High-resolution Near-infrared Spectroscopy of Diffuse Sources around MWC 1080
Journal Article
·
· The Astronomical Journal (Online)
- Korea Astronomy and Space Science Institute, Daejeon, 34055 (Korea, Republic of)
- Subaru Telescope, National Astronomical Observatory of Japan, National Institutes of Natural Sciences (NINS), 650 North A’ohoku Place, Hilo, HI 96720 (United States)
To reveal the origins of diffuse Hα emissions observed around the Herbig star MWC 1080, we have performed a high-resolution near-infrared (NIR) spectroscopic observation using the Immersion Grating Infrared Spectrograph. In the NIR H and K bands, we detected various emission lines (six hydrogen Brackett lines, seven H{sub 2} lines, and an [Fe ii] line) and compared their spatial locations with the optical (Hα and [S ii]) and radio ({sup 13}CO and CS) line maps. The shock-induced H{sub 2} and [Fe ii] lines indicate the presence of multiple outflows, consisting of at least three associated young stars in this region. The kinematics of H{sub 2} and [Fe ii] near the northeast (NE) cavity edge supports the idea that the NE main outflow from MWC 1080A is the blueshifted one with a low inclination angle. The H{sub 2} and [Fe ii] lines near the southeast molecular region newly reveal that additional highly blueshifted outflows originate from other young stars. The fluorescent H{sub 2} lines were found to trace photodissociation regions formed on the cylindrical surfaces of the main outflow cavity, which are expanding outward with a velocity of about 10–15 km s{sup −1}. For the Hα emission, we identify its components associated with two stellar outflows and two young stars in addition to the dominant component of MWC 1080A scattered by dust. We also report a few faint Hα features located ∼0.4 pc away in the southwest direction from MWC 1080A, which lie near the axes of the NE main outflow and one of the newly identified outflows.
- OSTI ID:
- 23159276
- Journal Information:
- The Astronomical Journal (Online), Journal Name: The Astronomical Journal (Online) Journal Issue: 1 Vol. 162; ISSN 1538-3881
- Country of Publication:
- United States
- Language:
- English
Similar Records
The immediate environments of two Herbig Be stars: MWC 1080 and HD 259431
CO AND H{sup +}{sub 3} TOWARD MWC 1080, MWC 349, AND LkH{alpha} 101
Inner Warm Disk of ESO Hα 279a Revealed by NA i and CO Overtone Emission Lines
Journal Article
·
Sun Nov 30 23:00:00 EST 2014
· Astrophysical Journal
·
OSTI ID:22370184
CO AND H{sup +}{sub 3} TOWARD MWC 1080, MWC 349, AND LkH{alpha} 101
Journal Article
·
Tue Jun 01 00:00:00 EDT 2010
· Astrophysical Journal
·
OSTI ID:21450938
Inner Warm Disk of ESO Hα 279a Revealed by NA i and CO Overtone Emission Lines
Journal Article
·
Thu Jul 20 00:00:00 EDT 2017
· Astrophysical Journal
·
OSTI ID:22876017