The X-ray origin of Herbig AeBe systems: New insights

Murad Hamidouche, Shiya Wang, Leslie W. Looney

Research output: Contribution to journalArticlepeer-review


We present a statistical study of the X-ray emission toward 22 Herbig AeBe stars (HAEBE) using the Chandra archive. We probe the origin of the X-rays toward Herbig stars: are they intrinsic?This question is addressed by correlations between the physical stellar properties and the X-ray emission. There is a weak correlation between the continuum radio emission at λ = 3.6 cm and L X, which suggests that the X-ray emission depends upon the source. On the other hand, no correlation was found with the stellar rotational period, but that only excludes solar-like magnetic activity as the origin of the X-rays. Most importantly, the X-ray luminosity of HAEBE has a different distribution from that of T Tauri stars, suggesting that X-ray emission from an unseen late-type star companion can be ruled out with an 80% confidence level. This implies that the HAEBE must have magnetic activity. In addition, we report the observation of five sources for the first time, in three detections.

Original languageEnglish (US)
Pages (from-to)1474-1481
Number of pages8
JournalAstronomical Journal
Issue number4
StatePublished - Apr 1 2008


  • Methods: statistical
  • Radiation mechanisms: thermal
  • Stars: pre-main sequence
  • X-rays: stars

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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