User:Meli thev
I was an astronomy volunteer and I am a co-author of multiple publications. My research area involved brown dwarfs, infrared transient events, debris around white dwarfs and occasionally active supermassive black holes.
Community Science
[edit]In 2018 to 2021 I was doing volunteer work for various projects on Zooniverse. I began with the project Higgs Hunters, but then I became more focused on astronomy and became a moderator for the Milky Way Project.[1] I then made my first discoveries, most notably I did co-discover the infrared excess around the white dwarf star LSPM J0207+3331.[2][3]
I also discovered a number of brown dwarfs in the backyard worlds project. I co-disovered several M, L, T and Y-dwarfs. These include:
- the Y-dwarf candidate CWISE J1531−3306[4] (other co-discovers: Samuel J. Goodman & Arttu Sainio)
- the L-type binary CWISE J0146−0508AB[5] (other co-discovers: Nikolaj Stevnbak, Sam Goodman, Dan Caselden, and Frank Kiwy)
- I co-discovered 3 M+T binaries: L26−16AB, UCAC4 307−069397AB & LP 81−30AB (see other co-discoverers in the citation).[6]
I also worked on transient events seen in mid-infrared by the NEOWISE mission, mostly supernovae. This includes the identification of ASASSN−18ap as a possible Tidal Disruption Event,[7][8] which was later studied in detail by Wang et al.[9] Another variable object related discovery is the discovery of a bright explosion around IRAS 07572−3100, accompanied by the appearance of a new nebula in the optical and near-infrared.[10] This transient was later independently discovered by another team and observed by Lynne Hillenbrand with the Keck Observatory.[11]
I also identified dusty tails coming from low-mass stars in several star-forming regions, which is seen as a sign of photoevaporation.[12][13] I am one of the galaxy zoo volunteers that did actively search for Voorwerpjes.[14]
List of planetary-mass objects
[edit]I maintain a list of free-floating planetary-mass objects, which I collected from the literature. These are objects with a mass below 13 jupiter masses and are not orbiting a star, brown dwarf or stellar remnant. I called the website that hosts this list "Isolated Planets Archive" and it contains over 400 objects and candidates.[15]
Gallery research
[edit]-
Artist's impression of LSPM J0207+3331, which I helped to discover
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Variable nebula around the outbursting star IRAS 07572−3100.
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Cometary tails in the Lambda Orionis cluster.
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The L-type binary CWISE J0146−0508AB.
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Mid-infrared light curve of ASASSN−18ap.
Creating images
[edit]I consider it more of a hobby to create images and gifs out of astronomical data and satellite images. Such as an asteroid in front of the crab nebula.[16][17]

NGC objects and other catalogues
[edit]I created images of NGC objects between May 2023 and December 2023. I mostly created images for objects that did not have any images or only had old images from the DSS/DSS2 surveys on wikimedia commons. This way I created more than 1000 images. I also created images for RCW and Barnard catalogues. Sometimes I am working on images for the IC objects. Most images were created with DESI Legacy Imaging Surveys data, but for some I used data from the Hubble Space Telescope. The software I used was mostly SAO Image DS9 and Adobe Photoshop Elements.
Wikipedia edits
[edit]I mostly edit wikipedia pages that already exist. And sometimes I create a new wikipedia article, such as
- the w:Teacup galaxy
- w:Post common envelope binary
- w:W2150AB
- w:V1298 Tauri
- w:List of nearby stellar associations and moving groups
- w:List of Y-dwarfs
- w:CWISE J1055+5443
- w:Wolf 1130
- w:WISEA 1810−1010
- w:IM Lupi
- w:Kojima-1Lb
- w:BW Sculptoris
- w:TESS Hunt for Young and Maturing Exoplanets
- w:SN 2010jl
- w:Extended emission-line region
References
[edit]- ↑ Jayasinghe, Tharindu (2019-09-01). "The Milky Way Project second data release: bubbles and bow shocks". Monthly Notices of the Royal Astronomical Society 488: 1141–1165. DOI:10.1093/mnras/stz1738. ISSN 0035-8711.
