CDROM/APJ/V484/P394 AX Monocerotis (Elias+ 1997) ================================================================================ New Perspectives on AX Monocerotis Nicholas M. Elias II, R.E. Wilson, Edward C. Olson, Jason P. Aufdenberg, Edward F. Guinan, Manual Guedel, Walter V. van Hamme, and Heather L. Stevens <1997, ApJ, 484, 394> =1997ApJ...484..394E ================================================================================ Abstract: AX Monocerotis is a 232 d, noneclipsing, interacting binary star that consists of a K giant, a Be-like giant, and a large amounts of circumstellar material. The K star is almost certainly a synchronous rotator and is probably in contact with its critical lobe. The Be star was believed to be a rapid rotator based on extremely wide absorption lines, but new spectra show that these lines arise from the circumstellar environment. Hydrogen emission, also circumstellar, is many times stronger than the continuum. Near-ultraviolet light curves exhibit a 0.5 mag dip near phase 0.75, but there is no such variability at longer wavelengths. Gas flow trajectories from the cusp of the K star roward the Be star provide a simple explanation for the photometric and spectroscopic behavior. We may have found a decreasing orbital period, but more data are necessary to confirm this result. We present several models for AX Mon based on (1) new and archival visible photometry, (2) archival ultraviolet spectroscopy, (3) new and archival visible spectroscopy, (4) new visible polarimetry, and (5) new radio photometry. Further observations, including optical interferometry, are proposed. Keywords: binaries: spectroscopic -- circumstellar matter -- radio continuum: stars -- stars: emission-line, Be -- stars: individual (AX Monocerotis) -- ultraviolet: stars Description: The data, as delivered by the authors, had file names that did not conform to the ISO 9660 Standard, Interchange Level 1, for CD-ROMs. The files were renamed, and placed into a series of subdirectories in order to preserve the information in the file names. The new file names are presented below using UNIX-style directory notation. File Summary: -------------------------------------------------------------------------------- File Name Lrecl Records Explanations -------------------------------------------------------------------------------- photo/efg_hn.dat 22 299 H-alpha (narrow) photometry (EFG) photo/efg_hw.dat 22 357 H-alpha (wide) photometry (EFG) photo/efg_b.dat 22 299 Stromgren b photometry (EFG) photo/efg_u.dat 22 302 Stromgren u photometry (EFG) photo/efg_v.dat 22 301 Stromgren v photometry (EFG) photo/efg_y.dat 22 298 Stromgren y photometry (EFG) photo/mk_b.dat 19 207 Johnson B photometry (MK) photo/mk_u.dat 19 207 Johnson U photometry (MK) photo/mk_v.dat 19 207 Johnson V photometry (MK) polar/nme_b.dat 55 24 Blue polarimetry (NME) polar/nme_g.dat 55 25 Green polarimetry (NME) polar/nme_r.dat 55 23 Red polarimetry (NME)- radvel/apckmjpa.dat 33 34 Star 2 radial velocities spec/eco/93_12_28/656.dat 21 858 Spec. (638-672 nm), 1993/12/28 (ECO) spec/eco/94_01_01/448.dat 21 856 Spec. (439-456 nm), 1994/01/01 (ECO) spec/eco/94_01_01/777.dat 21 664 Spec. (769-796 nm), 1994/01/01 (ECO) spec/eco/94_01_03/594.dat 21 839 Spec. (577-610 nm), 1994/01/03 (ECO) spec/jpa/93_11_18/545.dat 22 1148 Spec. (541-548 nm), 1993/11/18 (JPA) spec/jpa/93_11_18/558.dat 22 1149 Spec. (555-561 nm), 1993/11/18 (JPA) spec/jpa/93_11_18/573.dat 22 1149 Spec. (569-576 nm), 1993/11/18 (JPA) spec/jpa/93_11_18/587.dat 22 1149 Spec. (584-591 nm), 1993/11/18 (JPA) spec/jpa/93_11_18/604.dat 22 1149 Spec. (600-607 nm), 1993/11/18 (JPA) spec/jpa/93_11_18/620.dat 22 1148 Spec. (616-623 nm), 1993/11/18 (JPA) spec/jpa/93_11_18/638.dat 22 1148 Spec. (634-641 nm), 1993/11/18 (JPA) spec/jpa/93_11_18/656.dat 22 1148 Spec. (653-660 nm), 1993/11/18 (JPA) spec/jpa/93_11_18/677.dat 22 1149 Spec. (673-680 nm), 1993/11/18 (JPA) spec/jpa/93_12_01/545.dat 22 1148 Spec. (541-548 nm), 1993/12/01 (JPA) spec/jpa/93_12_01/558.dat 22 1148 Spec. (555-561 nm), 1993/12/01 (JPA) spec/jpa/93_12_01/573.dat 22 1148 Spec. (569-576 nm), 1993/12/01 (JPA) spec/jpa/93_12_01/587.dat 22 1148 Spec. (584-591 nm), 1993/12/01 (JPA) spec/jpa/93_12_01/604.dat 22 1149 Spec. (600-607 nm), 1993/12/01 (JPA) spec/jpa/93_12_01/620.dat 