1998PASP..110.1428P

Query : 1998PASP..110.1428P

1998PASP..110.1428P - Publ. Astron. Soc. Pac., 110, 1428-1430 (1998/December-0)

Period changes, evolution, and multiperiodicity in the peculiar population II cepheid RU Camelopardalis.

PERCY J.R. and HALE J.

Abstract (from CDS):

We have studied the period change in the peculiar Population II Cepheid RU Cam, which abruptly decreased in amplitude in 1965-1966. The O-C diagram prior to 1965-1966 can best be explained as the superposition of small, random, cycle-to-cycle changes in period, plus a constant linear decrease whose timescale (31,000 yr) is consistent with evolutionary predictions. The O-C diagram after 1965-1966 can best be explained as the superposition of much larger random, cycle-to-cycle changes (which mask the evolutionary changes), plus wavelike changes in O-C on a timescale of 10-20 periods. These–and the variations in the amplitude of the star that occur on the same timescale–may be due to multiperiodicity.

Abstract Copyright: ∼

Journal keyword(s): Stars: Variables: Cepheids - Stars: AGB and Post-AGB - Stars: Evolution - Stars: Individual: Constellation Name: RU Camelopardalis - Stars: Peculiar - Stars: Population II

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* RU Cam C* 07 21 44.1179567520 +69 40 14.724927696   9.95 8.60 8.84   C0,1_CH4 147 1

Query : 1998PASP..110.1428P

Basic data :
V* RU Cam -- Carbon Star
Other object types: otypes_help 		* (HD,AG,...), C* (1972AnTok,C*,...), V* (AN,V*,...), WV* (2012A&A), NIR (2MASS)
ICRS coord. (ep=J2000) : 		07 21 44.1179567520 +69 40 14.724927696 (Optical) [ 0.0106 0.0160 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		07 16 20.2547554074 +69 45 53.559914471 [ 0.0106 0.0160 90 ]
Gal coord. (ep=J2000) : 		145.8722378200533 +27.9264088022990 [ 0.0106 0.0160 90 ]
Proper motions mas/yr : 		1.005 -1.502 [0.014 0.019 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) -19.97 [0.38] / z(spectroscopic) -0.000067 [0.000001] / cz -19.97 [0.38]
   (Opt) A 2018yCat.1345....0G
Parallaxes (mas): 		0.7284 [0.0203] A 2020yCat.1350....0G
Spectral type: 		C0,1_CH4 C 1972AnTok..13..169Y
Fluxes (7) :
B 9.95 [0.99] D 2012yCat.1322....0Z
V 8.60 [0.99] D 2012yCat.1322....0Z
R 8.84 [0.09] E 2012yCat.1322....0Z
G 8.300211 [0.003260] C 2020yCat.1350....0G
J 6.721 [0.018] C 2003yCat.2246....0C
H 6.319 [0.024] C 2003yCat.2246....0C
K 6.154 [0.017] C 2003yCat.2246....0C
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Identifiers (31) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

HD 56167 DO 31401 PPM 16154 WEB 7107
AG+69 330 GCRV 4837 SAO 14157 [LFO93] 0716+69
AGKR 6570 GEN# +1.00056167 TIC 147795605 [V58] 25
AN 2.1907 GSC 04364-00097 TYC 4364-97-1 AAVSO 0710+69
BD+69 417 HIC 35681 UBV 21581 Gaia DR3 1108841778508957056
C* 699 HIP 35681 UCAC4 799-016895 Gaia DR1 1108841774211669504
CGCS 6228 LEE 292 uvby98 100056167 Gaia DR2 1108841778508957056
CGCS 1622 2MASS J07214412+6940147 V* RU Cam

References (147 between 1850 and 2026) (Total 147)
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 : 11    Distance : 2    Plx : 5    PM : 6    SpT : 10   

   

Observing logs
IUE : 9   

   

External archives :

Link by name to the catalogue in VizieR :

HD 56167 AG+69 330 BD+69 417 CGCS 6228 CGCS 1622
DO 31401 GSC 04364-00097 HIC 35681 HIP 35681 2MASS J07214412+6940147
PPM 16154 SAO 14157 TYC 4364-97-1 UCAC4 799-016895 uvby98 100056167
V* RU Cam Gaia DR3 1108841778508957056 Gaia DR1 1108841774211669504 Gaia DR2 1108841778508957056

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