HD 240121-An ACV variable showing anti-phase variations of the
B and V light curves

J 2017

HD 240121-An ACV variable showing anti-phase variations of the B and V light curves

GROEBEL, Rainer, Stefan HUEMMERICH, Ernst PAUNZEN a Klaus BERNHARD

Základní údaje

Originální název

HD 240121-An ACV variable showing anti-phase variations of the B and V light curves

Autoři

GROEBEL, Rainer (276 Německo), Stefan HUEMMERICH (276 Německo), Ernst PAUNZEN (40 Rakousko, domácí) a Klaus BERNHARD (40 Rakousko)

Vydání

New Astronomy, AMSTERDAM, ELSEVIER SCIENCE BV, 2017, 1384-1076

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10308 Astronomy

Stát vydavatele

Nizozemské království

Utajení

není předmětem státního či obchodního tajemství

Impakt faktor

Impact factor: 0.920

Kód RIV

RIV/00216224:14310/17:00096197

Organizační jednotka

Přírodovědecká fakulta

DOI

http://dx.doi.org/10.1016/j.newast.2016.07.012

UT WoS

000384387500013

Klíčová slova anglicky

Stars: chemically peculiar; Stars: variables: ACV; Stars: individual: HD 240121; NSV 25977

Štítky

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 13. 11. 2018 11:17, doc. Ernst Paunzen, Dr.rer.nat

Anotace

V originále

The variability of HD 240121 = BD+59 2602 was first suspected by Sarg and Wramdemark (1970) and later confirmed by Grobel R. (1992a,b). Because of the observed anti-phase variations of the B and V light curves, the latter author tentatively suggested an ACV type. Apart from its inclusion in the catalog of New Suspected Variables (NSV 25977), no further investigations of the star have been published. HD 240121 was included into our target list of ACV candidates and investigated in order to determine the reason for the observed brightness variations. All available information on HD 240121 were collected via an exhaustive data mining procedure. Data from Grobel (1992a,b) were re-analysed and photometric observations from the NSVS and Hipparcos archives were procured and investigated. Line-of-sight reddening and stellar parameters were calculated from archival photometric data. HD 240121 is a young, late B-type CP2 star of the silicon subgroup. The observed period, amplitude of light variations and variability pattern (anti-phase variations) are typical of ACV variables. The occurrence of anti-phase variations of the B and V light curves is rarely observed and points to the existence of a null wavelength in the visual spectrum. We therefore strongly encourage further multi-colour photometric observations of this star. (C) 2016 Elsevier B.V. All rights reserved.

Návaznosti

3SGA5916, interní kód MU

Název: Hvězdy a hvězdokupy v Magellanových mračnech (Akronym: Webda MaC)

Investor: Jihomoravský kraj, Hvězdy a hvězdokupy v Magellanových mračnech, Granty pro zahraniční vědce

7AMB17AT030, projekt VaV

Název: Analýza hvězd se skvrnami pomocí kvalitních pozorovacích dat

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, Analýza hvězd se skvrnami pomocí kvalitních pozorovacích dat

Citovat

GROEBEL, Rainer, Stefan HUEMMERICH, Ernst PAUNZEN a Klaus BERNHARD. HD 240121-An ACV variable showing anti-phase variations of the B and V light curves. New Astronomy. AMSTERDAM: ELSEVIER SCIENCE BV, 2017, roč. 50, January, s. 104-108. ISSN 1384-1076. Dostupné z: https://dx.doi.org/10.1016/j.newast.2016.07.012.

@article{1373408,
   author = {Groebel, Rainer and Huemmerich, Stefan and Paunzen, Ernst and Bernhard, Klaus},
   article_location = {AMSTERDAM},
   article_number = {January},
   doi = {http://dx.doi.org/10.1016/j.newast.2016.07.012},
   keywords = {Stars: chemically peculiar; Stars: variables: ACV; Stars: individual: HD 240121; NSV 25977},
   language = {eng},
   issn = {1384-1076},
   journal = {New Astronomy},
   title = {HD 240121-An ACV variable showing anti-phase variations of the B and V light curves},
   volume = {50},
   year = {2017}
}

TY  - JOUR
ID  - 1373408
AU  - Groebel, Rainer - Huemmerich, Stefan - Paunzen, Ernst - Bernhard, Klaus
PY  - 2017
TI  - HD 240121-An ACV variable showing anti-phase variations of the B and V light curves
JF  - New Astronomy
VL  - 50
IS  - January
SP  - 104-108
EP  - 104-108
PB  - ELSEVIER SCIENCE BV
SN  - 13841076
KW  - Stars: chemically peculiar
KW  - Stars: variables: ACV
KW  - Stars: individual: HD 240121
KW  - NSV 25977
N2  - The variability of HD 240121 = BD+59 2602 was first suspected by Sarg and Wramdemark (1970) and later confirmed by Grobel R. (1992a,b). Because of the observed anti-phase variations of the B and V light curves, the latter author tentatively suggested an ACV type. Apart from its inclusion in the catalog of New Suspected Variables (NSV 25977), no further investigations of the star have been published. HD 240121 was included into our target list of ACV candidates and investigated in order to determine the reason for the observed brightness variations. All available information on HD 240121 were collected via an exhaustive data mining procedure. Data from Grobel (1992a,b) were re-analysed and photometric observations from the NSVS and Hipparcos archives were procured and investigated. Line-of-sight reddening and stellar parameters were calculated from archival photometric data. HD 240121 is a young, late B-type CP2 star of the silicon subgroup. The observed period, amplitude of light variations and variability pattern (anti-phase variations) are typical of ACV variables. The occurrence of anti-phase variations of the B and V light curves is rarely observed and points to the existence of a null wavelength in the visual spectrum. We therefore strongly encourage further multi-colour photometric observations of this star. (C) 2016 Elsevier B.V. All rights reserved.
ER  -

GROEBEL, Rainer, Stefan HUEMMERICH, Ernst PAUNZEN a Klaus BERNHARD. HD 240121-An ACV variable showing anti-phase variations of the B and V light curves. \textit{New Astronomy}. AMSTERDAM: ELSEVIER SCIENCE BV, 2017, roč.~50, January, s.~104-108. ISSN~1384-1076. Dostupné z: https://dx.doi.org/10.1016/j.newast.2016.07.012.

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