The Next Geminga: Deep Multiwavelength Observations of a Neutron Star Identified with 3EG J1835+5918

Details The Next Geminga: Deep Multiwavelength Observations of a Neutron Star Identified with 3EG J1835+5918 The Next Geminga: Deep Multiwavelength Observations of a Neutron Star Identified with 3EG J1835+5918

2002-05-24

arxiv.org/abs/astro-ph/0205442v1

Astronomy and Astrophysics

Astrophysics

4 pages, 4 figures, accepted for publication in ApJ Letters

Scientific paper

10.1086/341967

We describe Chandra, HST, and radio observations that reveal a radio-quiet but magnetospherically active neutron star in the error circle of the high-energy gamma-ray source 3EG J1835+5918, the brightest of the unidentified EGRET sources at high Galactic latitude. A Chandra ACIS-S spectrum of the ultrasoft X-ray source RX J1836.2+5925, suggested by Mirabal & Halpern as the neutron star counterpart of 3EG J1835+5918, requires two components: a blackbody of T~3x10^5 K and a hard tail that can be parameterized as a power law of photon index Gamma~2. An upper limit of d < 800 pc can be derived from the blackbody fit under an assumption of R = 10 km. Deep optical imaging with the HST STIS CCD failed to detect this source to a limit of V > 28.5, thus f_X/f_V > 6000 and d > 250 pc assuming the X-ray fitted temperature for the full surface. Repeated observations with the 76 m Lovell telescope at Jodrell Bank place an upper limit of < 0.1 mJy on the flux density at 1400 MHz for a pulsar with P > 0.1 s, and < 0.25 mJy for a ~10 ms pulsar at the location of RX J1836.2+5925. All of this evidence points to an older, possibly more distant version of the highly efficient gamma-ray pulsar Geminga, as the origin of the gamma-rays from 3EG J1835+5918.

Affiliated with

Also associated with

No associations

Rating

The Next Geminga: Deep Multiwavelength Observations of a Neutron Star Identified with 3EG J1835+5918 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 The Next Geminga: Deep Multiwavelength Observations of a Neutron Star Identified with 3EG J1835+5918, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Next Geminga: Deep Multiwavelength Observations of a Neutron Star Identified with 3EG J1835+5918 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-361080