic temperatures are lower than those in GMCs in the molecular ring. Continuum observations, using the VLA at 6 cm and 20 cm, and far infrared observations, taken on the Kuiper Airborne Observatory, suggest the presence of newly formed late O and early B stars.

scholarly journals The Interstellar Medium in Star Burst Galaxies

1987 ◽  
Vol 115 ◽  
pp. 614-614
Author(s):  
R. Genzel ◽  
J. B. Lugten ◽  
M. K. Crawford ◽  
D. M. Watson
Keyword(s):  
Star Formation ◽  
Interstellar Medium ◽  
Line Emission ◽  
Far Infrared ◽  
High Rate ◽  
Interstellar Gas ◽  
Infrared Observations ◽  
Bolometric Luminosity ◽  
Neutral Gas ◽  
Molecular Lines

We report far-infrared observations of [0 I], [C II] and [O III] fine structure emission lines toward the nuclei of M82 and 7 other galaxies with a high rate of star formation. The far-infrared line emission is bright, contains about 0.5% of the bolometric luminosity in the central 60″, and is spatially concentrated toward the nuclei. In these galaxies between 10 and 30% of the interstellar gas near the nuclei is contained in a warm, atomic component. This atomic gas is probably located at the UV photodissociated surfaces of molecular clouds. The neutral gas in M82 has a temperature of ∼ 200 K, hydrogen density of ∼ 3 × 104 cm−3 and is very clumpy, indicating that the interstellar medium in this star burst galaxy is very different from that in the disk of our own galaxy. We discuss the implications of the infrared observations for the interpretation of mm molecular lines and for star formation at the nuclei of star burst galaxies.

scholarly journals Kiloparsec-scale star formation law in M 81 and M 101 based on AKARI far-infrared observations

2010 ◽  
Vol 521 ◽  
pp. A48 ◽  
Author(s):  
T. Suzuki ◽  
H. Kaneda ◽  
T. Onaka ◽  
T. Nakagawa ◽  
H. Shibai
Keyword(s):  
Star Formation ◽  
Far Infrared ◽  
Infrared Observations

scholarly journals Study of star formation in RCW 106 using far-infrared observations

2001 ◽  
Vol 326 (1) ◽  
pp. 293-302 ◽  
Author(s):  
A.D. Karnik ◽  
S.K. Ghosh ◽  
T.N. Rengarajan ◽  
R.P. Verma
Keyword(s):  
Star Formation ◽  
Far Infrared ◽  
Infrared Observations

scholarly journals Exploring the Dust Content of Galactic Halos with Herschel*. III. NGC 891

2020 ◽  
Author(s):  
J H Yoon ◽  
C L Martin ◽  
S Veilleux ◽  
M Meléndez ◽  
T Mueller ◽  
...  
Keyword(s):  
Star Formation ◽  
Surface Density ◽  
Thermal Emission ◽  
Formation Rate ◽  
Critical Role ◽  
Cosmic Ray ◽  
Far Infrared ◽  
Starburst Galaxy ◽  
Galactic Halos ◽  
Infrared Observations

Abstract We present deep far-infrared observations of the nearby edge-on galaxy NGC 891 obtained with the Herschel Space Observatory and the Spitzer Space Telescope. The maps confirm the detection of thermal emission from the inner circumgalactic medium (halo) and spatially resolve a dusty superbubble and a dust spur (filament). The dust temperature of the halo component is lower than that of the disk but increases across a region of diameter ≈8.0 kpc extending at least 7.7 kpc vertically from one side of the disk, a region we call a superbubble because of its association with thermal X-ray emission and a minimum in the synchrotron scaleheight. This outflow is breaking through the thick disk and developing into a galactic wind, which is of particular interest because NGC 891 is not considered a starburst galaxy; the star formation rate surface density, 0.03M⊙ yr−1 kpc−2, and gas fraction, just $10\%$ in the inner disk, indicate the threshold for wind formation is lower than previous work has suggested. We conclude that the star formation surface density is sufficient for superbubble blowout into the halo, but the cosmic ray electrons may play a critical role in determining whether this outflow develops into a fountain or escapes from the gravitational potential. The high dust-to-gas ratio in the dust spur suggests the material was pulled out of NGC 891 through the collision of a minihalo with the disk of NGC 891. We conclude that NGC 891 offers an example of both feedback and satellite interactions transporting dust into the halo of a typical galaxy.

scholarly journals Search for Hα Emitters at z ∼ 7.8: A Constraint on the Hα-based Star Formation Rate Density

2022 ◽  
Vol 924 (2) ◽  
pp. 71
Author(s):  
Yoshihisa Asada ◽  
Kouji Ohta
Keyword(s):  
Star Formation ◽  
Luminosity Function ◽  
Rest Frame ◽  
Star Formation Rate ◽  
Formation Rate ◽  
Far Infrared ◽  
Infrared Observations ◽  
Upper Limit ◽  
Star Formation Activity

Abstract We search for Hα emitters at z ∼ 7.8 in four gravitationally lensed fields observed in the Hubble Frontier Fields program. We use the Lyman break method to select galaxies at the target redshift and perform photometry in the Spitzer/IRAC 5.8 μm band to detect Hα emission from the candidate galaxies. We find no significant detections of counterparts in the IRAC 5.8 μm band, and this gives a constraint on the Hα luminosity function (LF) at z ∼ 7.8. We compare the constraint with previous studies based on rest-frame UV and far-infrared observations using the correlation between the Hα luminosity and the star formation rate. Additionally, we convert the constraint on the Hα LF into an upper limit for the star formation rate density (SFRD) at this epoch assuming the shape of the LF. We examine two types of parameterization of the LF and obtain an upper limit for the SFRD of log 10 ( ρ SFR [ M ⊙ yr − 1 Mpc − 3 ] ) ≲ − 1.1 at z ∼ 7.8. With this constraint on the SFRD, we present an independent probe into the total star formation activity including dust-obscured and unobscured star formation at the Epoch of Reionization.

Infrared Luminosities of Markarian Starburst Galaxies

1987 ◽  
Vol 115 ◽  
pp. 640-641
Author(s):  
S. P. Willner ◽  
L. K. Deutsch
Keyword(s):  
Star Formation ◽  
Emission Line ◽  
Spiral Galaxies ◽  
Far Infrared ◽  
Starburst Galaxies ◽  
Optical Observations ◽  
Narrow Line ◽  
Line Widths ◽  
Almost All ◽  
Normal Spiral

Optical observations (Balzano 1983) have found many galaxies with unusually blue colors, stellar or semi-stellar nuclei, and emission line spectra with narrow line widths and line ratios implying stellar ionization. Balzano concluded that these properties could be explained by a recent burst of star formation; since almost all of the galaxies were selected from the Markarian lists, they are referred to as “Markarian starburst galaxies.” We have compared the far infrared luminosities of these galaxies with a sample of normal spiral galaxies (Scoville et al. 1983). We have also compared the far infrared luminosities of the Markarian starburst galaxies to their blue light and Hα luminosities.

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
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