| Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
|---|---|
| Constellation | Apus |
| Right ascension | 14h 06m 54.82s [2] |
| Declination | −71° 22′ 16.7″ [2] |
| Apparent magnitude (V) | 10.8 to 12.0 [3] |
| Characteristics | |
| U−B color index | +0.5 - +1.5 [4] |
| B−V color index | +1.5 - +1.75 [4] |
| Variable type | RV Tau? [3] |
| Astrometry | |
| Proper motion (μ) |
RA: −3.841
[2]
mas/
yr Dec.: −1.604 [2] mas/ yr |
| Parallax (π) | 0.3135 ± 0.0131 mas [2] |
| Distance | 10,400 ± 400
ly (3,200 ± 100 pc) |
| Details | |
| Mass | 3.2 [5] M☉ |
| Radius | 27.6 [2] R☉ |
| Luminosity | 405 [2] L☉ |
| Surface gravity (log g) | 2.12 [2] cgs |
| Temperature | 4,579 [2] K |
| Metallicity [Fe/H] | −0.76 [5] dex |
| Age | 11 [6] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Z Apodis (Z Aps) is a variable star in the constellation of Apus. It has an apparent visual magnitude which varies between 10.8 and 12.8, [3] over a period of 39.37 days. [3] Although described in the General Catalogue of Variable Stars as a cataclysmic variable star, it appears that it is a pulsating variable star, [4] and has been classed as an RV Tauri variable star, type RVa. [3] Other sources classify it is a type II ( W Virginis) Cepheid. [7]
References
- ^ "ASAS-SN Variable Stars Database". ASAS-SN Variable Stars Database. ASAS-SN. Retrieved 6 January 2022.
- ^ a b c d e f g h i Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211. Bibcode: 2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b c d e Watson, Christopher (4 January 2010). "Z Apodis". The International Variable Star Index. American Association of Variable Star Observers. Retrieved 20 Nov 2022.
- ^ a b c Marino, B. F.; Walker, W. S. G. (1991). "Z Apodis is a Pulsating - not a Cataclysmic - Variable Star". Information Bulletin on Variable Stars. 3664: 1. Bibcode: 1991IBVS.3664....1M.
- ^ a b Anders, F.; Khalatyan, A.; Queiroz, A. B. A.; Chiappini, C.; Ardevol, J.; Casamiquela, L.; Figueras, F.; Jimenez-Arranz, O.; Jordi, C.; Monguio, M.; Romero-Gomez, M.; Altamirano, D.; Antoja, T.; Assaad, R.; Cantat-Gaudin, T.; Castro-Ginard, A.; Enke, H.; Girardi, L.; Guiglion, G.; Khan, S.; Luri, X.; Miglio, A.; Minchev, I.; Ramos, P.; Santiago, B. X.; Steinmetz, M. (2022). "VizieR Online Data Catalog: StarHorse2, Gaia EDR3 photo-astrometric distances (Anders+, 2022)". Vizier Online Data Catalog. Bibcode: 2022yCat.1354....0A.
- ^ Fouesneau, M.; Andrae, R.; Dharmawardena, T.; Rybizki, J.; Bailer-Jones, C. A. L.; Demleitner, M. (2022). "Astrophysical parameters from Gaia DR2, 2MASS, and AllWISE". Astronomy and Astrophysics. 662: A125. arXiv: 2201.03252. Bibcode: 2022A&A...662A.125F. doi: 10.1051/0004-6361/202141828. S2CID 245837778.
