2004A&A...426.1035G


Query : 2004A&A...426.1035G

2004A&A...426.1035G - Astronomy and Astrophysics, volume 426, 1035-1045 (2004/11-2)

X-ray spectroscopy of the W UMa-type binary 44 Bootis.

GONDOIN P.

Abstract (from CDS):

44 Boo B, a W UMa-type binary system, was observed in June 2001 during one entire revolution period with the XMM-Newton observatory. The count rate in the 0.3 to 2keV band is constant in average with 5 to 20% count rate increases reminiscent of flares. Spectral fitting of the EPIC spectra indicates a corona configuration with little contribution from quiet regions, similar to the Sun. On the contrary, the (2-9)x106K temperature range of the ``cool'' plasma suggests that the active corona around the two companions is densely filled with low-lying loops similar to those found in solar-type active regions. The 44 Boo O VII He-like triplet constrains the electron density to an upper limit ne<8.6x1010cm–3. We argue that this low-lying loop system may be overlaid by larger loops. Magnetic reconnection phenomena in this large loops system may explain the characteristic flare decay time in the light curve that implies loop lengths of about 16x109cm. An extended corona around 44 Boo would explain the absence of eclipses in its X-ray light curve. The average element abundance in 44 Boo corona is found to be lower than the solar photospheric value. The spectral analysis indicates enhanced abundances of oxygen and neon relative to iron which suggest an inverse FIP effect. Compared with other active binary systems such as RS CVn or BY Dra, 44 Boo has relatively less material at temperatures higher than 107K and the temperature of its hottest plasma component appears to be lower.

Abstract Copyright:

Journal keyword(s): stars: individual: 44 Bootis - stars: activity - stars: coronae - stars: late-type - X-rays: stars - stars: binaries: general

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 * i Boo EB* 15 03 47.29565 +47 39 14.6228           G0Vn 527 0

    Equat.    Gal    SGal    Ecl

Query : 2004A&A...426.1035G

Basic data :
* i Boo -- Eclipsing 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:
* (*,BD,...), X (2015A&A,1AXG,...), ** (1997A&AS,**,...), UV (2EUVE,EUVE,...), IR (IRAS,2MASS,...), PM* (2016ApJ,Ci), EB* (2017ARep), V* (V*)
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) :
15 03 47.29565 +47 39 14.6228 (Optical) [ 14.67 12.65 90 ] A 2007A&A...474..653V
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) :
15 02 08.41139 +47 50 52.8320 [ 14.67 12.65 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) :
080.36969096 +57.06601288 [ 14.67 12.65 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 :
-445.84 19.86 [1.44 1.67 0] A 2007A&A...474..653V
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) -17.89 [0.4] / z(~) -0.000060 [0.000001] / cz -17.89 [0.40]
   A 2005MNRAS.357..497B
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):
79.95 [1.56] A 2007A&A...474..653V
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:
G0Vn C 2001AJ....121.2148G
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 (3) :
J 3.42 [0.28] D 2003yCat.2246....0C
H 3.12 [0.23] D 2003yCat.2246....0C
K 3.01 [0.27] D 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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%This number is the number of distinct objets linked, by using this button, you will obtain all links (may be more than one) from that object to his children

: 2
Display criteria :

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (52) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

* i Boo EUVE J1503+47.6 NAME I Boo* SKY# 27315
* 44 Boo EXO 1502.0+4749 PLX 3410 TD1 17940
** STF 1909 GC 20281 PMSC 15005+4803 TIC 283819432
ADS 9494 AB GCRV 65212 RBS 1458 UBV M 20543
1AXG J150349+4739 GEN# +1.00133640 2RE J150345+473901 UCAC3 276-123545
BD+48 2259 GJ 575 2RE J1503+473 UCAC4 689-055438
CCDM J15038+4739AB HD 133640 RE J150345+473900 uvby98 100133640 ABV
Ci 20 907 HIC 73695 RE J1503+473 V* i Boo
CSI+48 2259 1 HIP 73695 ROT 5698 WDS J15038+4739AB
2E 3373 HR 5618 RX J1503.7+4739 WEB 12597
2E 1502.1+4751 IRAS 15021+4750 RX J1503.8+4739 WISEA J150346.76+473916.8
1ES 1502+47.8 2MASS J15034736+4739152 1RXS J150348.3+473924 [FS2003] 0748
2EUVE J1503+47.6 N30 3404 SAO 45357 [ZEH2003] RX J1503.8+4739 1

References (527 between 1850 and 2021) (Total 527)
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 : 15    V* : 2    ROT : 3    Fe_H : 12    PLX : 2    PM : 5    MK : 2   

   

Observing logs


herschel : 2    IUE : 54    XMM : 1   

   


External archives :

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

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

Link by name to the catalogue in VizieR :

BD+48 2259 CCDM J15038+4739AB 2E 3373 EUVE J1503+47.6 GJ 575
HD 133640 HIC 73695 HIP 73695 HR 5618 IRAS 15021+4750
2MASS J15034736+4739152 PLX 3410 2RE J150345+473901 2RE J1503+473 1RXS J150348.3+473924
SAO 45357 TD1 17940 UCAC3 276-123545 UCAC4 689-055438 uvby98 100133640 ABV
V* i Boo WDS J15038+4739AB WISEA J150346.76+473916.8

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2021.07.27-06:46:25

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