1998A&A...332L..37M

Query : 1998A&A...332L..37M

1998A&A...332L..37M - Astronomy and Astrophysics, volume 332, L37-40 (1998/4-3)

HST/FOC observations confirm the presence of a spectral feature in the optical spectrum of Geminga.

MIGNANI R.P., CARAVEO P.A. and BIGNAMI G.F.

Abstract (from CDS):

New optical and near-UV HST observations of Geminga are presented. When compared with previous ground-based and HST imaging, the data confirm and better define the presence of an emission feature centered at ∼6,000Å and superimposed on the thermal continuum best fitting the extreme-UV/soft X-ray data. This feature may be interpreted in terms of cyclotron emission originated from a mixture of H/He ions in the neutron star's atmosphere. In the case of pure Hydrogen, the feature wavelength would imply a magnetic field of order 3-5x1011G, consistent with the value deduced from the dynamical parameters of the pulsar. If due to cyclotron emission, the observation of this feature would represent the first case of an in situ measurement of the surface magnetic field of an isolated neutron star.

Abstract Copyright: ∼

Journal keyword(s): optical, pulsar Geminga

Simbad objects: 10

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Number of rows : 10
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 M 1 SNR 05 34 30.9 +22 00 53           ~ 6190 1
2 V* CM Tau Psr 05 34 31.9474694616 +22 00 52.153698024           ~ 5256 0
3 PSR B0540-69 Psr 05 40 11.2000490438 -69 19 54.198559829           ~ 904 3
4 NAME Geminga Psr 06 33 54.153 +17 46 12.91           ~ 1221 0
5 PSR B0656+14 Psr 06 59 48.1960 +14 14 19.400   24.85 24.90     ~ 869 1
6 NAME Vela Pulsar Psr 08 35 20.65525 -45 10 35.1545     15.10     ~ 2314 1
7 PSR B0950+08 Psr 09 53 09.2970 +07 55 36.400           ~ 755 2
8 PSR B1055-52 Psr 10 57 59.0450 -52 26 56.330           ~ 725 0
9 PSR B1509-58 Psr 15 13 55.52 -59 08 08.8     13.06     ~ 844 1
10 PSR B1929+10 Psr 19 32 14.0570 +10 59 33.380           ~ 753 0

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