2011MNRAS.414L..85U

Query : 2011MNRAS.414L..85U

2011MNRAS.414L..85U - Mon. Not. R. Astron. Soc., 414, L85-L89 (2011/June-2)

The cataclysmic variable SDSS J1507+52: an eclipsing period bouncer in the galactic halo.

UTHAS H., KNIGGE C., LONG K.S., PATTERSON J. and THORSTENSEN J.

Abstract (from CDS):

SDSS J1507+52 is an eclipsing cataclysmic variable (CV) consisting of a cool, non-radially pulsating white dwarf and an unusually small substellar secondary. The system has a high space velocity and a very short orbital period of about 67 min, well below the usual minimum period for CVs. To explain the existence of this peculiar system, two theories have been proposed. One suggests that SDSS J1507+52 was formed from a detached white dwarf–brown dwarf binary. The other theory proposes that the system is a member of the Galactic halo population.

Here, we present the ultraviolet (UV) spectroscopy of SDSS J1507+52 obtained with the Hubble Space Telescope with the aim of distinguishing between these two theories. The UV flux of the system is dominated by the emission from the accreting white dwarf. Fits to model stellar atmospheres yield physical parameter estimates of Teff= 14 200±500 K, log g= 8.2±0.3, v sin i= 180±20 km/s and [Fe/H]=-1.2±0.2. These fits suggest a distance towards SDSS J1507+52 of d= 250±50 pc. The quoted uncertainties include systematic errors associated with the adopted fitting windows and interstellar reddening.

Assuming that there is no contribution to the UV flux from a hot, optically thick boundary layer, we find a Teff much higher than previously estimated from eclipse analyses. The strongly subsolar metallicity we infer for SDSS J1507+52 is consistent with that of halo stars at the same space velocity. We therefore conclude that SDSS J1507+52 is a member of the Galactic halo.


Abstract Copyright: 2011 The Authors Monthly Notices of the Royal Astronomical Society2011 RAS

Journal keyword(s): binaries: close - stars: dwarf novae - stars: individual: SDSS J1507+52 - 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* OV Boo CV* 15 07 22.3698571080 +52 30 39.804859764   18.7   18.5   DAe 82 0

Query : 2011MNRAS.414L..85U

Basic data :
V* OV Boo -- Cataclysmic Binary
Other object types: otypes_help 		CV* (2019MNRAS), PM* (2018yCat,LSPM,...), CV? (2015MNRAS), WD? (2018MNRAS), * (USNO,Gaia), WD* (2008PASP), V* (V*), Opt (SDSS)
ICRS coord. (ep=J2000) : 		15 07 22.3698571080 +52 30 39.804859764 (Optical) [ 0.0769 0.0855 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		15 05 52.9784151079 +52 42 05.413412688 [ 0.0769 0.0855 90 ]
Gal coord. (ep=J2000) : 		087.3830951496832 +54.1886052987407 [ 0.0769 0.0855 90 ]
Proper motions mas/yr : 		-149.273 41.138 [0.076 0.098 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) 0 [120] / z(spectroscopic) 0.00000 [0.00040] / cz 0.0 [119.9]
   E 2008ApJS..175..297A
Parallaxes (mas): 		4.7149 [0.0906] A 2020yCat.1350....0G
Spectral type: 		DAe D 2008PASP..120..510P
Fluxes (8) :
B 18.7 [~] E 2003AJ....125..984M
R 18.5 [~] E 2003AJ....125..984M
G 18.149862 [0.013335] C 2022yCat.1355....0G
u (AB) 18.479 [0.017] C 2012ApJS..203...21A
g (AB) 18.314 [0.007] B 2009ApJS..182..543A
r (AB) 18.451 [0.008] B 2012ApJS..203...21A
i (AB) 18.612 [0.011] C 2008ApJS..175..297A
z (AB) 18.436 [0.028] C 2012ApJS..203...21A
SIMBAD within arcmin
Overlay Simbad points in this preview
Back
All CDSPortal (CDSPortal)
Send to sendBySAMP sendBySAMP
sedIcon
within arcsec sed-help-icon

Identifiers (10) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

SDSS J150722.33+523039.8 SDSS J150722.30+523039.8 USNO-B1.0 1425-00298263 Gaia DR2 1593140224924964864
LSPM J1507+5230 SDSS J150722.32+523039.8 V* OV Boo
PM J15073+5230 SDSS J150722.16+523040.2 Gaia DR3 1593140224924964864

References (82 between 1850 and 2026) (Total 82)
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

Velocities : 2    Distance : 3    Var : 2    Plx : 2    PM : 3    SpT : 1   

   

External archives :

Data at NED - NASA/IPAC Extragalactic Database : V* OV Boo

Link by name to the catalogue in VizieR :

SDSS J150722.33+523039.8 LSPM J1507+5230 SDSS J150722.30+523039.8 SDSS J150722.32+523039.8 SDSS J150722.16+523040.2
USNO-B1.0 1425-00298263 V* OV Boo Gaia DR3 1593140224924964864 Gaia DR2 1593140224924964864

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 2011MNRAS.414L..85U and select 'bookmark this link' or equivalent in the popup menu