2020MNRAS.495L.135J

Query : 2020MNRAS.495L.135J

2020MNRAS.495L.135J - Mon. Not. R. Astron. Soc., 495, L135-L138 (2020)

TESS photometry of extreme helium stars PV Tel and V821 Cen.

JEFFERY C.S., BARENTSEN G. and HANDLER G.

Abstract (from CDS):

PV Tel variables are extreme helium (EHe) stars known to be intrinsic light and velocity variable on characteristic time-scales of 0.1-25 d. With two exceptions, they are best described as irregular. Light curves have invariably been obtained from single-site terrestrial observatories. We present Transiting Exoplanet Survey Satellite observations of two bright EHe stars, Popper's star (V821 Cen) and Thackeray's star (PV Tel). PV Tel is variable on time-scales previously reported. V821 Cen is proven to be variable for the first time. Neither light curve shows any evidence of underlying regularity. Implications are considered.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: chemically peculiar - stars: early-type - stars: individual: (PV Tel, V821 Cen) - stars: supergiants - stars: variables: general

Simbad objects: 11

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Number of rows : 11
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* DN Leo Pu* 10 38 55.2343433712 +10 03 48.486337812   9.76 9.93     Bp 150 0
2 * 93 Leo RS* 11 47 59.13595 +20 13 08.1500   5.07 4.52     F8III+A6III 230 1
3 V* W Vir WV* 13 26 01.9928807928 -03 22 43.431062880   10.33 9.46 9.29 9.393 F2Ibe 320 0
4 V* BX Cir Pu* 14 01 36.4829811264 -66 09 56.163698820 11.79 12.62 12.58 12.75   OB+ 69 0
5 V* V821 Cen Pu* 14 14 58.6292612424 -46 17 19.294106424 9.09 9.89 9.98     (B)p 145 0
6 HD 144941 pA* 16 09 24.5513020968 -27 13 38.184011148 9.45 10.17 10.02     B8 96 1
7 V* V652 Her pA* 16 48 04.6934854032 +13 15 42.420402252   10.31 10.51     ~ 147 0
8 HD 160641 HS* 17 41 51.5791786632 -17 53 48.462200880 9.15 10.01 9.85 10.08 9.59 sdOC9.5II-IIIHe40 128 0
9 V* PV Tel s?b 18 23 14.6623123440 -56 37 44.138664012 8.60 9.20 9.30     B5?I?pec 130 0
10 V* V348 Sgr pA* 18 40 19.9290428808 -22 54 29.308207716   12.1       B0/1?I?e 192 0
11 V* FQ Aqr Pu* 20 51 21.3360113136 +02 18 46.360439064 9.18 9.62 9.52     F 71 0

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