- ↑ Debes, John H. (2019-02-19). "A 3 Gyr White Dwarf with Warm Dust Discovered via the Backyard Worlds: Planet 9 Citizen Science Project". The Astrophysical Journal 872 (2): L25. DOI:10.3847/2041-8213/ab0426. ISSN 2041-8213.
- ↑ Garner, Rob (2019-02-19). Citizen Scientist Finds Ancient White Dwarf Star With Puzzling Rings. NASA. Retrieved on 2019-12-27.
- ↑ Kirkpatrick, J. Davy (2021-03-01). "The Field Substellar Mass Function Based on the Full-sky 20 pc Census of 525 L, T, and Y Dwarfs". The Astrophysical Journal Supplement Series 253: 7. DOI:10.3847/1538-4365/abd107. ISSN 0067-0049.
- ↑ Softich, Emma (2022-02-01). "CWISE J014611.20-050850.0AB: The Widest Known Brown Dwarf Binary in the Field". The Astrophysical Journal Letters 926 (2): L12. DOI:10.3847/2041-8213/ac51d8. ISSN 2041-8205.
- ↑ Marocco, Federico (2024-06-01). "Thirteen New M Dwarf + T Dwarf Pairs Identified with WISE/NEOWISE". The Astrophysical Journal 967: 147. DOI:10.3847/1538-4357/ad3f1d. ISSN 0004-637X.
- ↑ Thévenot, Melina (2020-12-01). "Mid-Infrared Detections of SNe II with NEOWISE". Research Notes of the American Astronomical Society 4: 243. DOI:10.3847/2515-5172/abd415. ISSN 2515-5172.
- ↑ Thévenot, Melina (2021-03-01). "Mid-infrared Detections of Type I Supernovae and Unclassified Possible Supernovae with NEOWISE". Research Notes of the American Astronomical Society 5: 58. DOI:10.3847/2515-5172/abf120. ISSN 2515-5172.
- ↑ Wang, Yibo (2024-05-01). "ASASSN-18ap: A Dusty Tidal Disruption Event Candidate with an Early Bump in the Light Curve". The Astrophysical Journal 966: 136. DOI:10.3847/1538-4357/ad2ae4. ISSN 0004-637X.
- ↑ Thévenot, Melina (2020-12-01). "Appearance of a New Nebula in the Constellation Puppis after an Outburst in 2015 around WISEA J075915.26-310844.6". Research Notes of the American Astronomical Society 4: 242. DOI:10.3847/2515-5172/abd40e. ISSN 2515-5172.
- ↑ Hillenbrand, Lynne (2021-02-01). "IRAS 07572-3100 and the New Nebula in Puppis: Outburst from a Young Stellar Object or an Exotic AGB Star Event?". The Astronomer's Telegram 14416: 1.
- ↑ Thévenot, Melina (2019-07-01). "Photoevaporation of Two Proplyds in the Star Cluster Collinder 69 Discovered with Spitzer MIPS". Research Notes of the American Astronomical Society 3: 95. DOI:10.3847/2515-5172/ab30c5. ISSN 2515-5172.
- ↑ Thévenot, Melina (2020-01-01). "Cometary Tails as a Sign of Disk Photoevaporation in NGC 6193". Research Notes of the American Astronomical Society 4: 15. DOI:10.3847/2515-5172/ab701d. ISSN 2515-5172.
- ↑ Keel, William (2024-02-01). "The 2nd Galaxy Zoo search for distant EELRs around extant and fading AGN: 40 new Voorwerpjes". American Astronomical Society, AAS Meeting #243 243: 175.08.
- ↑ Isolated planets archive (in en). Isolated planets archive. Retrieved on 2024-08-01.
- ↑ Foreground asteroid passing the Crab Nebula (in en). www.esa.int. Retrieved on 2019-12-27.
- ↑ information@eso.org. Asteroid in the Crab Nebula (M1) (in en). www.spacetelescope.org. Retrieved on 2019-12-27.
External Links
[edit]- https://isolatedplanetsarchive.wordpress.com/ my website
- https://orcid.org/0000-0001-5284-9231 my ORCID
- Citizen Scientist Finds Ancient White Dwarf Star Encircled by Puzzling Rings press-release featuring our discovery
- Foreground asteroid passing the Crab Nebula An image that I did create was featured as the "Space Science image of the week" on the ESA website