2007ApJ...659L.145Y

Query : 2007ApJ...659L.145Y

2007ApJ...659L.145Y - Astrophys. J., 659, L145-L148 (2007/April-3)

Coupling between the 45 Hz horizontal-branch oscillation and the normal-branch oscillation in Scorpius X-1.

YU W.

Abstract (from CDS):

The observations of the bright persistent neutron star low-mass X-ray binary (LMXB) Sco X-1 performed with the Rossi X-Ray Timing Explorer (RXTE) show a ∼6 Hz normal-branch oscillation (NBO), a ∼45 Hz horizontal-branch oscillation (HBO), and twin kilohertz quasi-periodic oscillations (kHz QPOs) on its normal branch simultaneously. We have found that the fractional amplitude of the HBO corresponding to the NBO phase of high flux is 1.1%, while that of the NBO phase of low flux is undetectable, with a 3 σ upper limit of 0.4%, implying that the HBO strength varies with the NBO phase in a manner opposite that of the lower kHz QPO previously found, and suggests that the condition for the generation of the HBO is met when the NBO flux is high. The 6 Hz NBO in Sco X-1 connects the 45 Hz HBO and the twin kHz QPO together, showing a unique picture indicating a coupling between the QPOs, which has never been observed in other neutron star LMXBs. We discuss the implications for current models of the 45 Hz HBO, the 6 Hz NBO, and the twin kHz QPOs.

Abstract Copyright: ∼

Journal keyword(s): Accretion, Accretion Disks - Stars: Individual: Constellation Name: Scorpius X-1 - Stars: Neutron - X-Rays: Stars

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* V818 Sco LXB 16 19 55.0692669024 -15 38 25.017666540 11.60 12.40 11.1     Oev 1730 0

Query : 2007ApJ...659L.145Y

Basic data :
V* V818 Sco -- Low Mass X-ray Binary
Other object types: otypes_help 		X (2022MNRAS,X,...), * (EPIC,PLX,...), UV (2EUVE,EUVE,...), LXB (2013ApJS), V* (2012A&A,V*,...), SB* (SBC7,SBC9), gam (INTEGRAL1,INTREF), N* (2014MNRAS), N*? (2007ApJS), Ro* (2018AJ), blu (2021A&A), NIR (2MASS)
ICRS coord. (ep=J2000) : 		16 19 55.0692669024 -15 38 25.017666540 (Optical) [ 0.0205 0.0129 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		16 17 04.4828966919 -15 31 14.836367728 [ 0.0205 0.0129 90 ]
Gal coord. (ep=J2000) : 		359.0941818238605 +23.7843946654671 [ 0.0205 0.0129 90 ]
Proper motions mas/yr : 		-7.185 -12.332 [0.027 0.019 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) -138.5 [~] / z(~) -0.000462 [~] / cz -138.47 [~]
   E 1995A&AS..114..269D
Parallaxes (mas): 		0.4297 [0.022] A 2020yCat.1350....0G
Spectral type: 		Oev E ~
Fluxes (7) :
U 11.60 [~] D 2007A&A...469..807L
B 12.40 [~] D 2007A&A...469..807L
V 11.1 [~] D 1995GCTP..C......0V
G 12.457144 [0.014054] C 2020yCat.1350....0G
J 11.907 [0.027] C 2003yCat.2246....0C
H 11.547 [0.026] C 2003yCat.2246....0C
K 11.147 [0.023] 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

Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 1 : 7730 Display criteria :

Identifiers (40) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

X Sco XR-1 INTEGRAL1 21 RE J161956-153814 V* V818 Sco
2A 1616-155 INTREF 685 RE J1619-153 WEB 13546
3A 1617-155 KOHX 20 SBC7 569 1XRS 16170-155
EPIC 205703810 1M 1617-155 SBC9 895 XSS J16204-1536
2EUVE J1619-15.6 2MASS J16195506-1538250 SRGA J161954.6-153821 X Sco X-1
EUVE J1619-15.6 2MAXI J1619-155 SWIFT J1620.1-1539 [BM83] X1617-155
GALEX J161955.0-153825 PBC J1619.9-1538 TIC 52901460 [KRL2007b] 184
1H 1617-155 PLX 3702.01 2U 1617-15 AAVSO 1614-15
H 1620-15 2RE J161955-153824 3U 1617-15 Gaia DR3 4328198145165324800
H 1617-155 2RE J1619-153 4U 1617-15 Gaia DR2 4328198145165324800

References (1730 between 1850 and 2026) (Total 1730)
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 : 1    Distance : 2    Var : 1    Plx : 3    PM : 2   

   

Observing logs
ISO : 11    IUE : 92    XMM : 7   

   

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : V* V818 Sco

Link by name to the catalogue in VizieR :

EUVE J1619-15.6 GALEX J161955.0-153825 2MASS J16195506-1538250 2RE J161955-153824 2RE J1619-153
V* V818 Sco Gaia DR3 4328198145165324800 Gaia DR2 4328198145165324800

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 2007ApJ...659L.145Y and select 'bookmark this link' or equivalent in the popup menu