{
  "id": "2407.07607",
  "version": "v1",
  "published": "2024-07-10T12:45:05.000Z",
  "updated": "2024-07-10T12:45:05.000Z",
  "title": "Searching for stellar cycles on low mass stars using TESS data",
  "authors": [
    "Gavin Ramsay",
    "Pasi Hakala",
    "J. Gerry Doyle"
  ],
  "comment": "Accepted by A&A. 8 pages plus 3 pages of figures in an Appendix",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "We have searched for stellar activity cycles in late low mass M dwarfs (M0--M6) located in the TESS north and south continuous viewing zones using data from sectors 1--61 (Cycle 1 to part way through Cycle 5). We utilise TESS-SPOC data which initially had a cadence of 30 min but reducing to 10 min in Cycles 3. In addition, we require each star to be observed in at least 6 sectors in each North/South Cycle: 1,950 low mass stars meet these criteria. Strong evidence was seen in 245 stars for a very stable photometric variation which we assume to be a signature of the stars rotation period. We did a similar study for Solar-like stars and found that 194 out of 1432 stars had a very stable modulation. We then searched for evidence of a variation in the rotational amplitude. We found 26 low mass stars showed evidence of variability in their photometric amplitude and only one Solar-like star. Some show a monotonic trend over 3--4 yrs whilst other show shorter term variations. We determine the predicted cycle durations of these stars using the relationship found by Irving (2023} using an estimate of the stars Rossby number. Finally we find a marginally statistically significant correlation between the range in the rotational amplitude modulation and the rotation period.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2024-07-10T12:45:05.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "tess data",
      "stellar cycles",
      "low mass stars meet",
      "low mass stars showed evidence",
      "rotation period"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 8,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}