2016MNRAS.461..286Z

Query : 2016MNRAS.461..286Z

2016MNRAS.461..286Z - Mon. Not. R. Astron. Soc., 461, 286-296 (2016/September-1)

Recent X-ray observations of the symbiotic star AG Peg: do they signify colliding stellar winds?

ZHEKOV S.A. and TOMOV T.

Abstract (from CDS):

We present an analysis of recent X-ray observations of the symbiotic star AG Peg. The X-ray emission of AG Peg as observed with Swift in 2015 shows considerable variability on time-scale of days as variability on shorter time-scales might be present as well. Analysis of the X-ray spectra obtained in 2013 and 2015 confirms that AG Peg is an X-ray source of class β of the X-ray sources amongst the symbiotic stars. The X-ray emission of AG Peg as observed with ROSAT (1993 June) might well originate from colliding stellar winds (CSWs) in binary system. On the other hand, the characteristics of the X-ray emission of AG Peg in 2013 and 2015 (Swift ) are hard to accommodate in the framework of the CSW picture. Analysis of the light curves in 2015 shows that the power spectrum of the X-ray variability in AG Peg resembles that of the flicker noise (or flickering) being typical for accretion processes in astronomical objects. This is a sign that CSWs did not play a key role for the X-ray emission from AG Peg in 2013-2015 and a different mechanism (probably accretion) is also getting into play.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): shock waves - stars: binaries: symbiotic - stars: individual: AG Peg - X-rays: stars - X-rays: stars

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 - 2026 		#notes
1 V* AG Peg Sy* 21 51 01.9739297352 +12 37 32.127939336   9.85 8.69     M3IIIe 534 0

Query : 2016MNRAS.461..286Z

Basic data :
V* AG Peg -- Symbiotic Star
Other object types: otypes_help 		* (2022AJ,HD,...), SB* (SBC7,SBC9), V* (V*,AAVSO), X (RX,1RXS), MIR (WISEA,WISE), Sy* (1980MNRAS), LP? (2022yCat), Em* (EM*), UV (TD1), NIR (2MASS), IR (IRAS)
ICRS coord. (ep=J2000) : 		21 51 01.9739297352 +12 37 32.127939336 (Optical) [ 0.0286 0.0255 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		21 48 36.1780415740 +12 23 27.385806270 [ 0.0286 0.0255 90 ]
Gal coord. (ep=J2000) : 		069.2777936099102 -30.8868635716419 [ 0.0286 0.0255 90 ]
Proper motions mas/yr : 		-1.382 -1.728 [0.036 0.033 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) -11.6483 [0.0598] / z(spectroscopic) -0.000039 [0.000000] / cz -11.65 [0.06]
   (NIR) A 2022ApJS..259...35A
Parallaxes (mas): 		0.7538 [0.0354] A 2020yCat.1350....0G
Spectral type: 		M3IIIe C 1988A&A...189...97S
Fluxes (6) :
B 9.85 [0.03] D 2000A&A...355L..27H
V 8.69 [0.02] D 2000A&A...355L..27H
G 7.810774 [0.003728] C 2020yCat.1350....0G
J 5.001 [0.018] C 2003yCat.2246....0C
H 4.371 [0.246] D 2003yCat.2246....0C
K 3.851 [0.016] E 2003yCat.2246....0C
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Identifiers (39) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

HD 207757 HIC 107848 1RXS J215102.8+123745 WEB 19447
AG+12 2570 HIP 107848 SAO 107436 WISEA J215101.95+123732.0
AGKR 19529 IRAS 21486+1223 SBC7 879 WISE J215101.95+123732.2
AP J21510198+1237320 JP11 3412 SBC9 1335 YZ 12 8693
BD+11 4673 2MASS J21510198+1237320 SKY# 41636 [ZEH2003] RX J2151.0+1237 2
DO 7622 PLX 5279 TD1 28516 AAVSO 2146+12
EM* MWC 379 PLX 5279.00 TIC 385053976 Gaia DR3 1766454215586119680
GCRV 13724 PMC 90-93 4468 TYC 1130-653-1 Gaia DR1 1766454215586119680
GEN# +1.00207757 PPM 140717 UCAC4 514-136415 Gaia DR2 1766454215586119680
GSC 01130-00653 RX J2151.0+1237 V* AG Peg

References (534 between 1850 and 2026) (Total 534)
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 Description of Measurements

Velocities : 6    Distance : 2    Fe/H : 2    Plx : 4    PM : 6    SpT : 2   

   

Observing logs
Herschel : 3    ISO : 2    IUE : 127   

   

External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : V* AG Peg

Link by name to the catalogue in VizieR :

HD 207757 AG+12 2570 AP J21510198+1237320 BD+11 4673 DO 7622
GSC 01130-00653 HIC 107848 HIP 107848 IRAS 21486+1223 2MASS J21510198+1237320
PLX 5279 PPM 140717 1RXS J215102.8+123745 SAO 107436 TD1 28516
TYC 1130-653-1 UCAC4 514-136415 V* AG Peg WISEA J215101.95+123732.0 WISE J215101.95+123732.2
Gaia DR3 1766454215586119680 Gaia DR1 1766454215586119680 Gaia DR2 1766454215586119680

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