The historian Eusebius (of Nantes)

Sivan, Hagith

doi:10.2307/632162

Cited by 40 publications

(12 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Line ratios in reasonably metal-rich gas (Z = 0.008, Z , and Z = 0.05) are taken from Stasińska (1984) as they have been shown to be in good agreement with galactic HII region data (Sivan et al 1986). No further distinction is made between the 3 metallicities Z = 0.008, Z , and Z = 0.05, as galactic HII regions do show this full range of metallicities and their line ratios at fixed metallicity show considerable scatter.…”

Section: Gaseous Emissionmentioning

confidence: 95%

Spectral and photometric evolution of young stellar populations: The impact of gaseous emission at various metallicities

Anders¹,

Alvensleben²

2003

A&A

346

444

View full text Add to dashboard Cite

Abstract. We include gaseous continuum and line emission into our  models for the spectral and photometric evolution of Simple Stellar Populations (SSPs) for various metallicities in the range 0.02 ≤ Z/Z ≤ 2.5. This allows to extend them to significantly younger ages than before. They now cover the age range from 4 Myr all through 14 Gyr. We point out the very important contributions of gaseous emission to broad band fluxes and their strong metallicity dependence during very early evolutionary stages of star clusters, galaxies or subgalactic fragments with vigorous ongoing star formation. Emissionline contributions are commonly seen in these actively star-forming regions. Models without gaseous emission cannot explain their observed colors at all, or lead to wrong age estimates. We use up-to-date Lyman continuum (=Lyc) emission rates and decided to use recent empirical determinations of emission line ratios relative to H β for subsolar metallicities. We justify this approach for all situations where no or not enough spectral information is available to determine all the parameters required by photoionization models. The effects of gaseous line and continuum emission on broad band fluxes are shown for different metallicities and as a function of age. In addition to the many filter systems already included in our earlier models, we here also include the HST NICMOS and Advanced Camera for Surveys (=ACS) filter systems.

show abstract

Section: Gaseous Emissionmentioning

confidence: 95%

Spectral and photometric evolution of young stellar populations: The impact of gaseous emission at various metallicities

Anders¹,

Alvensleben²

2003

A&A

346

444

View full text Add to dashboard Cite

show abstract

“…An important feature is clear: very few DIG locations lie on the shocked part of the diagram (to the right of the line), and all of them are from the south and west sides of the galaxy. Because of the strong dependence of Sivan et al (1986) concluded that the observational points should be aligned on a vertical strip in this plot, when no variation in the nitrogen content is considered. The vertical column is not clear in this figure, either for DIG or H  locations.…”

Section: Looking For Shocksmentioning

confidence: 99%

“…The tracks indicate the temperature needed to ionize the medium only by photoionization. According to Sivan et al (1986), who also used photoionization models only, an ionization temperature for the DIG of 35 000 K was obtained for a sample of spiral galaxies as well as different places in the Milky Way. The situation in IC 10 is very different: in order to ionize half of the DIG locations, temperatures higher than 50 000 K are required.…”

Section: What Is the Ionization Source Of The Dig In Ic 10?mentioning

confidence: 99%

Physical conditions in the dwarf local irregular galaxy IC 10

Hidalgo-Gámez

2005

A&A

View full text Add to dashboard Cite

A detailed analysis of the physical conditions of the Interstellar Medium in the main body of the Local Group dwarf irregular galaxy IC 10 is carried out using long-slit spectroscopy. Maps of the excitation, the Hα flux, [NII]/Hα and [SII]/Hα are presented. The Diffuse Ionized Gas inside the galaxy is studied. We found that the spectral characteristics are not similar to those of spiral galaxies: the values of the ratios [NII]/Hα and [SII]/Hα are not as large as in spiral galaxies but the excitation is much larger. These values, especially the large excitation, can be explained by proposing an extra source of ionization. Different sources are studied but any of the models at hand could be really fitted except a combination of photons leaking from the H  regions in addition to the ionization provided by the WR stars present in this galaxy. Shocks are not needed to explain the line intensity ratios except in a small part in the west side of the galaxy.

show abstract

“… 103 This first siege of Thessalonica is presumably the subject of FGrH 101 (Eusebius), F 1. See Sivan 1992: 159; Janiszewski 2006: 67–9; Favuzzi 2011.…”

mentioning

confidence: 99%

Dexippus and the Gothic Invasions: Interpreting the New Vienna Fragment (Codex Vindobonensis Hist. gr.73, ff. 192^v–193^r)

Mallan¹,

Davenport

2015

J. Rom. Stud.

View full text Add to dashboard Cite

This article presents an English translation and analysis of a new historical fragment, probably from Dexippus’Scythica, published by Gunther Martin and Jana Grusková in 2014. The fragment, preserved in a palimpsest in the Austrian National Library, describes a Gothic attack on Thessalonica and the subsequent preparations of the Greeks to repel the barbarian force as it moved south into Achaia. The new text provides several important details of historical, prosopographical and historiographical significance, which challenge both our existing understanding of the events in Greece during the reign of Gallienus and the reading of the main literary sources for this period. In this article we look to secure the Dexippan authorship of the fragment, identify the individuals named in the text, and date the events described in the text to the early 260sa.d.

show abstract

The historian Eusebius (of Nantes)

Cited by 40 publications

References 1 publication

Spectral and photometric evolution of young stellar populations: The impact of gaseous emission at various metallicities

Spectral and photometric evolution of young stellar populations: The impact of gaseous emission at various metallicities

Physical conditions in the dwarf local irregular galaxy IC 10

Dexippus and the Gothic Invasions: Interpreting the New Vienna Fragment (Codex Vindobonensis Hist. gr.73, ff. 192^v–193^r)

Contact Info

Product

Resources

About

The historian Eusebius (of Nantes)

Cited by 40 publications

References 1 publication

Spectral and photometric evolution of young stellar populations: The impact of gaseous emission at various metallicities

Spectral and photometric evolution of young stellar populations: The impact of gaseous emission at various metallicities

Physical conditions in the dwarf local irregular galaxy IC 10

Dexippus and the Gothic Invasions: Interpreting the New Vienna Fragment (Codex Vindobonensis Hist. gr.73, ff. 192v–193r)

Contact Info

Product

Resources

About

Dexippus and the Gothic Invasions: Interpreting the New Vienna Fragment (Codex Vindobonensis Hist. gr.73, ff. 192^v–193^r)