117 citations · 217 across the 8 of their papers we have counts for
16 papers
The Early Spectra of Eta Carinae 1892 to 1941 and the Onset of Its High Excitation Emission Spectrum
Roberta M. Humphreys, Kris Davidson, Michael Koppleman
The observed behavior of eta Car from 1860 to 1940 has not been considered in most recent accounts, nor has it been explained in any quantitative model. We have used modern digital…
The Chrysalis Opens? Photometry from the Eta Carinae HST Treasury Project, 2002-2006
J. C. Martin, Kris Davidson, M. D. Koppelman
During the past decade Eta Car has brightened markedly, possibly indicating a change of state. Here we summarize photometry gathered by the Hubble Space Telescope as part of the HS…
Spitzer Space Telescope Infrared Imaging and Spectroscopy of the Crab Nebula
Tea Temim, Robert D. Gehrz, Charles E. Woodward +7
We present 3.6, 4.5, 5.8, 8.0, 24, and 70 micron images of the Crab Nebula obtained with the Spitzer Space Telescope IRAC and MIPS cameras, Low- and High-resolution Spitzer IRS spe…
Variable Unidentified Emission Near 6307 AA in Eta Carinae
J. C. Martin, K. Davidson, F. Hamann +2
We have discovered a conspicuous unidentified variable feature near 6307 AA in the spectrum of Eta Carinae which is spatially unresolved from the central star and its wind (r < 200…
Physical conditions in the Homunculus
Gary J. Ferland, Nick Abel, Kris Davidson +1
Conditions within the Homunculus nebula around Eta Car are determined by many of the same physical processes that occur in molecular clouds in the interstellar medium. But there is…
A spectroscopic event of eta Car viewed from different directions: The data and first results
Otmar Stahl, Kerstin Weis, Dominik J. Bomans +3
We present spectroscopic observations with high spectral resolution of eta Car as seen by the SE lobe of the Homunculus nebula over the 2003.5 "spectroscopic event". The observed s…