News Release Archive:

News Release 298 of 1051

May 11, 2010 09:00 AM (EDT)

News Release Number: STScI-2010-14

Hubble Catches Heavyweight Runaway Star Speeding from 30 Doradus


Image: Hubble Observations of Massive Stars in the Large Magellanic Cloud

Hubble Observations of Massive Stars in the Large Magellanic Cloud

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This is the Hubble Space Telescope Cosmic Origins Spectrograph (COS) observation of 30 Dor #016 compared with one by the Hubble Space Telescope Imaging Spectrograph (STIS) of the similar star HDE 269810, also in the Large Magellanic Cloud.

The stellar-wind features of helium, carbon, oxygen, and nitrogen are identified by their chemical symbols above; the roman numerals indicate the ionization stages, i.e., the number of electrons removed plus one. ("I" would indicate the neutral atom.) The broad emission components plus blue-shifted absorption are diagnostics of the stellar winds; the absorption forms along the line of sight to the stellar disk, where the wind is approaching us at its full speed. The O V line is a unique feature of the hottest (O2-O3) stars.

The science figure is from C. Evans (Royal Observatory Edinburgh) and his runaway star research team's study, published on May 5, 2010 in the online issue of The Astrophysical Journal Letters.

Object Name: 30 Dor #016

Image Type: Illustration

Credit: NASA, ESA, and C. Evans, et al. (from The Astrophysical Journal, vol. 715, p. L74, 2010)


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