2020RNAAS...4..135M

Query : 2020RNAAS...4..135M

2020RNAAS...4..135M - Research Notes of the AAS, 4, 135 (2020/August-0)

The Large Flux Variations of 17 Com A as Recorded by FUSE.

MONIER R.

Abstract (from CDS):

Inspection of archival FUSE spectra of the Ap star 17 Com A (HD 108662) reveals large flux variations from 905 to 1187 Å over the 5.0808 days rotational period. These variations are of larger amplitude than those observed in the ultraviolet range with IUE from 1200 to 2000 Å. At 1161 Å, where the flux reaches a maximum, the variation of flux with rotational phase shows a double-wave structure similar to that of the Transiting Exoplanet Survey Satellite lightcurve. These large flux variations are most likely caused by the passage of spots or belts of overabundant elements in the line of sight as the star rotates The FUSE spectrum of 17 Com A contains mostly blends of low-excitation lines of Mn II, Cr II and Fe II and interesting lines of C I, C III, P II, S II and Cl I.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Chemically peculiar stars

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 * 17 Com a2* 12 28 54.7022406648 +25 54 46.265813136   5.208 5.236     B9VCrEu 288 0

Query : 2020RNAAS...4..135M

Basic data :
* 17 Com -- alpha2 CVn Variable
Other object types: otypes_help 		a2* (), * (2020A&A,*,...), ** (ADS,CCDM,...), Em* (2023ApJS), Pe* (2022ApJS), V* (V*), NIR (2MASS), Opt (LAMOST)
ICRS coord. (ep=J2000) : 		12 28 54.7022406648 +25 54 46.265813136 (Optical) [ 0.1717 0.2555 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		12 26 24.9632471166 +26 11 21.806849666 [ 0.1717 0.2555 90 ]
Gal coord. (ep=J2000) : 		225.2237310514996 +84.8170807801829 [ 0.1717 0.2555 90 ]
Proper motions mas/yr : 		-23.071 -15.110 [0.165 0.300 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) 0.55 [0.44] / z(spectroscopic) 0.000002 [0.000001] / cz 0.55 [0.44]
   (Opt) A 2023ApJS..264...17Z
Parallaxes (mas): 		12.9991 [0.3721] A 2020yCat.1350....0G
Spectral type: 		B9VCrEu D 2020A&A...640A..40H
Fluxes (6) :
B 5.208 [0.014] D 2000A&A...355L..27H
V 5.236 [0.009] D 2000A&A...355L..27H
G 5.241875 [0.003205] C 2022yCat.1355....0G
J 5.221 [0.020] C 2003yCat.2246....0C
H 5.297 [0.034] C 2003yCat.2246....0C
K 5.289 [0.017] C 2003yCat.2246....0C
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Identifiers (47) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

* 17 Com GCRV 7503 N30 2886 UBV M 41712
* 17 Com A GEN# +5.21110146 NAME ** STFA 21 uvby98 521110146
ADS 8568 A GSC 01989-03206 PLX 2876 V* AI Com
AG+26 1277 HD 108662 PLX 2876.00 WDS J12289+2555A
AP J12285470+2554463 HGAM 616 PPM 101928 WEB 10838
BD+26 2354 HIC 60904 Renson 31550 YPAC 513
CCDM J12289+2554A HIP 60904 ROT 3939 YZ 26 6133
Cl* Melotte 111 AV 1822 HR 4752 SAO 82330 [HFE83] 878
Cl* Melotte 111 BOU 42 IDS 12239+2628 A SKY# 23345 [SS59] I 291
Cl Melotte 111 146 JP11 5071 TIC 393808105 Gaia DR3 3960724252307532672
Cl Melotte 111 1464 LAMOST J122855.36+255446.3 TYC 1989-3206-1 Gaia DR2 3960724252307181056
GC 17012 2MASS J12285470+2554463 UBV 11213

References (288 between 1850 and 2026) (Total 288)
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 : 20    Diameter : 1    Distance : 3    Rot : 8    Fe/H : 6    Plx : 5    PM : 7    SpT : 12   

   

Observing logs
IUE : 19   

   

External archives :

Link by name to the catalogue in VizieR :

AG+26 1277 AP J12285470+2554463 BD+26 2354 CCDM J12289+2554A GSC 01989-03206
HD 108662 HIC 60904 HIP 60904 HR 4752 2MASS J12285470+2554463
PLX 2876 PPM 101928 SAO 82330 TYC 1989-3206-1 uvby98 521110146
V* AI Com WDS J12289+2555A Gaia DR3 3960724252307532672 Gaia DR2 3960724252307181056

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