SINFONI in the Galactic Center: young stars and IR flares in the central light month

Details SINFONI in the Galactic Center: young stars and IR flares in the central light month SINFONI in the Galactic Center: young stars and IR flares in the central light month

2005-02-06

arxiv.org/abs/astro-ph/0502129v1

Astrophys.J. 628 (2005) 246-259

Astronomy and Astrophysics

Astrophysics

50 pages, 10 figures, 2 tables, submitted to ApJ, February 6th, 2005, abstract abridged

Scientific paper

10.1086/430667

We report 75 milli-arcsec resolution, near-IR imaging spectroscopy within the central 30 light days of the Galactic Center [...]. To a limiting magnitude of K~16, 9 of 10 stars in the central 0.4 arcsec, and 13 of 17 stars out to 0.7 arcsec from the central black hole have spectral properties of B0-B9, main sequence stars. [...] all brighter early type stars have normal rotation velocities, similar to solar neighborhood stars. We [...] derive improved 3d stellar orbits for six of these S-stars in the central 0.5 arcsec. Their orientations in space appear random. Their orbital planes are not co-aligned with those of the two disks of massive young stars 1-10 arcsec from SgrA*. We can thus exclude [...] that the S-stars as a group inhabit the inner regions of these disks. They also cannot have been located/formed in these disks [...]. [...] we conclude that the S-stars were most likely brought into the central light month by strong individual scattering events. The updated estimate of distance to the Galactic center from the S2 orbit fit is Ro = 7.62 +/- 0.32 kpc, resulting in a central mass value of 3.61 +/- 0.32 x 10^6 Msun. We happened to catch two smaller flaring events from SgrA* [...]. The 1.7-2.45 mum spectral energy distributions of these flares are fit by a featureless, red power law [...]. The observed spectral slope is in good agreement with synchrotron models in which the infrared emission comes from [...] radiative inefficient accretion flow in the central R~10 Rs region.

Affiliated with

Also associated with

No associations

Rating

SINFONI in the Galactic Center: young stars and IR flares in the central light month does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with SINFONI in the Galactic Center: young stars and IR flares in the central light month, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and SINFONI in the Galactic Center: young stars and IR flares in the central light month will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-128736