2000MNRAS.318....9B

Query : 2000MNRAS.318....9B

2000MNRAS.318....9B - Mon. Not. R. Astron. Soc., 318, 9-17 (2000/October-2)

A TiO study of the dwarf nova IP Pegasi.

BEEKMAN G., SOMERS M., NAYLOR T. and HELLIER C.

Abstract (from CDS):

We present red spectra in the region ~λ7000-8300Å of the eclipsing dwarf nova IP Peg, with simultaneous narrow-band photometry centred at 7322Å. We show that by placing a second star on the slit we can correct for the telluric absorption bands which have hitherto made the TiO features from the secondary star unusable. We use these TiO features to carry out a radial velocity study of the secondary star, and find this gives an improvement in the signal-to-noise ratio of a factor of 2 compared with using the Nai doublet. In contrast with previous results, we find no apparent ellipticity in the radial velocity curve. As a result we revise the semi-amplitude to K2=331.3±5.8km.s–1, and thus the primary and secondary star masses to 1.05–0.07+0.14M☉ and 0.33–0.05+0.14M☉ respectively. Although this is the lowest mass yet derived for the secondary star, it is still overmassive for its observed spectral type. However, the revised mass and radius bring IP Peg into line with other cataclysmic variables in the mass-radius-period relationships.

By fitting the phase-resolved spectra around the TiO bands to a mean spectrum, we attempt to isolate the light curve of the secondary star. The resulting light curve has marked deviations from the expected ellipsoidal shape. The largest difference is at phase 0.5, and can be explained as an eclipse of the secondary star by the disc, indicating that the disc is optically thick when viewed at high inclination angles.


Abstract Copyright: 2000, Royal Astronomical Society

Journal keyword(s): binaries: close - binaries: eclipsing - binaries: spectroscopic - stars: fundamental parameters - stars: individual: IP Peg - novae, cataclysmic variables

Simbad objects: 1

goto Full paper

goto View the references in ADS

Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 V* IP Peg CV* 23 23 08.5362249504 +18 24 59.206884012           M2 395 0

Query : 2000MNRAS.318....9B

Basic data :
V* IP Peg -- Cataclysmic Binary
Other object types: otypes_help 		CV* (2020MNRAS), V* (V*,AAVSO), * (WEB,Gaia), SB* (SBC9), PM* (2018yCat), NIR (2MASS), Opt (LAMOST), ev (ZTF)
ICRS coord. (ep=J2000) : 		23 23 08.5362249504 +18 24 59.206884012 (Optical) [ 0.0290 0.0229 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		23 20 38.6391258112 +18 08 32.516738770 [ 0.0290 0.0229 90 ]
Gal coord. (ep=J2000) : 		095.3338874816037 -39.6768881367989 [ 0.0290 0.0229 90 ]
Proper motions mas/yr : 		-61.849 -33.309 [0.040 0.028 90] A 2020yCat.1350....0G
Parallaxes (mas): 		7.093 [0.0377] A 2020yCat.1350....0G
Spectral type: 		M2 D ~
Fluxes (4) :
G 14.672627 [0.016719] C 2020yCat.1350....0G
J 12.601 [0.024] C 2003yCat.2246....0C
H 11.975 [0.022] C 2003yCat.2246....0C
K 11.721 [0.020] C 2003yCat.2246....0C
SIMBAD within arcmin
Overlay Simbad points in this preview
Back
All CDSPortal (CDSPortal)
Send to sendBySAMP sendBySAMP
sedIcon
within arcsec sed-help-icon

Identifiers (12) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

SV* SVS 2549 SBC9 1442 WEB 20444 AAVSO 2318+17
LAMOST J232308.57+182459.8 TIC 243129676 ZTF17aabulaf Gaia DR3 2824150286583562496
2MASS J23230854+1824593 V* IP Peg EQ 2320+181 Gaia DR2 2824150286583562496

References (395 between 1850 and 2026) (Total 395)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
Follow new references on this object
                Reference summaries :

                from: to:

                 or select by : (not exhaustive, explanation here)

Collections of Measurements Description of Measurements

Distance : 3    Var : 3    Plx : 2    PM : 2   

   

Observing logs
IUE : 32   

   

External archives :

Link by name to the catalogue in VizieR :

2MASS J23230854+1824593 V* IP Peg Gaia DR3 2824150286583562496 Gaia DR2 2824150286583562496

Search by coordinates in Vizier (radius: 5 arcsec)

Annotations :
Annotations allow a user to add a note or report an error concerning the astronomical object and its data. It requires registration to post a note. See description .
Please, have a look at Best practices. The list of all annotations to SIMBAD objects can be found here .

The annotation server is currently not available. Sorry for any inconvenience

To bookmark this query, right click on this link: simbad:objects in 2000MNRAS.318....9B and select 'bookmark this link' or equivalent in the popup menu