1994A&A...286..508G

Query : 1994A&A...286..508G

1994A&A...286..508G - Astronomy and Astrophysics, volume 286508-514 (1994/6-2)

The shock wave propagation effects in BL Herculis. I. The Hα profile.

GILLET D., BURKI G., CHATEL A., DUQUENNOY A. and LEBRE A.

Abstract (from CDS):

For the first time, high spectral resolution observations of the Hα profile of BL Her, obtained with a modern detector, during the whole pulsating period are presented. It clearly appears that the profile evolution is very similar to that observed in RR Lyrae stars which are localised just below the BL Herculis stars in the Population II instability strip. No secondary emission is detected. The pulsation has the form of a running wave. The shock wave associated with the emission is accelerated during its propagation between the photosphere and the region where the hydrogen line is formed. The effect of the 2:1 resonance between the fundamental mode and the second overtone is well observed on the photospheric radius and acceleration curves.

Abstract Copyright: ∼

Journal keyword(s): shock waves - line: profiles - stars: oscillations - stars: variables - stars: individual: BL Her

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* BL Her	WV*	18 01 09.2240599584	+19 14 56.696475012		10.54	9.70			F0	182	0

Query : 1994A&A...286..508G

Basic data :

V* BL Her -- Type II Cepheid Variable

* (HD,CSI,...), V* (AN,ASAS,...), WV* (2017ARep), NIR (2MASS)

18 01 09.2240599584 +19 14 56.696475012 (Optical) [ 0.0090 0.0127 90 ] A 2020yCat.1350....0G

17 58 58.7881792978 +19 14 56.965401356 [ 0.0090 0.0127 90 ]

045.1606577921315 +19.4633217214920 [ 0.0090 0.0127 90 ]

-4.051 -11.847 [0.015 0.017 90] A 2020yCat.1350....0G

V(km/s) 18.0 [2] / z(~) 0.000060 [0.000007] / cz 18.00 [2.00] E 1953GCRV..C......0W

0.8469 [0.0179] A 2020yCat.1350....0G

F0 E 1995A&AS..110..367N

B 10.54 [0.04] D 2000A&A...355L..27H

V 9.70 [~] C 2002yCat.2237....0D

G 10.172406 [0.007880] C 2020yCat.1350....0G

J 9.383 [0.021] C 2003yCat.2246....0C

H 9.181 [0.019] C 2003yCat.2246....0C

K 9.116 [0.015] C 2003yCat.2246....0C

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`HD 347827`	`GEN# +1.00347827`	`NSVS 10981152`	`WEB 14909`
`AN 84.1929`	`GSC 01562-01255`	`TIC 310927519`	`AAVSO 1756+19`
`ASAS J180109+1915.0`	`HIC 88242`	`TYC 1562-1255-1`	`Gaia DR3 4527596850906132352`
`CSI+19-17590`	`HIP 88242`	`uvby98 100347827`	`Gaia DR1 4527596846604488448`
`GCRV 10454`	`2MASS J18010922+1914567`	*`V BL Her`**	`Gaia DR2 4527596850906132352`

References (182 between 1850 and 2026) (Total 182)
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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`HD 347827`	`GSC 01562-01255`	`HIC 88242`	`HIP 88242`	`2MASS J18010922+1914567`
`TYC 1562-1255-1`	`uvby98 100347827`	*`V BL Her`**	`Gaia DR3 4527596850906132352`	`Gaia DR1 4527596846604488448`
`Gaia DR2 4527596850906132352`

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