2022MNRAS.517L.143K

Query : 2022MNRAS.517L.143K

2022MNRAS.517L.143K - Mon. Not. R. Astron. Soc., 517, L143-L145 (2022/November-3)

First detection of the He I 10 830 Å emission in spectra of classical Cepheid X Cyg.

KOVTYUKH V.V., ANDRIEVSKY S.M. and KOROTIN S.A.

Abstract (from CDS):

For the first time, we describe a detection of the emission in the infrared (IR) He I triplet at 10 830 Å in the classical Cepheid X Cyg. Emissions are clearly seen at phases approximately from 0.25 to 0.85. The IR redshifted He I emission is excited by shock wave in the uppermost layers of the star's envelope, in its falling layers. This is a first detection of the helium IR emission in the classical Cepheids.

Journal keyword(s): stars: atmospheres - stars: chromospheres - stars: variables: Cepheids

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* X Cyg	cC*	20 43 24.1917118680	+35 35 16.077149700	8.69	7.70	6.47		5.241	F7Ib	496	0

Query : 2022MNRAS.517L.143K

Basic data :

V* X Cyg -- Classical Cepheid Variable

* (HD,AG,...), cC* (2018yCat), V* (V*,AAVSO), SB* (2024A&A), NIR (2MASS), MIR (MSX5C), IR (IRAS)

20 43 24.1917118680 +35 35 16.077149700 (Optical) [ 0.0120 0.0155 90 ] A 2020yCat.1350....0G

20 41 26.6163127532 +35 24 24.100267613 [ 0.0120 0.0155 90 ]

076.8704678796162 -04.2626330625506 [ 0.0120 0.0155 90 ]

-6.673 -5.108 [0.015 0.017 90] A 2020yCat.1350....0G

V(km/s) 3.4710 [0.0663] / z(spectroscopic) 0.000012 [0.000000] / cz 3.47 [0.07] (NIR) A 2022ApJS..259...35A

0.8842 [0.0199] A 2020yCat.1350....0G

F7Ib C 1960ApJ...131..330K

U 8.69 [~] C 2002yCat.2237....0D

B 7.70 [~] C 2002yCat.2237....0D

V 6.47 [~] C 2002yCat.2237....0D

G 6.199011 [0.011586] C 2022yCat.1355....0G

I 5.241 [~] D 2006MNRAS.369..723N

J 4.40 [~] C 2002yCat.2237....0D

H 3.94 [~] C 2002yCat.2237....0D

K 3.76 [~] C 2002yCat.2237....0D

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`HD 197572`	`HIC 102276`	`PLX 4944.00`	*`V X Cyg`**
`AG+35 2089`	`HIP 102276`	`PPM 85419`	`WEB 18513`
`ALS 11506`	`HR 7932`	`ROT 3026`	`AAVSO 2039+35`
`BD+35 4234`	`IRAS 20414+3524`	`SAO 70423`	`Gaia DR3 1870258975238302208`
`GC 28886`	`LS II +35 79`	`SKY# 39281`	`Gaia DR1 1870258970926193024`
`GCRV 12989`	`2MASS J20432419+3535161`	`TIC 100406081`	`Gaia DR2 1870258975238302208`
`GEN# +1.00197572`	`MSX5C G076.8697-04.2618`	`TYC 2695-4136-1`
`GSC 02695-04136`	`PLX 4944`	`uvby98 100197572`

References (496 between 1850 and 2026) (Total 496)
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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Data at NED - NASA/IPAC Extragalactic Database : V* X Cyg

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`HD 197572`	`AG+35 2089`	`ALS 11506`	`BD+35 4234`	`GSC 02695-04136`
`HIC 102276`	`HIP 102276`	`HR 7932`	`IRAS 20414+3524`	`LS II +35 79`
`2MASS J20432419+3535161`	`MSX5C G076.8697-04.2618`	`PLX 4944`	`PPM 85419`	`SAO 70423`
`TYC 2695-4136-1`	`uvby98 100197572`	*`V X Cyg`**	`Gaia DR3 1870258975238302208`	`Gaia DR1 1870258970926193024`
`Gaia DR2 1870258975238302208`

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