22 1148 Spec. (616-623 nm), 1993/12/01 (JPA) spec/jpa/93_12_01/638.dat 22 1149 Spec. (634-641 nm), 1993/12/01 (JPA) spec/jpa/93_12_01/656.dat 22 1148 Spec. (653-660 nm), 1993/12/01 (JPA) spec/jpa/93_12_01/677.dat 22 1148 Spec. (673-680 nm), 1993/12/01 (JPA) spec/jpa/94_02_27/545.dat 22 1149 Spec. (541-548 nm), 1993/02/27 (JPA) spec/jpa/94_02_27/558.dat 22 1148 Spec. (555-561 nm), 1993/02/27 (JPA) spec/jpa/94_02_27/573.dat 22 1149 Spec. (569-576 nm), 1993/02/27 (JPA) spec/jpa/94_02_27/587.dat 22 1149 Spec. (584-591 nm), 1993/02/27 (JPA) spec/jpa/94_02_27/604.dat 22 1149 Spec. (600-607 nm), 1993/02/27 (JPA) spec/jpa/94_02_27/620.dat 22 1148 Spec. (616-623 nm), 1993/02/27 (JPA) spec/jpa/94_02_27/638.dat 22 1149 Spec. (634-641 nm), 1993/02/27 (JPA) spec/jpa/94_02_27/656.dat 22 1150 Spec. (653-660 nm), 1993/02/27 (JPA) spec/jpa/94_02_27/677.dat 22 1149 Spec. (673-680 nm), 1993/02/27 (JPA) -------------------------------------------------------------------------------- Byte-by-byte Description of file: photo/efg_hn.dat photo/efg_hw.dat photo/efg_b.dat photo/efg_u.dat photo/efg_v.dat photo/efg_y.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1-13 D13.5 JD HJD Heliocentric Julian Date 14-22 F9.4 mag dMag *Magnitude difference -------------------------------------------------------------------------------- Notes for file: photo/efg_hn.dat photo/efg_hw.dat photo/efg_b.dat photo/efg_u.dat photo/efg_v.dat photo/efg_y.dat -------------------------------------------------------------------------------- dMag: Magnitude difference in the sense variable minus comparison. The comparison star was HD 46966 (BD +06 1301). -------------------------------------------------------------------------------- Byte-by-byte Description of file: photo/mk_b.dat photo/mk_u.dat photo/mk_v.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1-11 D11.3 JD HJD Heliocentric Julian Date 12-19 F8.3 mag dMag *Magnitude difference -------------------------------------------------------------------------------- Notes for file: photo/mk_b.dat photo/mk_u.dat photo/mk_V.dat -------------------------------------------------------------------------------- dMag: Magnitude difference in the sense variable minus comparison. The comparison star was HD 46966 (BD +06 1301). -------------------------------------------------------------------------------- Byte-by-byte Description of file: polar/nme_b.dat polar/nme_g.dat polar/nme_r.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1-11 D11.3 JD HJD Heliocentric Julian Date 12-18 F7.2 --- q Stokes q value 19-25 F7.2 --- e_q Error in q 26-33 F8.2 --- u Stokes u value 34-40 F7.2 --- e_u Error in u 41-48 F8.2 --- v Stokes v value 49-55 F7.2 --- e_v Error in v -------------------------------------------------------------------------------- Byte-by-byte Description of file: radvel/apckmjpa.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1-11 D11.3 JD HJD Heliocentric Julian Date 12-21 F10.2 km/s vsini v2 sin i 22-29 F8.3 --- RW *Relative weight 30-33 I4 --- Obs *Observer -------------------------------------------------------------------------------- Notes for file: radvel/apckmjpa.dat -------------------------------------------------------------------------------- RW: For Cowley and Mastenova, the weights are based on the variances of the individual data sets, and for the authors' data they are based on the cross-correlation fit variances. Obs: 1 = Cowley, A.P. 1964, ApJ, 139, 817 2 = Mastenova, K. 1989, Bull. Astron. Inst. Czechoslovakia, 40, 118 3 = Aufdenberg, J.P. this work -------------------------------------------------------------------------------- Byte-by-byte Description of file: spec/eco/*/* -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 7 F7.3 nm Lambda Wavelength 8-21 E14.4 --- Flux Flux normalized to estimated continuum -------------------------------------------------------------------------------- Byte-by-byte Description of file: spec/jpa/*/* -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 8 F8.4 nm Lambda Wavelength 9-22 E14.4 --- Flux Flux normalized to estimated continuum -------------------------------------------------------------------------------- ================================================================================ (End) Lee E. Brotzman [ADS] 24-Jul-97