NOVA-V2214 OPHIUCHI 1988 - A MAGNETIC NOVA INSIDE THE PERIOD GAP

被引:20
作者
BAPTISTA, R
JABLONSKI, FJ
CIESLINSKI, D
STEINER, JE
机构
[1] INST NACL PESQUISAS ESPACIAIS,DIV ASTROFIS,BR-12201 S JOSE CAMPO,SP,BRAZIL
[2] UNIV SAO PAULO,INST ASTRON & GEOFIS,BR-01065 SAO PAULO,BRAZIL
关键词
BINARIES; CLOSE; NOVAE; CATACLYSMIC VARIABLES; STARS; INDIVIDUAL; (V2214; OPHIUCHI); MAGNETIC FIELDS;
D O I
10.1086/186788
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We have discovered a coherent photometric modulation in Nova Oph 1988 with period 0.117515 +/- 0.000002 d (2.82 hr) which we associate to the orbital period of the underlying binary. This places the system at the upper side of the gap of the cataclysmic variables' (CVs) period distribution. The striking similarity of the orbital light curve with that of AM Her and the presence of prominent He II lines in the optical spectrum-similar to the magnetic nova candidates V1500 Cyg, GQ Mus, and CP Pup-strongly suggest that this is also a magnetic nova. Inclusion of this object in the statistics of novae raises an interesting scenario. There are presently four novae with known orbital period P(orb) less than or similar 3 hr, half of which lie in the period pp. All these systems are suspected to harbor magnetic white dwarfs. This evidence suggests (1) that there is no period gap for novae, and (2) that magnetic CVs are strongly favored among novae for P(orb) less than or similar 3.3 hr. Implications and support for these conclusions are discussed in the light of thermonuclear runaway models and the hibernation model of classical novae, and of current models to explain the period gap.
引用
收藏
页码:L67 / L70
页数:4
相关论文
共 18 条
[1]   LOW-MASS X-RAY BINARY AM HERCULIS [J].
CRAMPTON, D ;
COWLEY, AP .
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC, 1977, 89 (529) :374-385
[2]   UBVRI PHOTOMETRY OF CP PUPPIS - A MAGNETIC NOVA [J].
DIAZ, MP ;
STEINER, JE .
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC, 1991, 103 (667) :964-968
[3]   THE PHOTOMETRIC PERIOD OF NOVA MUSCAE 1983 [J].
DIAZ, MP ;
STEINER, JE .
ASTROPHYSICAL JOURNAL, 1989, 339 (01) :L41-L43
[4]   TIME DEVELOPMENT OF THE NEAR-INFRARED SPECTRUM OF THE SLOW NOVA V2214-OPHIUCHI (NOVA OPHIUCHI 1988) [J].
ERWIN, P ;
LYNCH, DK ;
RUDY, RJ ;
ROSSANO, GS ;
PUETTER, RC .
ASTRONOMICAL JOURNAL, 1992, 103 (06) :1970-1975
[5]   THE UPPER FIELD-STRENGTH LIMIT IN AM HERCULIS SYSTEMS [J].
HAMEURY, JM ;
KING, AR ;
LASOTA, JP .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1989, 237 (03) :845-852
[6]  
JABLONSKI FJ, 1988, IAU4619 CIRC
[7]   PHOTOMETRY AND SPECTROSCOPY OF A NEWLY DISCOVERED POLAR - NOVA CYGNI-1975 (V1500 CYG) [J].
KALUZNY, J ;
CHLEBOWSKI, T .
ASTROPHYSICAL JOURNAL, 1988, 332 (01) :287-292
[8]   THE NEBULAR PHASE OF NOVA GQ-MUSCAE-1983 - EVOLUTION OF THE IONIZATION OF THE OPTICAL-SPECTRUM [J].
KRAUTTER, J ;
WILLIAMS, RE .
ASTROPHYSICAL JOURNAL, 1989, 341 (02) :968-973
[9]   NOVA OPHIUCHI 1988 - 0.9-1.35-MU-M SPECTROSCOPY 6 MONTHS AFTER DISCOVERY [J].
LYNCH, DK ;
RUDY, RJ ;
ROSSANO, GS ;
ERWIN, P ;
PUETTER, RC .
ASTRONOMICAL JOURNAL, 1989, 98 (05) :1682-1685
[10]  
MCNAUGHT RH, 1988, IAU4582 CIRC