2012A&A...542A..57P

Query : 2012A&A...542A..57P

2012A&A...542A..57P - Astronomy and Astrophysics, volume 542A57-57 (2012/6-1)

Time-dependent spectral-feature variations of stars displaying the B[e] phenomenon. I. V2028 Cygni.

POLSTER J., KORCAKOVA D., VOTRUBA V., SKODA P., SLECHTA M., KUCEROVA B. and KUBAT J.

Abstract (from CDS):

We present results of nearly six years of spectroscopic observations of the B[e] star V2028 Cyg. The presence of the cold-type absorption lines combined with a hot-type spectrum indicate the binarity of this object. Since B[e] stars are embedded in an extended envelope, the usage of common stellar atmosphere models for the analysis is quite inappropriate. Therefore, we focus on the analysis of the long-term spectral line variations in order to determine the nature of this object. We present the time dependences of the equivalent width and radial velocities of the Hα line, [OI] 6300Å, FeII 6427, 6433, and 6456Å lines. The bisector variations and line intensities are shown for the Hα line. The radial velocities are also measured for the absorption lines of the K component. No periodic variation is found. The observed data show correlations between the measured quantities, which can be used in future modelling.

Abstract Copyright: ∼

Journal keyword(s): line: profiles - binaries: general - circumstellar matter - stars: emission-line, Be - stars: individual

VizieR on-line data: <Available at CDS (J/A+A/542/A57): table1.dat spectra/*>

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 EM* MWC 623 ** 19 56 31.5417133728 +31 06 20.124534348   11.98 10.92     K2Ib/II+B4III[e] 81 0

Query : 2012A&A...542A..57P

Basic data :
EM* MWC 623 -- Double or Multiple Star
Other object types: otypes_help 		* (TYC,ALS,...), Em* (EM*,HBHA,...), ** (2001A&A), V* (2012A&A,V*), NIR (2MASS), IR (IRAS)
ICRS coord. (ep=J2000) : 		19 56 31.5417133728 +31 06 20.124534348 (Optical) [ 0.0106 0.0131 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		19 54 32.9756339741 +30 58 16.300407570 [ 0.0106 0.0131 90 ]
Gal coord. (ep=J2000) : 		067.6344653432521 +01.2636283943267 [ 0.0106 0.0131 90 ]
Proper motions mas/yr : 		-2.917 -5.300 [0.014 0.016 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) -3.682070 [0.014727] / z(spectroscopic) -0.000012 [0.000000] / cz -3.68 [0.01]
   (NIR) A 2020AJ....160..120J
Parallaxes (mas): 		0.2703 [0.0151] A 2020yCat.1350....0G
Spectral type: 		K2Ib/II+B4III[e] C 2001A&A...375..122Z
Fluxes (6) :
B 11.98 [0.15] D 2000A&A...355L..27H
V 10.92 [0.07] D 2000A&A...355L..27H
G 9.930428 [0.002966] C 2020yCat.1350....0G
J 7.096 [0.021] C 2003yCat.2246....0C
H 6.10 [0.03] C 2003yCat.2246....0C
K 5.379 [0.018] C 2003yCat.2246....0C
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Identifiers (19) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

TYC 2669-4333-1 GSC 02669-04333 LS II +30 8 [KW97] 41-11
ALS 10651 HBHA 3203-11 2MASS J19563154+3106201 Gaia DR2 2033552326189963648
AP J19563154+3106201 Hen 3-1805 TIC 87817236 Gaia DR3 2033552326189963648
CSI+30-19546 IRAS 19545+3058 UCAC2 42814833 Gaia DR1 2033552321857599744
EM* MWC 623 JP11 5217 V* V2028 Cyg

References (81 between 1850 and 2026) (Total 81)
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 : 4    Distance : 1    Fe/H : 3    Plx : 3    PM : 2    SpT : 2   

   

External archives :

Data at NED - NASA/IPAC Extragalactic Database : EM* MWC 623

Link by name to the catalogue in VizieR :

TYC 2669-4333-1 ALS 10651 AP J19563154+3106201 GSC 02669-04333 IRAS 19545+3058
LS II +30 8 2MASS J19563154+3106201 UCAC2 42814833 V* V2028 Cyg Gaia DR2 2033552326189963648
Gaia DR3 2033552326189963648 Gaia DR1 2033552321857599744

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