Science2023-03-30T11:40:01+01:00

SCIENCE

Some talks, presentations, articles and papers from the project

Refereed Publications

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, in press (.pdf version)

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 (.pdf version)

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 (.pdf version)

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 (.pdf version)

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 (.pdf version)

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 (.pdf version)

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 (.pdf version)

Hillenbrand, L.A., Contreras Pena, C., Morrell, S., et al., 2018, Gaia 17bpi: An FU Ori Type Outburst, ApJ, 869, 146 (.pdf version or 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 (.pdf version)

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 (.pdf version)

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 should be added as a co-author (if s/he wishes so), 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.

Science Talks / Presentations / Articles

Hunting for Eruptive Young Stellar Objects, Article on the BAA website, advertising the expansions of the project to variable star observers in the UK.

Hunting for Eruptive Young Stellar Objects, Article in the BAA VSS Circular 174 (December 2017), advertising the expansions of the project to variable star observers in the UK.

Optical brightness and colours of V2492Cyg before, during and after the recent record peak in brightness, ATel10259, 12.04.2017

Froebrich, D., Scholz, A., Campbell-White, J., Crumpton, J., D’Arcy, E., Makin, S.V., Zegmott, T., Billington, S.J., Hibbert, R., Newport, R.J., Fisher, C.R. 2018, Variability in IC5070: two young stars with deep recurring eclipses, RNAAS, 2, 61 (.pdf version)

How to form stars and clusters and how to help us understand it, Stargazing Live Talk, 03.03.2017

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 232

22 June 2023|

This week we look at the variable young star AH Ori, which is situated north of the Orion Nebula (M42). The data shown are for last winter only. We did [...]

Lightcurve of the week 231

16 June 2023|

This week we revisit an object we looked at before (in April 2022) - IP Mon, a T-Tauri variable in the Christmas Tree Cluster. The object has not changed its [...]

Lightcurve of the week 230

8 June 2023|

This week we remain in the V555Ori target field region, and have a look at the light curve of the young star TT-Ori. In the plot above we show the [...]

Lightcurve of the week 229

1 June 2023|

Thanks to our data processing volunteers we have now fully cleared our data input backlog, and only a handful of recently uploaded images remain to be processed. There are now [...]

Lightcurve of the week 228

24 May 2023|

This week we look at the light curve of the young variable star AA Ori. It is situated in the south of the Orion Nebula Cluster. It is your proto-typical [...]

Lightcurve of the week 227

17 May 2023|

This week we have a little look at the background data storage and the improvement works we are currently doing. These are needed to a) make the entire photometry dataset [...]

Lightcurve of the week 226

11 May 2023|

This week we have a brief look at some of the preliminary analysis for the next overview paper. For all cluster members in the HOYS target fields we have identified [...]

Lightcurve of the week 225

4 May 2023|

A big thank you to the new participants that help us with the data processing. We have now almost 82,000 images in the database and over 2 million photometry data [...]

Lightcurve of the week 224

26 April 2023|

This week we look at the new data of the emission line star EmStHA50. It is part of the SigmaOri star forming region, but according to the parallax situated in [...]

Lightcurve of the week 223

19 April 2023|

Our work on investigating the variability of spots on young stars is continuing. This week we have a look at a pre-view plot from this work, which we are writing [...]

Lightcurve of the week 222

12 April 2023|

This week we conclude the look at the newly added data for the three stars from our paper "A survey for variable young stars with small telescopes: V – Analysis [...]

Lightcurve of the week 221

6 April 2023|

Data input into the database is continuing, and we have now 80100 images processed. There is still a backlog of just over 7000 images to work through, with new ones [...]

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