2015A&A...575L...6P


Query : 2015A&A...575L...6P

2015A&A...575L...6P - Astronomy and Astrophysics, volume 575, L6-6 (2015/3-1)

Evidence of coupling between the thermal and nonthermal emission in the gamma-ray binary LS I +61 303.

PAREDES-FORTUNY X., RIBO M., BOSCH-RAMON V., CASARES J., FORS O. and NUNEZ J.

Abstract (from CDS):

The gamma-ray binary LS I +61 303 is composed of a Be star and a compact companion orbiting in an eccentric orbit. Variable flux modulated with the orbital period of ∼26.5 d has been detected from radio to very high-energy gamma rays. In addition, the system presents a superorbital variability of the phase and amplitude of the radio outbursts with a period of ∼4.6yr. We present optical photometric observations of LS I +61 303 spanning ∼1.5yr and contemporaneous Hα equivalent width (EW) data. The optical photometry shows, for the first time, that the known orbital modulation suffers a positive orbital phase shift and an increase in flux for data obtained 1-yr apart. This behavior is similar to that already known at radio wavelengths, indicating that the optical flux follows the superorbital variability as well. The orbital modulation of the EW presents the already known superorbital flux variability but shows, also for the first time, a positive orbital phase shift. In addition, the optical photometry exhibits a lag of ∼0.1-0.2 in orbital phase with respect to the EW measurements at similar superorbital phases, and presents a lag of ∼0.1 and ∼0.3 orbital phases with respect noncontemperaneous radio and X-ray outbursts, respectively. The phase shifts detected in the orbital modulation of thermal indicators, such as the optical flux and the EW, are in line with the observed behavior for nonthermal indicators, such as X-ray or radio emission. This shows that there is a strong coupling between the thermal and nonthermal emission processes in the gamma-ray binary LS I +61 303. The orbital phase lag between the optical flux and the EW is naturally explained considering different emitting regions in the circumstellar disk, whereas the secular evolution might be caused by the presence of a moving one-armed spiral density wave in the disk.

Abstract Copyright:

Journal keyword(s): X-rays: binaries - X-rays: individuals: LS I +61 303 - binaries: close - stars: emission-line, Be - gamma rays: stars

VizieR on-line data: <Available at CDS (J/A+A/575/L6): table1.dat table2.dat>

Simbad objects: 1

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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 - 2021
#notes
1 LS I +61 303 HXB 02 40 31.6641883136 +61 13 45.591138110 11.27 11.61 10.75 10.19 9.55 B0Ve 781 2

    Equat.    Gal    SGal    Ecl

Query : 2015A&A...575L...6P

Basic data :
LS I +61 303 -- High Mass X-ray Binary
Origin of the objects types :

(Ref) Object type as listed in the reference "Ref"
(acronym) Object type linked to the acronym according to the original reference
() Anterior to 2007, before we can link the objet type to a reference, or given by the CDS team in some particular cases

