Details

Autor(en) / Beteiligte

• Dahlstrom, Julie
• York, Donald G
• Welty, Daniel E
• Oka, Takeshi
• Hobbs, L M
• Johnson, Sean
• Friedman, Scott D
• Jiang, Zihao
• Rachford, Brian L
• Sherman, Reid
• Snow, Theodore P
• SONNENTRUCKER, PAULE

Titel

ANOMALOUS DIFFUSE INTERSTELLAR BANDS IN THE SPECTRUM OF HERSCHEL 36. I. OBSERVATIONS OF ROTATIONALLY EXCITED CH AND CH super(+) ABSORPTION AND STRONG, EXTENDED REDWARD WINGS ON SEVERAL DIBs

Ist Teil von

• The Astrophysical journal, 2013-08, Vol.773 (1), p.1-18

Erscheinungsjahr

2013

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Anomalously broad diffuse interstellar bands (DIBs) at 5780.5, 5797.1, 6196.0, and 6613.6 A are found in absorption along the line of sight to Herschel 36, the star illuminating the bright Hourglass region of the H II region Messier 8. To our knowledge, neither those excited molecular lines nor such strongly extended DIBs have previously been seen in absorption from interstellar gas. These unusual features appear to arise in a small region near Herschel 36 which contains most of the neutral interstellar material in the sight line. Despite the intense local UV radiation field within the cluster NGC 6530, no previously undetected DIBs sponger than 10 mA in equivalent width are found in the optical spectrum of Herschel 36, suggesting that neither dissociation nor ionization of the carriers of the known DIBs by this intense field creates new carriers with easily detectable DIB-like features. Possibly related profile anomalies for several other DIBs are noted.