Publications (10)
Herschel/HIFI observations of a new interstellar water maser: the 5(32)-4(41) transition at 620.701 GHz
David A. Neufeld, Yuanwei Wu, Alex Kraus +4
Using the Herschel Space Observatory's Heterodyne Instrument for the Far-Infrared (HIFI), we have performed mapping observations of the 620.701 GHz 5(32)-4(41) transition of ortho-…
Herschel observations of interstellar chloronium
David A. Neufeld, Evelyne Roueff, Ronald L. Snell +21
Using the Herschel Space Observatory's Heterodyne Instrument for the Far-Infrared (HIFI), we have observed para-chloronium (H2Cl+) toward six sources in the Galaxy. We detected int…
Spatially extended OH+ emission from the Orion Bar and Ridge
Floris van der Tak, Zsofia Nagy, Volker Ossenkopf +5
We report the first detection of a Galactic source of OH+ line emission: the Orion Bar, a bright nearby photon-dominated region. Line emission is detected over ~1' (0.12 pc), traci…
Characterizing the Youngest Herschel-detected Protostars II. Molecular Outflows from the Millimeter and the Far-infrared
John J. Tobin, Amelia M. Stutz, P. Manoj +7
We present CARMA CO (J=1-0) observations and Herschel PACS spectroscopy, characterizing the outflow properties toward extremely young and deeply embedded protostars in the Orion mo…
APEX-CHAMP+ high-J CO observations of low-mass young stellar objects: IV. Mechanical and radiative feedback
Umut A. Yıldız, Lars E. Kristensen, Ewine F. van Dishoeck +14
During the embedded stage of star formation, bipolar molecular outflows and UV radiation from the protostar are important feedback processes. Our aim is to quantify the feedback, m…
Herschel/HIFI Spectral Mapping of C, CH, and CH in Orion BN/KL: The Prevailing Role of Ultraviolet Irradiation in CH Formation
Patrick W. Morris, Harshal Gupta, Zsofia Nagy +8
The CH ion is a key species in the initial steps of interstellar carbon chemistry. Its formation in diverse environments where it is observed is not well understood, however, b…
Herschel Measurements of Molecular Oxygen in Orion
Paul F. Goldsmith, Rene Liseau, Tom A. Bell +31
We report observations of three rotational transitions of molecular oxygen (O2) in emission from the H2 Peak 1 position of vibrationally excited molecular hydrogen in Orion. We obs…
The Enigma of Gaia18cjb: a Rare Hybrid of FUor and EXor?
Eleonora Fiorellino, Peter Abraham, Agnes Kospal +28
Context. Gaia18cjb is one of the Gaia-alerted eruptive young star candidates which has been experiencing a slow and strong brightening during the last 13 years, similar to some FU…
Spectroscopic follow-up of Gaia alerted Young Stellar Object variables: the Large Binocular Telescope view
Teresa Giannini, Manuele Gangi, Fernando Cruz-Saenz de Miera +13
We analyzed optical/near-IR Large Binocular Telescope spectra of 16 sources alerted by Gaia between 2021 and 2024 due to significant photometric variability. Half of the spectra we…
An HST Survey of Protostellar Outflow Cavities: Does Feedback Clear Envelopes?
Nolan M. Habel, S. Thomas Megeath, Joseph Jon Booker +10
We study protostellar envelope and outflow evolution using Hubble Space Telescope NICMOS or WFC3 images of 304 protostars in the Orion Molecular clouds. These near-IR images resolv…