2021AJ....162...92E

Query : 2021AJ....162...92E

2021AJ....162...92E - Astron. J., 162, 92-92 (2021/September-0)

X-rays in Cepheids: XMM-Newton observations of η Aql.

EVANS N.R., PILLITTERI I., KERVELLA P., ENGLE S., GUINAN E., GUNTHER H.M., WOLK S., NEILSON H., MARENGO M., MATTHEWS L.D., MOSCHOU S., DRAKE J.J., GUZIK J.A., GALLENNE A., MERAND A. and HOCDE V.

Abstract (from CDS):

X-ray bursts have recently been discovered in the Cepheids δ Cep and β Dor modulated by the pulsation cycle. We have obtained an observation of the Cepheid η Aql with the XMM-Newton satellite at the phase of maximum radius; the phase at which there is a burst of X-rays in δ Cep. No X-rays were seen from the Cepheid η Aql at this phase, and the implications for Cepheid upper atmospheres are discussed. We have also used the combination of X-ray sources, as well as Gaia and 2MASS data, to search for a possible grouping around the young intermediate mass Cepheid. No indication of such a group was found.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): Cepheid variable stars

VizieR on-line data: <Available at CDS (J/AJ/162/92): table1.dat table3.dat table4.dat>

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 7

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Number of rows : 7
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 * alf UMi cC* 02 31 49.09456 +89 15 50.7923 3.00 2.62 2.02 1.53 1.22 F8Ib 716 2
2 * bet Dor cC* 05 33 37.5159729864 -62 29 23.376457680 5.13 4.58 3.76 3.55 3.12 F8/G0Ib 401 0
3 * l Car cC* 09 45 14.8117044917 -62 30 28.450312664   5.09 3.75     G5Iab/b 343 0
4 V* S Mus cC* 12 12 47.0199008472 -70 09 06.439196664 7.58 8.80 8.33 7.39 5.196 F6Ib+B5V 275 0
5 HD 187900 * 19 52 19.6935946584 +00 57 40.381716600   10.42 9.28     K2 5 0
6 * eta Aql cC* 19 52 28.3689223781 +01 00 20.371980515 5.12 4.61 3.80   3.030 F6Iab+B9.8V 701 0
7 * del Cep cC* 22 29 10.2626640314 +58 24 54.697613650 4.71 4.35 3.75   3.219 F5Iab:+B7-8 763 0

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