Geysers in the Lagoon: new Herbig-Haro objects in M8

Abstract

Aims: We search for direct evidence of ongoing star formation by accretion in the Lagoon Nebula (M8), using optical wide-field narrow-band imaging obtained at La Silla Observatory. Methods: We examine [SII] and Halpha images for line-emission features that could be interpreted as signatures of outflow activity of the exciting sources. Results: We discover five new Herbig-Haro objects, study in detail their morphology and attempt to identify their potential driving sources among the population of T Tauri stars and embedded sources in the surroundings. Conclusions: The results reported here conclusively demonstrate the existence of very young stars going through the accreting phase in the M8 region.

9 pages, 6 postscript figures (one in color). Accepted, Astronomy and Astrophysics

References in corpus (6)

• On the Evolutionary Status of Class I Stars and Herbig-Haro Energy Sources in Taurus-Auriga
• The Star Formation Region NGC 6530: distance, ages and Initial Mass Function
• X-ray Emission from Orion Nebula Cluster Stars with Circumstellar Disks and Jets
• The infrared Hourglass cluster in M8
• High-Resolution NIR Observations of the Circumstellar Disk System in the Bok Globule CB 26
• Pre-main sequence stars in the Lagoon Nebula (M8)

Cited by in corpus (3)

• The Villafranca catalog of Galactic OB groups. II. From Gaia DR2 to EDR3 and ten new systems with O stars
• GEMINI near-infrared spectroscopic observations of young massive stars embedded in molecular clouds
• Small-spatial scale variations of nebular properties and the abundance discrepancy in three Galactic HII regions