A survey for variable young stars with small telescopes: VIII -- Properties of 1687 Gaia selected members in 21 nearby clusters
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| Format: | Preprint |
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2024
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| author | Froebrich, Dirk Scholz, Aleks Campbell-White, Justyn Vanaverbeke, Siegfried Herbert, Carys Eislöffel, Jochen Urtly, Thomas Long, Timothy P. Walton, Ivan L. Wiersema, Klaas Quinn, Nick J. Rodda, Tony González-Carballo, Juan-Luis Aimar, Mario Morales García, Rafael Castillo Alfaro, Francisco C. Soldán de la Cuesta, Faustino García Licchelli, Domenico Perez, Alex Escartin González, José Luis Salto Deldem, Marc Futcher, Stephen R. L. Nelson, Tim Dvorak, Shawn Moździerski, Dawid Kotysz, Krzysztof Mikołajczyk, Przemysław Fleming, George Phillips, Mark Vale, Tony Öğmen, Yenal Dubois, Franky Rolfe, Samantha M. Campbell, David A. Eggenstein, Heinz-Bernd Hambsch, Franz-Josef Heald, Michael A. Lewin, Pablo Rose, Adam C. Stone, Geoffrey Crow, Martin Valentine Dawes, Simon Francis OKeeffe, Derek Popowicz, Adam Bernacki, Krzysztof Malcher, Andrzej Lasota, Slawomir Fiolka, Jerzy Dustor, Adam Vajpayee, Amritanshu Devine, Pat Kolb, Matthias Marquette, Jean-Baptiste Ruppel, Gregg L. Crowson, Dan R. da Silva, Cledison Marcos Michaud, Michel Patel, Aashini L. Dickers, Matthew D. Dover, Lord Grozdanova, Ivana I. Urquhart, James S. Lynch, Chris J. R. |
| author_facet | Froebrich, Dirk Scholz, Aleks Campbell-White, Justyn Vanaverbeke, Siegfried Herbert, Carys Eislöffel, Jochen Urtly, Thomas Long, Timothy P. Walton, Ivan L. Wiersema, Klaas Quinn, Nick J. Rodda, Tony González-Carballo, Juan-Luis Aimar, Mario Morales García, Rafael Castillo Alfaro, Francisco C. Soldán de la Cuesta, Faustino García Licchelli, Domenico Perez, Alex Escartin González, José Luis Salto Deldem, Marc Futcher, Stephen R. L. Nelson, Tim Dvorak, Shawn Moździerski, Dawid Kotysz, Krzysztof Mikołajczyk, Przemysław Fleming, George Phillips, Mark Vale, Tony Öğmen, Yenal Dubois, Franky Rolfe, Samantha M. Campbell, David A. Eggenstein, Heinz-Bernd Hambsch, Franz-Josef Heald, Michael A. Lewin, Pablo Rose, Adam C. Stone, Geoffrey Crow, Martin Valentine Dawes, Simon Francis OKeeffe, Derek Popowicz, Adam Bernacki, Krzysztof Malcher, Andrzej Lasota, Slawomir Fiolka, Jerzy Dustor, Adam Vajpayee, Amritanshu Devine, Pat Kolb, Matthias Marquette, Jean-Baptiste Ruppel, Gregg L. Crowson, Dan R. da Silva, Cledison Marcos Michaud, Michel Patel, Aashini L. Dickers, Matthew D. Dover, Lord Grozdanova, Ivana I. Urquhart, James S. Lynch, Chris J. R. |
| contents | The Hunting Outbursting Young Stars (HOYS) project performs long-term, optical, multi-filter, high cadence monitoring of 25 nearby young clusters and star forming regions. Utilising Gaia DR3 data we have identified about 17000 potential young stellar members in 45 coherent astrometric groups in these fields. Twenty one of them are clear young groups or clusters of stars within one kiloparsec and they contain 9143 Gaia selected potential members. The cluster distances, proper motions and membership numbers are determined. We analyse long term (about 7yr) V, R, and I-band light curves from HOYS for 1687 of the potential cluster members. One quarter of the stars are variable in all three optical filters, and two thirds of these have light curves that are symmetric around the mean. Light curves affected by obscuration from circumstellar materials are more common than those affected by accretion bursts, by a factor of 2-4. The variability fraction in the clusters ranges from 10 to almost 100 percent, and correlates positively with the fraction of stars with detectable inner disks, indicating that a lot of variability is driven by the disk. About one in six variables shows detectable periodicity, mostly caused by magnetic spots. Two thirds of the periodic variables with disk excess emission are slow rotators, and amongst the stars without disk excess two thirds are fast rotators - in agreement with rotation being slowed down by the presence of a disk. