The Discovery of Herbig-Haro Objects in LDN 673

Abstract

We report the discovery of twelve faint Herbig-Haro (HH) objects in LDN 673 found using a novel color-composite imaging method that reveals faint Hα emission in complex environments. Follow-up observations in [S II] confirmed their classification as HH objects. Potential driving sources are identified from the Spitzer c2d Legacy Program catalog and other infrared observations. The twelve new HH objects can be divided into three groups: Four are likely associated with a cluster of eight YSO class I/II IR sources that lie between them; five are colinear with the T Tauri multiple star system AS 353, and are likely driven by the same source as HH 32 and HH 332; three are bisected by a very red source that coincides with an infrared dark cloud. We also provide updated coordinates for the three components of HH 332. Inaccurate numbers were given for this object in the discovery paper. The discovery of HH objects and associated driving sources in this region provides new evidence for star formation in the Aquila clouds, implying a much larger T Tauri population in a seldom-studied region.

References in corpus (12)

• The Infrared Array Camera (IRAC) for the Spitzer Space Telescope
• The Spitzer Space Telescope Mission
• The USNO-B Catalog
• The Spitzer c2d Legacy Results: Star Formation Rates and Efficiencies; Evolution and Lifetimes
• From Molecular Cores to Planet-forming Disks: A SIRTF Legacy Program
• The Aquila prestellar core population revealed by Herschel
• The Spitzer Gould Belt Survey of Large Nearby Interstellar Clouds: Discovery of a Dense Embedded Cluster in the Serpens-Aquila Rift
• Irradiated Herbig-Haro Jets in the Orion Nebula and Near NGC 1333
• The Herschel first look at protostars in the Aquila Rift
• Image-Processing Techniques for the Creation of Presentation-Quality Astronomical Images
• An Association in the Aquila Star-Forming Region: High Resolution Infrared Spectroscopy of T Tauri Stars
• A Subarcsecond Companion to the T Tauri Star AS 353B

Cited by in corpus (1)

• Local Molecular Gas toward the Aquila Rift Region