TY - JOUR
T1 - A magnetospheric heating model for the evaporation of the companion to PSR 1957 + 20
AU - Eichler, David
N1 - Funding Information:
I gratefully acknowledge helpful conversations with Drs P. Israelovich, A. Dessler, A. Eviatar, C. Michel and A. Levin- son. I especially thank Curt Michel for a critical reading of the manuscript. This research was supported in part by an Israel-US Binational Science Foundation grant. I acknowledge the hospitality of the Institute for Theoretical Physics at the University of California, Santa Barbara, which is supported by NSF grant PHY89-04035, during the completion of this paper, the hospitality of the organizers, Drs E. van den Heuvel and S. Rappaport, and many stimulating discussions with the participants of the programme on neutron stars.
Publisher Copyright:
© Royal Astronomical Society.
PY - 1992/1/1
Y1 - 1992/1/1
N2 - An orbital period derivative for the PSR 1957 + 20 system has recently been reported by Ryba & Taylor which indicates orbital contraction over a time-scale of 1015s. The angular momentum loss of the light companion is probably indicative of heavy mass loss, too high to be explained by previous evaporation scenarios. In addition, Fruchter & Goss have reported an eclipse in the time-integrated component of the pulsar emission at 1400 MHz at a phase of 0.23 to 0.24, slightly before the middle of the eclipse at lower frequencies, implying that the wind is shot out asymmetrically from the companion star's surface. In this letter we suggest that the companion has a magnetos-phere which allows for extremely efficient and possibly uneven heating of the companion's surface, and partial collimation of the outflow.
AB - An orbital period derivative for the PSR 1957 + 20 system has recently been reported by Ryba & Taylor which indicates orbital contraction over a time-scale of 1015s. The angular momentum loss of the light companion is probably indicative of heavy mass loss, too high to be explained by previous evaporation scenarios. In addition, Fruchter & Goss have reported an eclipse in the time-integrated component of the pulsar emission at 1400 MHz at a phase of 0.23 to 0.24, slightly before the middle of the eclipse at lower frequencies, implying that the wind is shot out asymmetrically from the companion star's surface. In this letter we suggest that the companion has a magnetos-phere which allows for extremely efficient and possibly uneven heating of the companion's surface, and partial collimation of the outflow.
UR - http://www.scopus.com/inward/record.url?scp=84967832387&partnerID=8YFLogxK
U2 - 10.1093/mnras/254.1.11P
DO - 10.1093/mnras/254.1.11P
M3 - Article
AN - SCOPUS:84967832387
SN - 0035-8711
VL - 254
SP - 11P-13P
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 1
ER -