2025MNRAS.541L..35K

Query : 2025MNRAS.541L..35K

2025MNRAS.541L..35K - Mon. Not. R. Astron. Soc., 541, L35-L36 (2025/July-3)

The rapidly changing period of the QPE source 1ES 1927+654.

KING A.

Abstract (from CDS):

Several low-mass galaxy nuclei are observed to produce quasi-periodic eruptions (QPEs). Recently one of these systems, 1ES 1927+654, changed its quasi-period drastically, from ∼18 to ∼7.1 min, over a span of just 2 yr. I suggest that this is an effect of von Zeipel-Lidov-Kozai (ZLK) cycles, where a more distant star orbits the QPE 'binary' in which a white dwarf orbits a moderately massive central black hole. I show that in 1ES 1927+654 the white dwarf's orbital plane oscillates with angular amplitude $\simeq 71^{\circ }$ each side of the orbital plane of the distant star. This causes correlated changes of the orbital eccentricity and quasi-period, and of the accretion luminosity driven by gravitational radiation losses. The gravitational radiation (GR) luminosity has the characteristic property that it is inversely proportional to the instantaneous binary quasi-period in all cases. The QPE system is probably just one of the effects produced by a complex infall event involving several stars. The whole system is likely to evolve rapidly, and will repay further monitoring.

Abstract Copyright: © 2025 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.

Journal keyword(s): black hole physics - galaxies: active - supermassive black holes - X-rays: galaxies

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 RX J1927.3+6533 Sy2 19 27 19.5393064368 +65 33 54.335877408     15.4     ~ 147 0

Query : 2025MNRAS.541L..35K

Basic data :
RX J1927.3+6533 -- Seyfert 2 Galaxy
Other object types: otypes_help 		AGN ([VV2000c],[VV2003c],...), X (1ES,RX,...), Sy2 (2010A&A), AG? (2020MNRAS), G (2MASX), * (Gaia), Rad (WN)
ICRS coord. (ep=J2000) : 		19 27 19.5393064368 +65 33 54.335877408 (Optical) [ 0.1340 0.1358 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		19 27 01.9466919823 +65 27 42.270417076 [ 0.1340 0.1358 90 ]
Gal coord. (ep=J2000) : 		096.9840814062868 +20.9607708060231 [ 0.1340 0.1358 90 ]
Proper motions mas/yr : 		0.234 0.054 [0.164 0.169 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) 5053 [~] / z(~) 0.017000 [~] / cz 5096.47 [~]
   D 1996ESOSR..17....1V
Parallaxes (mas): 		0.1955 [0.2252] A 2018yCat.1345....0G
Angular size (arcmin): 		0.217 0.139 5 (NIR) C 2006AJ....131.1163S
Fluxes (5) :
V 15.4 [~] E ~
G 17.920223 [0.003824] C 2020yCat.1350....0G
J 14.140 [0.071] C 2006AJ....131.1163S
H 13.454 [0.079] C 2006AJ....131.1163S
K 13.316 [0.142] D 2006AJ....131.1163S
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Identifiers (13) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

1ES 1927+65.4 WN B1927+6527 [VV2006c] J192717.6+653414 Gaia DR3 2242649304261064064
2MASX J19271951+6533539 [FS2003] 1022 [VV2010c] J192717.6+653414
RX J1927.3+6533 [VV2000c] J192717.6+653414 [VV98c] J192717.6+653414
1RXS J192719.7+653354 [VV2003c] J192717.6+653414 Gaia DR2 2242649304261064064

References (147 between 1850 and 2026) (Total 147)
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 : 2    Plx : 1    PM : 2   

   

External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : RX J1927.3+6533

Link by name to the catalogue in VizieR :

2MASX J19271951+6533539 1RXS J192719.7+653354 WN B1927+6527 Gaia DR2 2242649304261064064 Gaia DR3 2242649304261064064

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