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_16883 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | A survey for variable young stars with small telescopes: VIII -- Properties of 1687 Gaia selected members in 21 nearby clusters Froebrich, Dirk Scholz, Aleks Campbell-White, Justyn Vanaverbeke, Siegfried Herbert, Carys Eislöffel, Jochen Urtly, Thomas Long, Timothy P. Walton, Ivan L. Wiersema, Klaas Quinn, Nick J. Rodda, Tony González-Carballo, Juan-Luis Aimar, Mario Morales García, Rafael Castillo Alfaro, Francisco C. Soldán de la Cuesta, Faustino García Licchelli, Domenico Perez, Alex Escartin González, José Luis Salto Deldem, Marc Futcher, Stephen R. L. Nelson, Tim Dvorak, Shawn Moździerski, Dawid Kotysz, Krzysztof Mikołajczyk, Przemysław Fleming, George Phillips, Mark Vale, Tony Öğmen, Yenal Dubois, Franky Rolfe, Samantha M. Campbell, David A. Eggenstein, Heinz-Bernd Hambsch, Franz-Josef Heald, Michael A. Lewin, Pablo Rose, Adam C. Stone, Geoffrey Crow, Martin Valentine Dawes, Simon Francis OKeeffe, Derek Popowicz, Adam Bernacki, Krzysztof Malcher, Andrzej Lasota, Slawomir Fiolka, Jerzy Dustor, Adam Vajpayee, Amritanshu Devine, Pat Kolb, Matthias Marquette, Jean-Baptiste Ruppel, Gregg L. Crowson, Dan R. da Silva, Cledison Marcos Michaud, Michel Patel, Aashini L. Dickers, Matthew D. Dover, Lord Grozdanova, Ivana I. Urquhart, James S. Lynch, Chris J. R. Solar and Stellar Astrophysics Astrophysics of Galaxies The Hunting Outbursting Young Stars (HOYS) project performs long-term, optical, multi-filter, high cadence monitoring of 25 nearby young clusters and star forming regions. Utilising Gaia DR3 data we have identified about 17000 potential young stellar members in 45 coherent astrometric groups in these fields. Twenty one of them are clear young groups or clusters of stars within one kiloparsec and they contain 9143 Gaia selected potential members. The cluster distances, proper motions and membership numbers are determined. We analyse long term (about 7yr) V, R, and I-band light curves from HOYS for 1687 of the potential cluster members. One quarter of the stars are variable in all three optical filters, and two thirds of these have light curves that are symmetric around the mean. Light curves affected by obscuration from circumstellar materials are more common than those affected by accretion bursts, by a factor of 2-4. The variability fraction in the clusters ranges from 10 to almost 100 percent, and correlates positively with the fraction of stars with detectable inner disks, indicating that a lot of variability is driven by the disk. About one in six variables shows detectable periodicity, mostly caused by magnetic spots. Two thirds of the periodic variables with disk excess emission are slow rotators, and amongst the stars without disk excess two thirds are fast rotators - in agreement with rotation being slowed down by the presence of a disk. |
| title | A survey for variable young stars with small telescopes: VIII -- Properties of 1687 Gaia selected members in 21 nearby clusters |
| topic | Solar and Stellar Astrophysics Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2401.16883 |