- ^ Ripepi, V.; Molinaro, R.; Musella, I.; Marconi, M.; Leccia, S.; Eyer, L. (2019). "Reclassification of Cepheids in the Gaia Data Release 2. Period-luminosity and period-Wesenheit relations in the Gaia passbands". Astronomy and Astrophysics. 625: 625. arXiv: 1810.10486. Bibcode: 2019A&A...625A..14R. doi: 10.1051/0004-6361/201834506. S2CID 119338608.
 | This variable star–related article is a stub. You can help Wikipedia by expanding it. |
| Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
|---|---|
| Constellation | Apus |
| Right ascension | 14h 06m 54.82s [2] |
| Declination | −71° 22′ 16.7″ [2] |
| Apparent magnitude (V) | 10.8 to 12.0 [3] |
| Characteristics | |
| U−B color index | +0.5 - +1.5 [4] |
| B−V color index | +1.5 - +1.75 [4] |
| Variable type | RV Tau? [3] |
| Astrometry | |
| Proper motion (μ) |
RA: −3.841
[2]
mas/
yr Dec.: −1.604 [2] mas/ yr |
| Parallax (π) | 0.3135 ± 0.0131 mas [2] |
| Distance | 10,400 ± 400
ly (3,200 ± 100 pc) |
| Details | |
| Mass | 3.2 [5] M☉ |
| Radius | 27.6 [2] R☉ |
| Luminosity | 405 [2] L☉ |
| Surface gravity (log g) | 2.12 [2] cgs |
| Temperature | 4,579 [2] K |
| Metallicity [Fe/H] | −0.76 [5] dex |
| Age | 11 [6] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Z Apodis (Z Aps) is a variable star in the constellation of Apus. It has an apparent visual magnitude which varies between 10.8 and 12.8, [3] over a period of 39.37 days. [3] Although described in the General Catalogue of Variable Stars as a cataclysmic variable star, it appears that it is a pulsating variable star, [4] and has been classed as an RV Tauri variable star, type RVa. [3] Other sources classify it is a type II ( W Virginis) Cepheid. [7]
References
- ^ "ASAS-SN Variable Stars Database". ASAS-SN Variable Stars Database. ASAS-SN. Retrieved 6 January 2022.
- ^ a b c d e f g h i Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211. Bibcode: 2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b c d e Watson, Christopher (4 January 2010). "Z Apodis". The International Variable Star Index. American Association of Variable Star Observers. Retrieved 20 Nov 2022.
- ^ a b c Marino, B. F.; Walker, W. S. G. (1991). "Z Apodis is a Pulsating - not a Cataclysmic - Variable Star". Information Bulletin on Variable Stars. 3664: 1. Bibcode: 1991IBVS.3664....1M.
- ^ a b Anders, F.; Khalatyan, A.; Queiroz, A. B. A.; Chiappini, C.; Ardevol, J.; Casamiquela, L.; Figueras, F.; Jimenez-Arranz, O.; Jordi, C.; Monguio, M.; Romero-Gomez, M.; Altamirano, D.; Antoja, T.; Assaad, R.; Cantat-Gaudin, T.; Castro-Ginard, A.; Enke, H.; Girardi, L.; Guiglion, G.; Khan, S.; Luri, X.; Miglio, A.; Minchev, I.; Ramos, P.; Santiago, B. X.; Steinmetz, M. (2022). "VizieR Online Data Catalog: StarHorse2, Gaia EDR3 photo-astrometric distances (Anders+, 2022)". Vizier Online Data Catalog. Bibcode: 2022yCat.1354....0A.
- ^ Fouesneau, M.; Andrae, R.; Dharmawardena, T.; Rybizki, J.; Bailer-Jones, C. A. L.; Demleitner, M. (2022). "Astrophysical parameters from Gaia DR2, 2MASS, and AllWISE". Astronomy and Astrophysics. 662: A125. arXiv: 2201.03252. Bibcode: 2022A&A...662A.125F. doi: 10.1051/0004-6361/202141828. S2CID 245837778.
- ^ Ripepi, V.; Molinaro, R.; Musella, I.; Marconi, M.; Leccia, S.; Eyer, L. (2019). "Reclassification of Cepheids in the Gaia Data Release 2. Period-luminosity and period-Wesenheit relations in the Gaia passbands". Astronomy and Astrophysics. 625: 625. arXiv: 1810.10486. Bibcode: 2019A&A...625A..14R. doi: 10.1051/0004-6361/201834506. S2CID 119338608.
|
| This variable star–related article is a stub. You can help Wikipedia by expanding it. |