A survey for variable young stars with small telescopes: VIII — Properties of 1687 Gaia selected members in 21 nearby clusters

Froebrich, Dirk and Scholz, Aleks and Campbell-White, Justyn and Vanaverbeke, Siegfried and Herbert, Carys and Eislöffel, Jochen and Urtly, Thomas and Long, Timothy P. and Walton, Ivan L. and Wiersema, Klaas and Quinn, Nick J. and Rodda, Tony and González-Carballo, Juan-Luis and Morales Aimar, Mario and Castillo Garc\'\ia, Rafael and Soldán Alfaro, Francisco C. and Garc\'\ia de la Cuesta, Faustino and Licchelli, Domenico and Escartin Perez, Alex and Salto González, José Luis and Deldem, Marc and Futcher, Stephen R.~L. and Nelson, Tim and Dvorak, Shawn and Moździerski, Dawid and Kotysz, Krzysztof and Mikołajczyk, Przemysław and Fleming, George and Phillips, Mark and Vale, Tony and Ö\umen, Yenal and Dubois, Franky and Rolfe, Samantha M. and Campbell, David A. and Eggenstein, Heinz-Bernd and Hambsch, Franz-Josef and Heald, Michael A. and Lewin, Pablo and Rose, Adam C. and Stone, Geoffrey and Crow, Martin Valentine and Dawes, Simon Francis and OKeeffe, Derek and Popowicz, Adam and Bernacki, Krzysztof and Malcher, Andrzej and Lasota, Slawomir and Fiolka, Jerzy and Dustor, Adam and Vajpayee, Amritanshu and Devine, Pat and Kolb, Matthias and Marquette, Jean-Baptiste and Ruppel, Gregg L. and Crowson, Dan R. and Marcos da Silva, Cledison and Michaud, Michel and Patel, Aashini L. and Dickers, Matthew D. and Dover, Lord and Grozdanova, Ivana I. and Urquhart, James S. and Lynch, Chris J.~R. (2024) A survey for variable young stars with small telescopes: VIII — Properties of 1687 Gaia selected members in 21 nearby clusters. [Preprint] (doi:10.48550/arXiv.2401.16883) (KAR id:104820)

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Official URL: https://doi.org/10.48550/arXiv.2401.16883

Related resource
Resource title:	A survey for variable young stars with small telescopes – VIII. Properties of 1687 Gaia selected members in 21 nearby clusters
Resource type:	Publication
DOI:	10.1093/mnras/stae311
KDR/KAR URL:	https://kar.kent.ac.uk/104881/
External URL:	https://doi.org/10.1093/mnras%2Fstae311

Abstract

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 ( 7 yr) 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.

Item Type:	Preprint
DOI/Identification number:	10.48550/arXiv.2401.16883
Refereed:	No
Other identifier:	https://arxiv.org/abs/2401.16883
Name of pre-print platform:	arXiv
Uncontrolled keywords:	Astrophysics - Solar and Stellar Astrophysics, Astrophysics - Astrophysics of Galaxies
Subjects:	Q Science > QB Astronomy > QB460 Astrophysics
Divisions:	Divisions > Division of Natural Sciences > Physics and Astronomy
Funders:	Science and Technology Facilities Council (https://ror.org/057g20z61)
Depositing User:	Dirk Froebrich
Date Deposited:	31 Jan 2024 12:09 UTC
Last Modified:	06 Mar 2024 14:53 UTC
Resource URI:	https://kar.kent.ac.uk/id/eprint/104820 (The current URI for this page, for reference purposes)

University of Kent Author Information

Froebrich, Dirk.

Creator's ORCID:	https://orcid.org/0000-0003-4734-3345
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