activity
19972026
most citedHabitat of early life: Solar X-ray and UV radiation at Earth's surface 4-3.5 billion years ago

163 citations · 883 across the 25 of their papers we have counts for

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Showing 2004Show all

8 papers · 1 filter

astro-ph2004

Iron Fluorescent Line Emission from Young Stellar Objects in the Orion Nebula

M. Tsujimoto, E. D. Feigelson, N. Grosso +5

We present the result of a systematic search for the iron Kalpha fluorescent line at 6.4 keV among 1616 X-ray sources detected by ultra-deep Chandra observations of the Orion Nebul…

astro-ph2004★ 3 cited

Accretion, fluorescent X-ray emission and flaring magnetic structures in YSOs

F. Favata

I present some recent developments on high-energy phenomena in YSOs, concentrating on the new evidence for accretion-induced X-ray emission in YSOs, for Fe 6.4 keV fluorescent emis…

astro-ph2004

A survey for Fe 6.4 keV emission in young stellar objects in rho Oph: the strong fluorescence from Elias 29

F. Favata, G. Micela, B. Silva +2

We report the results of a search for 6.4 keV Fe fluorescent emission in Young Stellar Objects (YSOs) with measured accretion luminosities in the rho Oph cloud, using all existing…

astro-ph2004

Inferring coronal structure from X-ray lightcurves and Doppler shifts: a Chandra study of AB Doradus

G. A. J. Hussain, N. S. Brickhouse, A. K. Dupree +6

The Chandra X-ray observatory monitored the single cool star, AB Doradus, continuously for a period lasting 88 ksec (1.98 Prot) in 2002 December with the LETG/HRC-S. The X-ray ligh…

astro-ph2004

Inferring coronal structure using X-ray spectra: A Chandra study of AB Dor

G. A. J. Hussain, N. S. Brickhouse, A. K. Dupree +5

The Chandra X-ray observatory monitored the single cool star, AB Doradus, continuously for a period lasting 88ksec (1.98 Prot) in 2002 December with the LETG/HRC-S. The X-ray light…

astro-ph2004

The photospheric abundances of active binaries III. Abundance peculiarities at high activity level

T. Morel, G. Micela, F. Favata +1

We report the determination from high-resolution spectra of the atmospheric parameters and abundances of 13 chemical species (among which lithium) in 8 single-lined active binaries…