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Sagittarius B1 -- A Patchwork of H II Regions and PhotoDissociation Regions
Janet P. Simpson, Sean W. J. Colgan, Angela S. Cotera +2
Sgr B1 is a luminous H II region in the Galactic Center immediately next to the massive star-forming giant molecular cloud Sgr B2 and apparently connected to it from their similar…
SOFIA FIFI-LS Observations of Sgr B1: Ionization Structure and Sources of Excitation
Janet P. Simpson, Sean W. J. Colgan, Angela S. Cotera +2
The current paradigm of Galactic Center (GC) gas motions and star formation envisions sequential star formation in streams of gas as they pass near the supermassive black hole, Sgr…
Surface Brightness Profile of the Milky Way's Nuclear Star Cluster
R. Schodel, A. Feldmeier, D. Kunneriath +4
(abridged) In this paper we aim at determining the shape, size, and luminosity/mass of the Milky Way Nuclear Star Cluster (MWNSC). We use Spitzer/IRAC images at 3.6 and 4.5 microme…
HST Paschen-alpha Survey of the Galactic Center: Data Reduction and Products
H. Dong, Q. D. Wang, A. Cotera +7
Our HST/NICMOS Pa survey of the Galactic center (GC) provides a uniform, panoramic, high-resolution map of stars and ionized diffuse gas in the central 416 arcmin^2 of the Galaxy.…
Massive Young Stellar Objects in the Galactic Center. I. Spectroscopic Identification from Spitzer/IRS Observations
Deokkeun An, Solange V. Ramírez, Kris Sellgren +7
We present results from our spectroscopic study, using the Infrared Spectrograph (IRS) onboard the Spitzer Space Telescope, designed to identify massive young stellar objects (YSOs…
Properties of the Compact HII Region Complex G-0.02-0.07
Elisabeth Mills, Mark R. Morris, Cornelia Lang +4
We present new extinction maps and high-resolution Paschen alpha images of G-0.02-0.07, a complex of compact HII regions located adjacent to the M-0.02-0.07 giant molecular cloud,…
Discovery of a Luminous Blue Variable with an Ejection Nebula Near the Quintuplet Cluster
Jon C. Mauerhan, Mark R. Morris, Angela S. Cotera +5
We report on the discovery of a luminous blue variable (LBV) lying ~7 pc in projection from the Quintuplet cluster. This source, which we call LBV G0.120-0.048, was selected for sp…
HST Palpha Survey of the Galactic Center -- Searching the missing young stellar populations within the Galactic Center
H. Dong, Q. D. Wang, A. Cotera +6
We present preliminary results of our \hst Pa survey of the Galactic Center (\gc), which maps the central 0.650.25 degrees around Sgr A*. This survey provides us with a…
Extinction toward the Compact HII Regions G-0.02-0.07
E. A. Mills, M. R. Morris, C. C. Lang +4
The four HII regions in the Sgr A East complex: A, B, C, and D, represent evidence of recent massive star formation in the central ten parsecs. Using Paschen-alpha images taken wit…
Near-infrared counterparts to Chandra X-ray sources toward the Galactic Center. II. Discovery of Wolf-Rayet stars and O supergiants
Jon C. Mauerhan, Michael P. Muno, Mark R. Morris +2
We present new identifications of infrared counterparts to the population of hard X-ray sources near the Galactic center detected by the Chandra X-ray Observatory. We have confirme…
HST/NICMOS Paschen-alpha Survey of the Galactic Center: Overview
Q. D. Wang, H. Dong, A. Cotera +6
We have recently carried out the first wide-field hydrogen Paschen-alpha line imaging survey of the Galactic Center (GC), using the NICMOS instrument aboard the Hubble Space Telesc…
First Spectroscopic Identification of Massive Young Stellar Objects in the Galactic Center
Deokkeun An, Solange V. Ramírez, Kris Sellgren +7
We report the detection of several molecular gas-phase and ice absorption features in three photometrically-selected young stellar object (YSO) candidates in the central 280 pc of…
Star Formation in the Central 400 pc of the Milky Way: Evidence for a Population of Massive YSOs
F. Yusef-Zadeh, J. W. Hewitt, R. G. Arendt +8
The central kpc of the Milky Way might be expected to differ significantly from the rest of the Galaxy with regard to gas dynamics and the formation of YSOs. We probe this possibil…