The Distance of the Soft Gamma Repeater SGR 1806-20
arXiv:astro-ph/9612191 · doi:10.1086/303807
Abstract
We present CO(J=1-0) observations in the direction of the Soft Gamma Repeater SGR 1806-20 with the SEST telescope. We detected several molecular clouds, and we discuss in this paper the implications of these observations for the distance to the X-ray counterpart AX 1805.7-2025, the supernova remnant G10.0-0.3 and the very luminous O9-B2 star detected in the line of sight. The distance of SGR 1806-20 is estimated to be 14.5 +/- 1.4 kpc and this Soft Gamma Repeater is very likely associated with one of the brightest HII regions in the Galaxy, W31. The large size of G10.0-0.3 (25 x 38 pc) for a young supernova remnant possibly powered by a central pulsar (AX 1805.7-2025) indicates that G10.0-0.3 could be expanding in the very low density region produced by the wind of the blue star.
20 pages, four postscript figures, LaTeX. To appear in Astrophysical Journal, 1997, in press
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- Discovery of a Radio Source following the 27 December 2004 Giant Flare from SGR 1806-20
- A downward revision to the distance of the 1806-20 cluster and associated magnetar from Gemini near-Infrared spectroscopy
- Magnetar outbursts: an observational review
- A Comprehensive Study of the X-ray Bursts from the Magnetar Candidate 1E 2259+586
- Discovery of Cyclotron Resonance Features in the Soft Gamma Repeater SGR 1806-20
- The Central X-Ray Point Source in Cassiopeia A
- ATLASGAL - Kinematic distances and the dense gas mass distribution of the inner Galaxy
- Nature vs. Nurture: The Origin of Soft Gamma-ray Repeaters and Anomalous X-ray Pulsars
- Resolution of Distance Ambiguities of Inner Galaxy Massive Star Formation Regions II
- Temporal and Spectral Characteristics of Short Bursts from the Soft Gamma Repeaters 1806-20 and 1900+14
- The Connection between W31, SGR 1806-20, & LBV 1806-20: Distance, Extinction, and Structure
- The Distance to the Soft Gamma Repeater SGR 1627-41
- SGR giant flares in the BATSE short GRB catalogue: constraints from spectroscopy
- A new analysis of the short-duration, hard-spectrum GRB 051103, a possible extragalactic SGR giant flare
- On the optical extinction and distance of GRS 1915+105
- Infrared Observations of the Candidate LBV 1806-20 & Nearby Cluster Stars
- Precise Localization of the Soft Gamma Repeater SGR 1627-41 and the Anomalous X-ray Pulsar AXP 1E1841-045 with Chandra
- The Giant Flare of December 27, 2004 from SGR 1806-20
- A Comprehensive Study of Short Bursts from SGR 1806-20 and SGR 1900+14 Detected by HETE-2
- Constraints on the distance to SGR 1806-20 from HI absorption
- Precise Chandra Localization of the Soft Gamma-ray Repeater SGR 1806-20
- Where is SGR1806-20?
- SGR 1806-20 about two years after the giant flare: Suzaku, XMM-Newton and INTEGRAL observations
- Massive Star Forming Regions in the Galaxy using the Spitzer GLIMPSE Survey
- Neutral Hydrogen Absorption Toward XTE J1810-197: the Distance to a Radio-Emitting Magnetar
- Influence of an Internal Magnetar on Supernova Remnant Expansion
- Suzaku Observations of SGR 1900+14 and SGR 1806-20
- Interaction between Ionized and Molecular Gas in the Active Star-Forming Region W31
- Possible Infrared Counterparts to the Soft Gamma-Ray Repeater SGR 1806-20
- Star formation around the mid-infrared bubble CN 148
- Limits on the high-energy gamma and neutrino fluxes from the SGR 1806-20 giant flare of December 27th, 2004 with the AMANDA-II detector
- Unraveling the observational signatures of cloud-cloud collision and hub-filament systems in W31
- SGR 1806-20 Is a Set of Independent Relaxation Systems
- High-mass star formation at high luminosities: W31 at >10^6 L_sun
- Constraining HeII Reionization Detection Uncertainties via Fast Radio Bursts
- On Period and Burst Histories of AXPs and SGRs and the Possible Evolution of these Objects on the P-Pdot Diagram
- The Giant Flare from SGR 1806-20 and its Radio Afterglow
- Mid-infrared VISIR and Spitzer observations of the surroundings of the magnetar SGR 1806-20
- VVV analysis of star clusters towards the W31 star-forming complex
- Contamination of short GRBs by giant magnetar flares: Significance of downward revision in distance to SGR 1806-20