Refereed Publications
Hamilton, C.M., Chacko, A.B., Carson, G.A., et al., 2026, A Pre-Main Sequence Binary Viewed Through its Circumbinary Disk: A New Phase for KH 15D, A&A, in press
Froebrich, D., Herbert, C., Scholz, A., et al., 2026, A survey for variable young stars with small telescopes – XI. Spot Lifetimes and Coverage Distributions, MNRAS, 551, 1428
Fuhrmeister, B., Schneider, P. C., Eislöffel, J., Froebrich, D., Armeni, A., Frasca, A., Mauco, K., Stelzer, B., Manara, C. F., 2025, PENELLOPE: VIII. Veiling and extinction variations of V505 Ori, A&A, 704, 229
Ryan B.W., Stokes-Geddes H., Froebrich D., 2025, A survey for variable young stars with small telescopes: X – Comparing stochastic YSO light curves, MNRAS, 543, 1133
Herbert C., Froebrich D., Vanaverbeke S., et al. 2024, A survey for variable young stars with small telescopes: IX – Evolution of Spot Properties on YSOs in IC 5070, MNRAS, 529, 4856
Froebrich D., Scholz A., Campbell-White, J., et al. 2024, A survey for variable young stars with small telescopes: VIII – Properties of 1687 Gaia selected members in 21 nearby clusters, MNRAS, 529, 1283
Derezea, E., Kume, A., Froebrich, D., 2023, An application of Saddlepoint Approximation for period detection of stellar light observations, Journal of the Royal Statistical Society: Series C, Applied Statistics, 72, 1
Herbert C., Froebrich D., Scholz A., 2023, A survey for variable young stars with small telescopes: VII – Spot Properties on YSOs in IC5070, MNRAS, 520, 5433
Froebrich D., Hillenbrand, L.A., Herbert, C., et al. 2023, A survey for variable young stars with small telescopes: VI – Analysis of the outbursting Be stars NSW284, Gaia19eyy, and VES263, MNRAS, 520, 5413
Froebrich D., Eislöffel J., Stecklum B., Herbert C., Hambsch F.-J., 2022, A survey for variable young stars with small telescopes: V – Analysis of TXOri, V505Ori, and V510Ori, the HST ULLYSES targets in the σ Ori cluster, MNRAS, 510, 2883
Froebrich D., Derezea, E., Scholz A., et al., 2021, A survey for variable young stars with small telescopes: IV – Rotation Periods of YSOs in IC5070, MNRAS, 506, 5989
Froebrich, D., Scholz, A., Eislöffel, J., Stecklum, B., 2020, A survey for variable young stars with small telescopes: III – Warm spots on the active stars V1598Cyg, MNRAS, 497, 4602
Evitts, J.J.; Froebrich, D.; Scholz, A.; et al., 2020, A survey for variable young stars with small telescopes: II – Mapping a protoplanetary disk with stable structures at 0.15 AU, MNRAS, 493, 184
Hillenbrand, L.A., Contreras Pena, C., Morrell, S., et al., 2018, Gaia 17bpi: An FU Ori Type Outburst, ApJ, 869, 146 (Press Release)
Froebrich, D., Campbell-White, J., Scholz, A., et al., 2018, A survey for variable young stars with small telescopes: First results from HOYS-CAPS, MNRAS, 478, 5091
Sicilia-Aguilar, A., Oprandi, A., Froebrich, D., et al., 2017, The 2014-2017 outburst of the young star ASASSN-13db: A time-resolved picture of a very low-mass star between EXors and FUors, A&A, 2017, 607, 127
HOYS Publication Guidelines
All publications using any HOYS data should reference the project description paper (Froebrich et al. 2018, MNRAS, 478, 5091) and the data calibration paper (Evitts et al. 2020, MNRAS, 493, 184). If not all contributors of data are included in the author list, then the following should be added to the acknowledgements of every publication: “We would like to thank all contributors of observational data for their efforts towards the success of the HOYS project.”
We aim to disseminate the results of the science exploitation of the HOYS data with two kinds of publications. These are: i) larger, survey description type publications and ii) smaller, more specific publications.
We plan to write type i) publications about every one to two years. On these publications every participant who contributed data in the 3 years prior to the data analysis should be added as a co-author (if they so wish), as well as everyone involved in the data analysis.
All other, type ii) publications using any HOYS data should include everyone as a co-author who made a significant contribution to the scientific analysis of the data and the preparation of the publication. Furthermore, any contributor who made a significant contribution to the dataset analysed in the publication should be added as co-author. In other words, anyone whose data cannot be removed without significantly degrading the quality of the analysis should be made a co-author.
The Physics of Star Formation, Public talk for Crayford Manor House Astronomical Society Dartford, 03.11.2016
Photometric Monitoring of nearby young Clusters as a Citizen Science Project, Poster at Star Formation 2016 Conference in Exeter, 24.08.2016
Photometric Monitoring of nearby young Clusters as a Citizen Science Project, Talk at Star Formation 2016 Conference in Exeter, 24.08.2016
The Physics of Star Formation, Talk at Hampshire Astronomical Group Meeting on 13.05.2016
The Physics of Star Formation, Talk at SEKAS Meeting on 09.01.2016
Hunting for Eruptive Young Stellar Objects, Article in the BAA VSS Circular 164 (June 2015), advertising the project to variable star observers in the UK.
Hunting for Eruptive Young Stellar Objects, Talk given at BAA Spring Meeting in Ashford on 25.04.2015, presenting some initial results of the search for high amplitute variables in NGC 2264.
LIGHT CURVES
Lightcurve of the week 391
This week we look at a screen shot of a rather boring looking light curve - more or less flat and most variations look like noise in the data. [...]
Lightcurve of the week 390
This week we have a sneak preview of a figure for one of the papers currently in the advanced stage of preparation. In that paper we are making different [...]
Lightcurve of the week 389
Where is V2492Cyg???? In the past we have repeatedly shown and discussed the light curve of V2492Cyg. For example the post from week 332 shows the full HOYS data [...]
Lightcurve of the week 388
This week the image above is of the HOYS server homepage. So why is this exciting? Well, as you know we have been working in the background to restructure [...]
Lightcurve of the week 387
Apologies - it was so busy on Friday, I forgot to press the submit button .... We are approaching the summer slump of data coming in - all winter [...]
Lightcurve of the week 386
Do you remember the strange double period object we looked at in week 306 and week 268? It did show show for several years a behaviour that indicated two [...]
Lightcurve of the week 385
This week we look at the light curve of the young star AH Ori, which is situated just north of the Orion Nebula, M42. The object is classified as [...]
Lightcurve of the week 384
This week we look at the light curve of the young star V1492Cyg in the Pelican Nebula. The data shown in the above plot are about 200 days from [...]
Lightcurve of the week 383
We continue to follow up the posts from the last two weeks (see here and here) and briefly discuss the eclipsing binary we talked about. But mostly this will [...]
Lightcurve of the week 382
You will be shocked to hear I found a bit of time (lunchbreak) this week, so we can follow up last weeks post and look at the period of [...]
Lightcurve of the week 381
This week we look at the young star V1174Ori. It is situated in the south of the Orion Nebula and classified as an Orion Variable. This means it varies [...]
Lightcurve of the week 380
This week we look at the young star V350Cep. This is an old friend of this feature and you can read through the multitude of posts about it by [...]