2007A&A...461.1107C

Query : 2007A&A...461.1107C

2007A&A...461.1107C - Astronomy and Astrophysics, volume 4611107-1113 (2007/1-3)

A possible activity cycle in Proxima Centauri.

CINCUNEGUI C., DIAZ R.F. and MAUAS P.J.D.

Abstract (from CDS):

Several late-type stars present activity cycles resembling the Solar one. This fact has been observed mostly in stars ranging from F to K, i.e., in stars with a radiative core and an outer convective layer. This work aims at studying whether an activity cycle can be detected in the dM5.5e star Proxima Centauri, which is supposed to be completely convective. We present periodical medium-resolution echelle observations covering the complete visual range, which were taken at the CASLEO Argentinean Observatory. These observations are distributed over 7 years. We discarded the spectra that present flare activity, and analyze the remaining activity levels using four different statistical techniques to look for a period of activity. We find strong evidence of a cyclic activity, with a period of ∼442days. We also estimate that the Ca II S index varies around 130% due to activity variations outside of flares.

Abstract Copyright: ∼

Journal keyword(s): stars: activity - stars: chromospheres - stars: flare - stars: individual: Proxima Centauri

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	NAME Proxima Centauri	PM*	14 29 42.9461331854	-62 40 46.164680672	14.21	12.95	11.13	9.45	7.41	M5.5Ve	1483	0

Query : 2007A&A...461.1107C

Basic data :

NAME Proxima Centauri -- High Proper Motion Star

* (2014AJ,*,...), PM* (2016ApJ,LHS,...), X (1E,2E,...), UV (2016ApJ,2EUVE,...), ** (CCDM,WDS), Er* (2017ARep,[GKL99]), Ro* (2012A&A), V* (CSV,V*), NIR (2MASS), MIR (WISEA), IR (IRAS)

14 29 42.9461331854 -62 40 46.164680672 (Optical) [ 0.0240 0.0344 90 ] A 2020yCat.1350....0G

14 26 19.0048317034 -62 28 04.375514672 [ 0.0240 0.0344 90 ]

313.9398620493784 -01.9271491330428 [ 0.0240 0.0344 90 ]

-3781.741 769.465 [0.031 0.051 90] A 2020yCat.1350....0G

V(km/s) -20.578199 [0.004684] / z(spectroscopic) -0.000069 [0.000000] / cz -20.58 [0.00] (NIR) A 2020AJ....160..120J

768.0665 [0.0499] A 2020yCat.1350....0G

M5.5Ve C 1991AJ....101..662B

U 14.21 [~] D 2014AJ....147...21J

B 12.95 [~] D 2014AJ....147...21J

V 11.13 [~] D 2014AJ....147...21J

R 9.45 [~] D 2014AJ....147...21J

G 8.984749 [0.002845] C 2020yCat.1350....0G

I 7.41 [~] D 2014AJ....147...21J

J 5.357 [0.023] C 2003yCat.2246....0C

H 4.835 [0.057] C 2003yCat.2246....0C

K 4.384 [0.033] C 2003yCat.2246....0C

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Hierarchy : number of linked objects
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An access of full data is available using the icon Vizier near the identifier of the catalogue

`LHS 49`	`EUVE J1430-62.6`	`NAME Proxima Cen`	`1RXS J142947.9-624058`
*` alf Cen C`**	`GEN# +6.10010551`	`NAME Proxima`	`TIC 388857263`
`AP J14294291-6240465`	`GEN# +6.00105721`	`NAME Proxima Centauri`	`TIC 1019422535`
`CCDM J14396-6050C`	`GJ 551`	`NLTT 37460`	*`V V645 Cen`**
`Ci 20 861`	`HIC 70890`	`PLX 3278`	`WDS J14396-6050C`
`CNS5 3591`	`HIP 70890`	`PLX 3278.00`	`WISEA J142937.35-624038.3`
`CSI-62-14263`	`IRAS 14260-6227`	`PM 14263-6228`	`Zkh 211`
`CSV 2142`	`JP11 5156`	`PM J14297-6240`	`[AOP94] 6`
`1E 1425.9-6228`	`JP11 5155`	`PMSC 14328-6025C`	`[FS2003] 0708`
`2E 1426.0-6227`	`JP11 5187`	`2RE J142946-624031`	`[GKL99] 301`
`2E 3278`	`LFT 1110`	`2RE J1429-624`	`[RHG95] 2291`
`1ES 1426-62.4`	`LPM 526`	`RE J1429-624`	`Gaia DR3 5853498713190525696`
`2EUVE J1429-62.6`	`LTT 5721`	`RE J142950-624056`	`Gaia DR2 5853498713160606720`
`EUVE J1429-62.6`	`2MASS J14294291-6240465`	`RX J1429.7-6240`

References (1483 between 1850 and 2026) (Total 1483)
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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Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : NAME Proxima Centauri

Link by name to the catalogue in VizieR :

`LHS 49`	`AP J14294291-6240465`	`CCDM J14396-6050C`	`2E 3278`	`EUVE J1429-62.6`
`EUVE J1430-62.6`	`GJ 551`	`HIC 70890`	`HIP 70890`	`IRAS 14260-6227`
`2MASS J14294291-6240465`	`NLTT 37460`	`PLX 3278`	`2RE J142946-624031`	`2RE J1429-624`
`1RXS J142947.9-624058`	*`V V645 Cen`**	`WDS J14396-6050C`	`WISEA J142937.35-624038.3`	`[GKL99] 301`
`Gaia DR3 5853498713190525696`	`Gaia DR2 5853498713160606720`

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