Other object types:
gam (1AGL,2AGL,...), * (HIP,ALS,...), X (2012ApJ,1E,...), Rad (BWE,GT,...), Em* (EM*,HBHA,...), V* (2012A&A,V*,...), HXB (2010A&A), IR (2MASS)
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
ICRS coord. (ep=J2000) :
02 40 31.6641883136 +61 13 45.591138110 (Optical) [ 0.0285 0.0300 90 ] A 2018yCat.1345....0G
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
FK4 coord. (ep=B1950 eq=1950) :
02 36 40.6251657173 +61 00 54.144722443 [ 0.0285 0.0300 90 ]
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
Gal coord. (ep=J2000) :
135.6752810663449 +01.0861288346950 [ 0.0285 0.0300 90 ]
Syntax of proper motions is : "pm-ra pm-dec [error ellipse] quality bibcode"
  • pm-ra : mu-ra*cos(dec) (expressed in the ICRS system in mas/yr)
  • pm-dec : mu-dec (expressed in the ICRS system in mas/yr)
  • [error ellipse] : error major axis and minor axis (in mas), orientation angle (in deg)
  • quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the proper motion reference
Proper motions mas/yr :
-0.296 -0.079 [0.041 0.067 90] A 2018yCat.1345....0G
Syntax of radial velocity (or/and redshift) is : "value [error] (wavelength) quality bibcode"
  • value : radial velocity or/and redshift (Heliocentric frame) according to your Output Options
    (redshift may be not displayed if the data value is <0 and the database inside value is a radial velocity)
  • [error] : error of the corresponding value displayed before
  • (wavelength) : wavelength range of the measurement : Rad, mm, IR, Opt, UV, Xray, Gam or  '∼'(unknown)
  • quality : flag of quality ( A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the value's origin
Radial velocity / Redshift / cz :
V(km/s) -41.41 [~] / z(~) -0.000138 [~] / cz -41.41 [~]
   D 2009ApJ...698..514A
Syntax of parallax is : 'value quality [error] bibcode'
  • value : parallax value
  • quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality)
  • [error] : mean error
  • bibcode : bibcode of the parallax reference
Parallaxes (mas):
0.3801 [0.0380] A 2018yCat.1345....0G
Spectral type is made of 3 parts: %coding is composed of 4 parts :
  • the spectral type, which is made of a temperature class, eventually a luminosity class (roman number) and/or spectral peculiarities;
  • a quality letter: A=best quality→E=worst quality, {� } =unknown quality %
  • a quality letter: A=best quality -> E=worst quality, {� } =unknown quality
  • bibcode : bibcode of the spectral type reference
Spectral type:
B0Ve D ~
Syntax of fluxes (or magnitudes) is : "filter-name (System) flux-value [error] quality MultVarFlags bibcode"
  • filter-name : U, B, V, R, I, G, J, H, K, u, g, r, i, z
  • (System) : may be AB (default is Vega)
  • flux-value : value of flux or magnitude
  • [error] : error value
  • quality : flag of quality of the flux value ( A=best quality -> E=worst quality, {� } =unknown quality)
  • MultVarFlags : Mult is zero or one char (J) for joined photometry ; Var can be zero or two chars (V[0-4])
  • bibcode : bibcode of the flux reference
Fluxes (9) :
U 11.27 [~] D 2003AJ....125.2531R
B 11.61 [~] D 2015A&A...574A..33R
V 10.75 [~] D 2015A&A...574A..33R
R 10.19 [~] D 2015A&A...574A..33R
G 10.3933 [0.0011] C 2018yCat.1345....0G
I 9.55 [~] D 2015A&A...574A..33R
J 8.621 [0.024] C 2003yCat.2246....0C
H 8.228 [0.021] C 2003yCat.2246....0C
K 7.917 [0.023] C 2003yCat.2246....0C
SIMBAD within arcmin
', {sourceSize:12, color:'#30a090'})); aladin.on('objectClicked', function(object) { var objName=object.data.MAIN_ID; aladin.showPopup(object.ra,object.dec,'',''+ objName+''); });" title="Show Simbad objects"> Overlay Simbad points in this preview
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The search radius has to be specified by the user. It is currently limited to a maximum of 30 arcsec. It depends mostly on the precision or quality of the coordinates (SIMBAD and VizieR catalogs), the resolution of the images from which the sources were extracted, source extent, and source crowding.
Suggestions are: crowded field: 0.5 to 1.5 arcsec, 3 arcsec otherwise; uncertain coordinates (SIMBAD quality E or coordinates without reference): 5 to 30 arsec (risky!).
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Some important notes on this object about identifications and objects associations.
notes:


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

: 1 : 998 Display criteria :

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (70) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

HIP 12469 1FGL J0240.5+6116 IGR J02403+6113 UBV M 50704
1AGL J0242+6111 1FGL J0240.5+6113 INTREF 123 V* V615 Cas
2AGL J0239+6120 2FGL J0240.5+6113 INTREF 125 VER J0240+612
1AGLR J0240+6115 3FGL J0240.5+6113 LS I +61 303 WN B0236.6+6100
ALS 7373 4FGL J0240.5+6113 LS I +63 303 2XMM J024031.6+611345
BWE 0236+6101 1FHL J0240.2+6113 MAGIC J0240+613 [BM83] X0236+610
1CG 135+01 2FHL J0240.5+6113 2MASS J02403165+6113456 [BSF97] J024031.66+611345.6
2CG 135+01 3FHL J0240.5+6113 NAME LS I +63 303 [CS2018] W4-I19
CSI+61-02367 1FLE J0238+6115 NVSS J024031+611345 [KW97] 13-1
1E 0236.6+6100 GEN# +8.01610303 PBC J0240.6+6114 [MPP98] 3
2E 627 GEN# +6.20055754 RGB J0240+612 [TSA98] J024031.33+611342.71
2E 0236.6+6101 GeV J0241+6102 RX J0240.4+6112 [VGK85] IC 1805 +61 182
2EG J0241+6119 GRO J0240+61 1RXS J024033.5+611358 AAVSO 0234+61
3EG J0241+6103 GRO J0241+61 SWIFT J0240.5+6118 AAVSO 0232+60
EGR J0240+6112 GSC 04047-01917 SWIFT J0240.9+6115 Gaia DR1 465645510826577280
EM* VES 754 GT 0236+610 TeV J0240+612 Gaia DR2 465645515129855872
1ES 0236+61.0 HBHA 6212-42 TIC 50190107
0FGL J0240.3+6113 HIC 12469 TYC 4047-1917-1

References (781 between 1850 and 2021) (Total 781)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements


velocities : 1    distance : 2    PLX : 3    PM : 3    MK : 1   

   

Observing logs


IUE : 17    XMM : 6   

   


External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : LS I +61 303

Link by name to the catalogue in VizieR :

HIP 12469 ALS 7373 BWE 0236+6101 2E 627 3EG J0241+6103
GSC 04047-01917 HIC 12469 LS I +61 303 LS I +63 303 2MASS J02403165+6113456
NVSS J024031+611345 1RXS J024033.5+611358 TYC 4047-1917-1 V* V615 Cas WN B0236.6+6100
Gaia DR1 465645510826577280 Gaia DR2 465645515129855872

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2021.07.29-03:01:05

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