Proceedings Of The Workshop On Star Forming Dwarf Galaxies And Related Objects July 1 3 1985 Institute Dadtrophysique Ie Dastrophysique Paris France PDF Download
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Author | : Daniel Kunth |
Publisher | : |
Total Pages | : 517 |
Release | : 1986 |
Genre | : Galaxies |
ISBN | : |
Download Proceedings of the Workshop on Star-forming Dwarf Galaxies and Related Objects, July 1-3, 1985, Institute D'Adtrophysique [i.e. D'Astrophysique], Paris, France Book in PDF, ePub and Kindle
Author | : D. Kunth |
Publisher | : Atlantica Séguier Frontières |
Total Pages | : 540 |
Release | : 1985 |
Genre | : Dwarf galaxies |
ISBN | : 9782863320372 |
Download Star-forming Dwarf Galaxies and Related Objects Book in PDF, ePub and Kindle
Author | : D. Kunth |
Publisher | : Atlantica Séguier Frontières |
Total Pages | : 668 |
Release | : 1996 |
Genre | : Cosmology |
ISBN | : 9782863321942 |
Download The Interplay Between Massive Star Formation, the ISM and Galaxy Evolution Book in PDF, ePub and Kindle
Author | : Polychronis Papaderos |
Publisher | : Springer Science & Business Media |
Total Pages | : 347 |
Release | : 2012-04-23 |
Genre | : Science |
ISBN | : 3642220185 |
Download Dwarf Galaxies: Keys to Galaxy Formation and Evolution Book in PDF, ePub and Kindle
Dwarf galaxy research constitutes an extremely vibrant field of astrophysical research, with many long-standing questions still unsettled and new ones constantly arising. The intriguing diversity of the dwarf galaxy population, observed with advanced ground-based and space-borne observatories over a wide spectral window providing an unprecedented level of detail, poses new challenges for both observers and theoreticians. The aim of this symposium was to bring together these two groups to exchange ideas and new results on the many evolutionary aspects of and open issues concerning dwarf galaxies. The main topics addressed include: the birth of dwarf galaxies: theoretical concepts and observable relics across wavelengths and time, the morphological, structural and chemical evolution of dwarf galaxies, possible evolutionary connections between early-type and late-type dwarfs, the star formation history of dwarf galaxies and its dependence on intrinsic and environmental properties, the origin and implications of starburst activity in dwarf galaxies, the fate of dwarfish systems born out of tidally ejected matter in galaxy collisions.
Author | : Ralph E. Pudritz |
Publisher | : Springer |
Total Pages | : 696 |
Release | : 1988-05-31 |
Genre | : Science |
ISBN | : |
Download Galactic and Extragalactic Star Formation Book in PDF, ePub and Kindle
Proceedings of the NATO Advanced Study Institute, Whistler, B.C., Canada, June 21-July 4, 1987
Author | : Jose Franco |
Publisher | : |
Total Pages | : 393 |
Release | : 1993 |
Genre | : |
ISBN | : |
Download Star Formation, Galaxies and the Interstellar Medium Book in PDF, ePub and Kindle
Author | : Carlos S. Frenk |
Publisher | : Springer |
Total Pages | : 480 |
Release | : 1989-04-30 |
Genre | : Science |
ISBN | : |
Download The Epoch of Galaxy Formation Book in PDF, ePub and Kindle
Proceedings of the NATO Advanced Research Workshop, Durham, U.K., July 18-22, 1988
Author | : Jacqueline Ann Monkiewicz |
Publisher | : |
Total Pages | : 177 |
Release | : 2018 |
Genre | : Dwarf galaxies |
ISBN | : |
Download Dwarf Galaxies as Laboratories of Protogalaxy Physics Book in PDF, ePub and Kindle
In the upcoming decade, powerful new astronomical facilities such as the James Webb Space Telescope (JWST), the Square Kilometer Array (SKA), and ground-based 30-meter telescopes will open up the epoch of reionization to direct astronomical observation. One of the primary tools used to understand the bulk astrophysical properties of the high-redshift universe are empirically-derived star-forming laws, which relate observed luminosity to fundamental astrophysical quantities such as star formation rate. The radio/infrared relation is one of the more mysterious of these relations: despite its somewhat uncertain astrophysical origins, this relation is extremely tight and linear, with 0.3 dex of scatter over five orders of magnitude in galaxy luminosity. The effects of primordial metallicities on canonical star-forming laws is an open question: a growing body of evidence suggests that the current empirical star forming laws may not be valid in the unenriched, metal-poor environment of the very early universe. In the modern universe, nearby dwarf galaxies with less than 1/10th the Solar metal abundance provide an opportunity to recalibrate our star formation laws and study the astrophysics of extremely metal-deficient (XMD) environments in detail. I assemble a sample of nearby dwarf galaxies, all within 100 megaparsecs, with nebular oxygen abundances between 1/5th and 1/50th Solar. I identify the subsample of these galaxies with space-based mid- and far-infrared data, and investigate the effects of extreme metallicities on the infrared-radio relationship. For ten of these galaxies, I have acquired 40 hours of observations with the Jansky Very Large Array (JVLA). C-band (4-8 GHz) radio continuum emission is detected from all 10 of these galaxies. These represent the first radio continuum detections from seven galaxies in this sample: Leo A, UGC 4704, HS 0822+3542, SBS 0940+544, and SBS 1129+476. The radio continuum in these galaxies is strongly associated with the presence of optical H-alpha emission, with spectral slopes suggesting a mix of thermal and non-thermal sources. I use the ratio of the radio and far-infrared emission to investigate behavior of the C-band (4-8 GHz) radio/infrared relation at metallicities below 1/10th Solar. I compare the low metallicity sample with the 4.8 GHz radio/infrared relationship from the KINGFISHER nearby galaxy sample Tabatabaei et al. 2017 and to the 1.4 GHz radio/infrared relationship from the blue compact dwarf galaxy sample of Wu et al. 2008. The infrared/radio ratio q of the low metallicity galaxies is below the average q of star forming galaxies in the modern universe. I compare these galaxies' infrared and radio luminosities to their corresponding Halpha luminosities, and find that both the infrared/Halpha and the radio/H-alpha ratios are reduced by nearly 1 dex in the low metallicity sample vs. higher metallicity galaxies; however the deficit is not straightforwardly interpreted as a metallicity effect.