PM 1-322: New variable planetary nebula

J 2023

PM 1-322: New variable planetary nebula

PAUNZEN, Ernst; K. BERNHARD; J. BUDAJ; F. -J. HAMBSCH; S. HÜMMERICH et. al.

Základní údaje

Originální název

PM 1-322: New variable planetary nebula

Autoři

PAUNZEN, Ernst (40 Rakousko, domácí); K. BERNHARD; J. BUDAJ; F. -J. HAMBSCH; S. HÜMMERICH; D. JONES a Jiří KRTIČKA (203 Česká republika, domácí)

Vydání

Astronomy and Astrophysics, EDP Sciences, 2023, 0004-6361

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10308 Astronomy

Stát vydavatele

Francie

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 5.400

Kód RIV

RIV/00216224:14310/23:00133037

Organizační jednotka

Přírodovědecká fakulta

DOI

http://dx.doi.org/10.1051/0004-6361/202346162

UT WoS

001046037700001

EID Scopus

2-s2.0-85168717733

Klíčová slova anglicky

stars; variables; general; winds; outflows; AGB and post-AGB; binaries; symbiotic

Štítky

rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 16. 1. 2024 09:35, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

Context Spectra of planetary nebulae (PNe) are characterised by strong forbidden emission lines and often also by an infrared (IR) excess. A few PNe show dust obscuration events and/or harbour long-period binaries. Some post-asymptotic giant branch stars, symbiotic stars, or B[e] stars may feature similar characteristics. Recently, dust clouds eclipsing white dwarfs were also detected. Aims We report the discovery of an object with a very peculiar variability pattern that bears signatures compatible with the above-mentioned classes of objects. The object is ZTFJ201451.59+120353.4 and identifies with PM 1-322. Methods The object was discovered in Zwicky Transient Facility archival data and investigated with historical and newly obtained photometric and spectroscopic observations. Results The ZTF r and g data show a one magnitude deep, eclipse-like event with a duration of about half a year that occurred in 2022. The variability pattern of the star is further characterised by several dimming events in the optical region that are accompanied by simultaneous brightenings in the red and IR regions. Apart from that, two fast eruption-like events were recorded in ZTF r data. Archival data from WISE indicate long-term variability with a possible period of 6 or 12 yr. Our follow-up time series photometry reveals a stochastic short-term variability with an amplitude of about 0.1 mag on a timescale of about one hour. The spectral energy distribution is dominated by IR radiation. Our high-resolution spectroscopy shows strong forbidden emission lines from highly ionised species and symmetric double-peaked emission in H & alpha;, which is very different from what is seen in earlier spectra obtained in 2007. Conclusions Several explanatory scenarios are presented. Our most likely interpretation is that our target object involves a hot central star surrounded by gaseous and dusty disks, an extended nebula, and a possible companion star. Further observations are required to shed more light on the true nature of this enigmatic object.

Návaznosti

98507, interní kód MU

Název: European Collaborating Astronomer ProjectS: Espana-Czechia-Slovakia (Akronym: ECAPS:E-C-S)

Investor: Evropská unie, European Collaborating Astronomer ProjectS: Espana-Czechia-Slovakia, Strategická partnerství v oblasti vzdělávání, odborné přípravy a mládeže

Citovat

PAUNZEN, Ernst; K. BERNHARD; J. BUDAJ; F. -J. HAMBSCH; S. HÜMMERICH; D. JONES a Jiří KRTIČKA. PM 1-322: New variable planetary nebula. Astronomy and Astrophysics. EDP Sciences, 2023, roč. 676, August, s. 1-10. ISSN 0004-6361. Dostupné z: https://dx.doi.org/10.1051/0004-6361/202346162.

@article{2361479,
   author = {Paunzen, Ernst and Bernhard, K. and Budaj, J. and Hambsch, F. andJ. and Hümmerich, S. and Jones, D. and Krtička, Jiří},
   article_number = {August},
   doi = {http://dx.doi.org/10.1051/0004-6361/202346162},
   keywords = {stars; variables; general; winds; outflows; AGB and post-AGB; binaries; symbiotic},
   language = {eng},
   issn = {0004-6361},
   journal = {Astronomy and Astrophysics},
   title = {PM 1-322: New variable planetary nebula},
   url = {https://doi.org/10.1051/0004-6361/202346162},
   volume = {676},
   year = {2023}
}

TY  - JOUR
ID  - 2361479
AU  - Paunzen, Ernst - Bernhard, K. - Budaj, J. - Hambsch, F. -J. - Hümmerich, S. - Jones, D. - Krtička, Jiří
PY  - 2023
TI  - PM 1-322: New variable planetary nebula
JF  - Astronomy and Astrophysics
VL  - 676
IS  - August
SP  - 1-10
EP  - 1-10
PB  - EDP Sciences
SN  - 00046361
KW  - stars
KW  - variables
KW  - general
KW  - winds
KW  - outflows
KW  - AGB and post-AGB
KW  - binaries
KW  - symbiotic
UR  - https://doi.org/10.1051/0004-6361/202346162
N2  - Context Spectra of planetary nebulae (PNe) are characterised by strong forbidden emission lines and often also by an infrared (IR) excess. A few PNe show dust obscuration events and/or harbour long-period binaries. Some post-asymptotic giant branch stars, symbiotic stars, or B[e] stars may feature similar characteristics. Recently, dust clouds eclipsing white dwarfs were also detected. Aims We report the discovery of an object with a very peculiar variability pattern that bears signatures compatible with the above-mentioned classes of objects. The object is ZTFJ201451.59+120353.4 and identifies with PM 1-322. Methods The object was discovered in Zwicky Transient Facility archival data and investigated with historical and newly obtained photometric and spectroscopic observations. Results The ZTF r and g data show a one magnitude deep, eclipse-like event with a duration of about half a year that occurred in 2022. The variability pattern of the star is further characterised by several dimming events in the optical region that are accompanied by simultaneous brightenings in the red and IR regions. Apart from that, two fast eruption-like events were recorded in ZTF r data. Archival data from WISE indicate long-term variability with a possible period of 6 or 12 yr. Our follow-up time series photometry reveals a stochastic short-term variability with an amplitude of about 0.1 mag on a timescale of about one hour. The spectral energy distribution is dominated by IR radiation. Our high-resolution spectroscopy shows strong forbidden emission lines from highly ionised species and symmetric double-peaked emission in H & alpha;, which is very different from what is seen in earlier spectra obtained in 2007. Conclusions Several explanatory scenarios are presented. Our most likely interpretation is that our target object involves a hot central star surrounded by gaseous and dusty disks, an extended nebula, and a possible companion star. Further observations are required to shed more light on the true nature of this enigmatic object.
ER  -

PAUNZEN, Ernst; K. BERNHARD; J. BUDAJ; F. -J. HAMBSCH; S. HÜMMERICH; D. JONES a Jiří KRTIČKA. PM 1-322: New variable planetary nebula. \textit{Astronomy and Astrophysics}. EDP Sciences, 2023, roč.~676, August, s.~1-10. ISSN~0004-6361. Dostupné z: https://dx.doi.org/10.1051/0004-6361/202346162.

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