A survey for variable young stars with small telescopes – IX. Evolution of spot properties on YSOs in IC 5070
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| Názov: | A survey for variable young stars with small telescopes – IX. Evolution of spot properties on YSOs in IC 5070 |
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| Autori: | Carys Herbert, D. Froebrich, S. Vanaverbeke, A. Scholz, J. Eislöffel, Thomas Urtly, Ivan L Walton, K. Wiersema, Nick Quinn, G. Piehler, Mario Morales Aimar, Rafael Castillo García, Tonny Vanmunster, Francisco C Soldán Alfaro, Faustino García de la Cuesta, D. Licchelli, Alex Escartin Perez, Esteban Fernández Mañanes, Noelia Graciá Ribes, José Luis Salto González, Stephen R L Futcher, Tim Nelson, Shawn Dvorak, D. Moździerski, Krzysztof Kotysz, P. Mikołajczyk, George Fleming, M. W. Phillips, Tony Vale, Franky Dubois, H.-B. Eggenstein, Michael A Heald, Pablo Lewin, Derek OKeeffe, Adam Popowicz, Krzysztof Bernacki, Sławomir Lasota, Jerzy Fiołka, Adam Dustor, Stephen C. Percy, Pat Devine, Aashini L Patel, Matthew D. Dickers, Lord Dover, Ivana I. Grozdanova, J. S. Urquhart, Chris J R Lynch |
| Prispievatelia: | University of St Andrews.School of Physics and Astronomy, University of St Andrews.St Andrews Centre for Exoplanet Science |
| Zdroj: | Monthly Notices of the Royal Astronomical Society. 529:4856-4878 |
| Informácie o vydavateľovi: | Oxford University Press (OUP), 2024. |
| Rok vydania: | 2024 |
| Predmety: | star spots [Stars], Stars: formation, Optical 3D Laser Measurement Systems Optimization, Astronomy, Computational Mechanics, Stellar Astrophysics and Exoplanet Studies, Astrophysics, Stars: star spots, Engineering, Astronomical Instrumentation and Spectroscopy, 14. Life underwater, Instrumentation, Stars: variables: T Tauri, formation [Stars], pre-main-sequence [Stars], Physics, Stars: rotation, Multi-Object Spectroscopy, Astronomy and Astrophysics, 3rd-DAS, Stars, rotation [Stars], Physics and Astronomy, Variable star, 13. Climate action, variables: T Tauri [Stars], Physical Sciences, Stars: pre-main-sequence |
| Popis: | We present spot properties on 32 periodic young stellar objects in IC 5070. Long term, ∼5 yr, light curves in the V, R, and I-bands are obtained through the HOYS (Hunting Outbursting Young Stars) citizen science project. These are dissected into 6 months long slices, with 3 months oversampling, to measure 234 sets of amplitudes in all filters. We fit 180 of these with reliable spot solutions. Two thirds of spot solutions are cold spots, the lowest is 2150 K below the stellar temperature. One third are warm spots that are above the stellar temperature by less than ∼2000 K. Cold and warm spots have maximum surface coverage values of 40 per cent, although only 16 per cent of warm spots are above 20 per cent surface coverage as opposed to 60 per cent of the cold spots. Warm spots are most likely caused by a combination of plages and low-density accretion columns, most common on objects without inner disc excess emission in K − W2. Five small hot spot solutions have |
| Druh dokumentu: | Article Other literature type |
| Popis súboru: | application/pdf |
| Jazyk: | English |
| ISSN: | 1365-2966 0035-8711 |
| DOI: | 10.1093/mnras/stae812 |
| DOI: | 10.60692/390x2-vbb25 |
| DOI: | 10.60692/pnfca-ne621 |
| Prístupová URL adresa: | https://hdl.handle.net/10023/29637 |
| Rights: | CC BY |
| Prístupové číslo: | edsair.doi.dedup.....832a3b566d7f6b18f6e00729ebee34f7 |
| Databáza: | OpenAIRE |
Nájsť tento článok vo Web of Science | Abstrakt: | We present spot properties on 32 periodic young stellar objects in IC 5070. Long term, ∼5 yr, light curves in the V, R, and I-bands are obtained through the HOYS (Hunting Outbursting Young Stars) citizen science project. These are dissected into 6 months long slices, with 3 months oversampling, to measure 234 sets of amplitudes in all filters. We fit 180 of these with reliable spot solutions. Two thirds of spot solutions are cold spots, the lowest is 2150 K below the stellar temperature. One third are warm spots that are above the stellar temperature by less than ∼2000 K. Cold and warm spots have maximum surface coverage values of 40 per cent, although only 16 per cent of warm spots are above 20 per cent surface coverage as opposed to 60 per cent of the cold spots. Warm spots are most likely caused by a combination of plages and low-density accretion columns, most common on objects without inner disc excess emission in K − W2. Five small hot spot solutions have |
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| ISSN: | 13652966 00358711 |
| DOI: | 10.1093/mnras/stae812 |