The nature of the Galactic Center source IRS 13 revealed by high spatial resolution in the infrared

Abstract

High spatial resolution observations in the 1 to 3.5 micron region of the Galactic Center source known historically as IRS 13 are presented. They include ground-based adaptive optics images in the H, Kp (2.12/0.4 micron) and L bands, NICMOS data in filters between 1.1 and 2.2 micron, and integral field spectroscopic data from BEAR, an Imaging FTS, in the HeI 2.06 micron and the Br$\gamma$ line regions. Analysis of all these data provides a completely new picture of the main component, IRS 13E, which appears as a cluster of seven individual stars within a projected diameter of ~0.5'' (0.02 pc). The brightest sources, 13E1, 13E2, 13E3 (a binary), and 13E4, are all massive stars, 13E1 a blue object, with no detected emission line while 13E2 and 13E4 are high-mass emission line stars. 13E2 is at the WR stage and 13E4 a massive O-type star. 13E3A and B are extremely red objects, proposed as other examples of dusty WR stars. All these sources have a common westward proper motion. 13E5, is a red source similar to 13E3A/B. This concentration of comoving massive hot stars, IRS 13E, is proposed as the remaining core of a massive star cluster, which could harbor an intermediate-mass black hole (IMBH) of ~1300 M_sol. This detection plays in favor of a scenario in which the helium stars and the other hot stars in the central pc originate from the stripping of a massive cluster formed several tens of pc from the center. The detection of a discrete X-ray emission (Baganoff et al. 2003) at the IRS~13 position is examined in this context.

14 pages, 6 figures (3 in color), LaTeX2e, accepted in A&A

References in corpus (18)

• Chandra X-ray Spectroscopic Imaging of Sgr A* and the Central Parsec of the Galaxy
• The runaway growth of intermediate-mass black holes in dense star clusters
• Analysis of isoplanatic high resolution stellar fields by Starfinder code
• HST/NICMOS Observations of Massive Stellar Clusters Near the Galactic Center
• The Galactic Center He I Stars: Remains of a Dissolved Young Cluster?
• Deconvolution with correct sampling
• A Deep Chandra Catalog of X-ray Point Sources toward the Galactic Center
• The need for a second black hole at the Galactic center
• JHKL Photometry and the K-band Luminosity Function at the Galactic Center
• HST Paschen alpha and 1.9 micron imaging of Sgr A West
• Dynamical Friction on Star Clusters near the Galactic Center
• New Results on the Helium Stars in the Galactic Center Using BEAR Spectro-Imagery
• The fate of star clusters near the Galactic center I: Analytic considerations
• Spatially Resolved Observations of the Galactic Center Source, IRS 21
• Adaptive Optics Near-Infrared Spectroscopy of the Sgr A* Cluster
• Cold H2O and CO ice and gas toward the Galactic Center
• The Position of Sgr A${}^{\ast }$ at the Galactic Center
• The Galactic Centre Source IRS 13E: a Post-LBV Wolf-Rayet Colliding Wind Binary?

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