Summary
Gomez's Hamburger, also known as IRAS 18059-3211, is believed to be a young star surrounded by a protoplanetary disk.[4] It was initially identified as a planetary nebula, and its distance was estimated to be approximately 6500 light-years away from Earth.[6] However, recent results suggest that this object is a young star surrounded by a protoplanetary disk, at a distance of about 900 light-years away.[4][7]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Sagittarius |
| Right ascension | 18h 09m 13.40s[1] |
| Declination | −32° 10′ 50.0″[1] |
| Apparent magnitude (V) | 14.4 |
| Characteristics | |
| Spectral type | A0III:[2] |
| Astrometry | |
| Distance | 250±50[3] pc |
| Details | |
| Mass | 2.5±0.5[3] M☉ |
| Luminosity | ~15[4] L☉ |
| Temperature | ~10,000[5] K |
| Other designations | |
IRAS 18059-3211 | |
| Database references | |
| SIMBAD | data |
It was discovered in 1985 on sky photographs obtained by Arturo Gómez, support technical staff at the Cerro Tololo Inter-American Observatory near Vicuña, Chile.[8] The photos suggested that there was a dark band across the object, but its exact structure was difficult to determine because of the atmospheric turbulence that hampers all images taken from the ground. The star itself has a surface temperature of approximately 10,000 K.
The "buns" are light reflecting off dust. A disk of dust seen nearly exactly edge-on obscures the star and produces the dark band in the middle, the "burger".[4] It has a dim visual magnitude of 14.4.
Possible protoplanet edit
An emission at the southern part of the disk seen in carbon monoxide imaging, as well as in mid-infrared imaging, was interpreted as a protoplanet candidate. This candidate would have a mass of 0.8-11.4 MJ.[9] Protoplanetary disk can however form disk fragments that are gravitationally bound and can mimic protoplanets. In the case of GoHam b it is not clear if it is a protoplanet or just a disk fragment.[10]
References edit
- ^ a b Cutri, Roc M.; et al. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". CDS/ADC Collection of Electronic Catalogues. 2246: II/246. Bibcode:2003yCat.2246....0C.
- ^ Ruiz, Maria Teresa; Blanco, Victor; Maza, Jose; Heathcote, Steve; Phillips, Andrew; Kawara, Kimiaki; Anguita, Claudio; Hamuy, Mario; Gomez, Arturo (1987). "IRAS 18059-3211: Optically Known as Gomez's Hamburger". The Astrophysical Journal. 316: L21. Bibcode:1987ApJ...316L..21R. doi:10.1086/184884.
- ^ a b Teague, Richard; Jankovic, Marija R.; Haworth, Thomas J.; Qi, Chunhua; Ilee, John D. (2020). "A three-dimensional view of Gomez's hamburger". Monthly Notices of the Royal Astronomical Society. 495 (1): 451. arXiv:2003.02061. Bibcode:2020MNRAS.495..451T. doi:10.1093/mnras/staa1167.
- ^ a b c d Bujarrabal, V.; Young, K.; Castro-Carrizo, A. (2009). "The physical conditions in Gomez's Hamburger (IRAS 18059-3211), a pre-MS rotating disk". Astronomy and Astrophysics. 500 (3): 1077. arXiv:0901.4256. Bibcode:2009A&A...500.1077B. doi:10.1051/0004-6361/200811233. S2CID 14665434.
- ^ Bujarrabal, V.; Young, K.; Fong, D. (2008). "Gomez's Hamburger (IRAS 18059-3211): A pre main-sequence A-type star". Astronomy and Astrophysics. 483 (3): 839–845. arXiv:0803.1438. Bibcode:2008A&A...483..839B. doi:10.1051/0004-6361:20079273. S2CID 5086449.
- ^ "Hubble Astronomers Feast on an Interstellar Hamburger". Space Telescope Science Institute. August 1, 2002. Retrieved 2008-12-28.
- ^ Wood, K.; Whitney, B.A.; Robitaille, T.; Draine, B.T. (2008). "Emission from Very Small Grains and PAH Molecules in Monte Carlo Radiation Transfer Codes: Application to the Edge-On Disk of Gomez's Hamburger". Astrophysical Journal. 688 (2): 1118–1123. arXiv:0807.2398. Bibcode:2008ApJ...688.1118W. doi:10.1086/592185. S2CID 14444841.
- ^ "Gomez's Hamburger".
- ^ Berné, O.; Fuente, A.; Pantin, E.; Bujarrabal, V.; Baruteau, C.; Pilleri, P.; Habart, E.; Ménard, F.; Cernicharo, J.; Tielens, A. G. G. M.; Joblin, C. (2015-06-01). "Very Large Telescope observations of Gomez's Hamburger: Insights into a young protoplanet candidate". Astronomy and Astrophysics. 578: L8. arXiv:1504.02735. doi:10.1051/0004-6361/201526041. ISSN 0004-6361.
- ^ Teague, Richard; Jankovic, Marija R.; Haworth, Thomas J.; Qi, Chunhua; Ilee, John D. (2020-06-01). "A three-dimensional view of Gomez's hamburger". Monthly Notices of the Royal Astronomical Society. 495: 451–459. arXiv:2003.02061. doi:10.1093/mnras/staa1167. ISSN 0035-8711.