Neutral Hydrogen Absorption Toward XTE J1810-197: the Distance to a Radio-Emitting Magnetar

Abstract

We have used the Green Bank Telescope to measure HI absorption against the anomalous X-ray pulsar XTE J1810-197. Assuming a flat rotation curve, we find that XTE J1810-197 is located at a distance of 3.4(+0.5,-0.7) kpc. For a rotation curve that incorporates a model of the Galactic bar, we obtain a distance of 4.0(+0.3,-0.8) kpc. Using a rotation curve that incorporates a model of the Galactic bar and the spiral arms of the Galaxy, the distance is 3.7(+/-0.6) kpc. These values are consistent with the distance to XTE J1810-197 of about 3.3 kpc derived from its dispersion measure, and estimates of 2-5 kpc obtained from fits to its X-ray spectra. Overall, we determine that XTE J1810-197 is located at a distance of 3.5(+/-0.5) kpc, possibly not far in front of the infrared dark cloud G10.74-0.13. We also used the GBT in an attempt to measure absorption in the OH 1612, 1665, 1667, and 1720 MHz lines against XTE J1810-197. We were unsuccessful in this, mainly because of its declining radio flux density. Analysis of HI 21 cm, OH, and CO(2-1) emission toward XTE J1810-197 allows us to place a lower limit of $N_{\rm H} \ga 4.6 \times 10^{21}$ cm${}^{-2}$ on the non-ionized hydrogen column density to \magnetar, consistent with estimates obtained from fits to its X-ray spectra.

arXiv comment35 pages, 11 figures, 5 Tables Submitted to ApJ

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Cited by in corpus (26)

• The McGill Magnetar Catalog
• On Pulsar Distance Measurements and their Uncertainties
• Microarcsecond VLBI pulsar astrometry with PSR$\pi$ II. parallax distances for 57 pulsars
• Radio disappearance of the magnetar XTE J1810-197 and continued X-ray timing
• Constraints on the Emission and Viewing Geometry of the Transient Anomalous X-ray Pulsar XTE J1810-197
• G11.2-0.3: The Young Remnant of a Stripped-Envelope Supernova
• Emission geometry, radiation pattern, and magnetic topology of the magnetar XTE J1810-197 in its quiescent state
• The 2018 X-ray and Radio Outburst of Magnetar XTE J1810-197
• The variable spin-down rate of the transient magnetar XTE J1810--197
• A magnetar parallax
• Evolution of the X-ray Properties of the Transient Magnetar XTE J1810-197
• Galactic and cosmological fast radio bursts as scaled-up solar radio bursts
• GeV emission in the region of HESS J1809-193 and HESS J1813-178: is HESS J1809-193 a proton pevatron?
• Long-term evolution of anomalous X-ray pulsars and soft gamma repeaters
• The 11 years of low-activity of the magnetar XTE J1810-197
• Detection of the magnetar XTE J1810-197 at 150 and 260 GHz with the NIKA2 Kinetic Inductance Detector camera
• Electron Distribution in the Galactic Disk - Results From a Non-Equilibrium Ionization Model of the ISM
• Axion Constraints from Quiescent Soft Gamma-ray Emission from Magnetars
• Coherent radio emission from a twisted magnetosphere after magnetar-quake
• Searching for Magnetar Binaries Disrupted by Core-Collapse Supernovae
• Detection of OH absorption against PSR B1718-35
• Bright X-ray and Radio Pulses from a Recently Reactivated Magnetar
• Revealing Hidden Variability in PWNe With Spectral Index Maps
• ALMA discovery of Punctum -- a highly polarized mm source in nuclear starburst galaxy NGC 4945
• Correlation of Burst Behaviour with Magnetar Age
• Characterizing Pulsar Distances Using HI Kinematics