Science2021-07-20T11:42:49+01:00

SCIENCE

Some talks, presentations, articles and papers from the project

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.

Refereed Publications

Dirk Froebrich, Efthymia Derezea, Aleks Scholz, Jochen Eislöffel, Siegfried Vanaverbeke, Alfred Kume, Carys Herbert, Justyn Campbell-White, Niall Miller, Bringfried Stecklum, Sally V. Makin, Thomas Urtly, Francisco C. Soldán Alfaro, Erik Schwendeman, Geoffrey Stone, Mark Phillips, George Fleming, Rafael Gonzalez Farfán, Tonny Vanmunster, Michael A. Heald, Esteban Fernández Mañanes, Tim Nelson, Heinz-Bernd Eggenstein, Franky Dubois, Ludwig Logie, Steve Rau, Klaas Wiersema, Nick Quinn, Diego Rodriguez, Rafael Castillo García, Thomas Killestein, Tony Vale, Domenico Licchelli, Marc Deldem, Georg Piehler, Dawid Moładzierski, Krzysztof Kotysz, Katarzyna Kowalska , Przemyslaw Mikołajczyk, Stephen R.L. Futcher, Timothy P. Long, Mario Morales Aimar, Barry Merrikin, Stephen Johnstone, Pavol A. Dubovský, Igor Kudzej, Roger Pickard, Samuel J. Billington, Lord Dover, Tarik Zegmott, Jack J. Evitts, Alejandra Traspas Munia, Mark C. Price, 2021, A survey for variable young stars with small telescopes: IV – Rotation Periods of YSOs in IC5070, MNRAS, in press (.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.; Eislöffel, J.; Campbell-White, J.; Furnell, W.; Urtly, T.; Pickard, R.; Wiersema, K.; Dubovský, P.A.; Kudzej, I.; Naves, R.; Morales Aimar, M.; Castillo García, R.; Vanmunster, T.; Schwendeman, E.; Soldán Alfaro, F.C.; Johnstone, S.; Gonzalez Farfán, R.; Killestein, T.; Delgado Casal, J.; García de la Cuesta, F.; Roberts, D.; Kolb, U.; Montoro, L.; Licchelli, D.; Escartin Perez, A.; Perelló Perez, C.; Deldem, M.; Futcher, S.R. L.; Nelson, T.; Dvorak, S.; Moładzierski, D.; Quinn, N.; Kotysz, K.; Kowalska, K.; Mikołajczyk, P.; Fleming, G.; Phillips, M.; Vale, T.; Dubois, F.; Logie, L.; Rau, S.; Vanaverbeke, S.; Merrikin, B.; Fernández Mañanes, E.; Erdelyi, E.; Gonzalez Carballo, J.-L.; Limon Martinez, F.; Long, T.P.; San Segundo Delgado, A.; Salto González, J.L.; Tremosa Espasa, L.; Piehler, G.; Crumpton, J.; Dover, L.; Billington, S.J.; D’Arcy, E.; Makin, S.V.; Bringfried S. 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., Naylor, T., Kuhn, M.,A., Cutri, R.M., Rebull, L.M., Hodgkin, S., Froebrich, D., Mainzer, A.K. 2018, Gaia 17bpi: An FU Ori Type Outburst, ApJ, 869, 146 (.pdf version or Press Release)

Froebrich, D., Campbell-White, J., Scholz, A., Eislöffel, J., Zegmott, T., Billington, S.J., Donohoe, J., Makin, S.V., Hibbert, R., Newport, R.J., Pickard, R., Quinn, N., Rodda, T., Piehler, G., Shelley, M., Parkinson, S., Wiersema, K., Walton, I., 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., Fang, M., Prieto, J. L., Stanek, K., Scholz, A., Kochanek, C. S., Henning, Th., Gredel, R., Holoien, T. W.-S., Rabus, M., Shappee, B. J., Billington, S. J., Campbell-White, J., Zegmott, T. J., 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.

LIGHT CURVES

Lightcurve of the week 149

18 November 2021|

This week we are looking again at a star that has recently been flagged up as variable by the Gaia photometric alerts. The object is called Gaia21uey, and also known [...]

Lightcurve of the week 148

10 November 2021|

While HOYS is aiming to investigate young stars, and thus focusses on imaging star forming regions and young clusters, it is obvious that there are other interesting objects in our [...]

Lightcurve of the week 147

3 November 2021|

This week we look back at another 'old(ish) friend' of this feature, and one of the HOYS auxiliary targets: The Gaia alert source Gaia19fct. Located quite far south (DEC=-10.5deg), it [...]

Lightcurve of the week 146

27 October 2021|

Frequently the data in our survey can be used to follow-up newly variable stars identified in data from the Gaia satellite - the so-called Gaia alerts. These objects are flagged [...]

Lightcurve of the week 145

21 October 2021|

This week we have another look at an object in the Orion Nebula (M42). We look at the star T-Ori, which is situated in the outskirts of M42 and known [...]

Lightcurve of the week 144

15 October 2021|

This week we look the the light curve of the young star AA Ori. It is situated in the southern part of the Orion Nebula (M42). It is known as [...]

Lightcurve of the week 143

7 October 2021|

This week we look at the light curve of the variable star V1598Cyg in the Pelican Nebula (IC5070). On the phase of it (see plot) it seems to be rather [...]

Lightcurve of the week 142

30 September 2021|

This weeks light curve is timely in two ways. First of all we are looking at the object Gaia21egu, (which is a known young star) that got flagged up as [...]

Lightcurve of the week 141

24 September 2021|

This week we look at the young star TX Ori. It is situated in the Sigma-Ori cluster, which is basically situated just to the south of the eastern belt star [...]

Lightcurve of the week 140

17 September 2021|

This week we look back at an old friend of the project. The very variable star V2492Cyg. It is situated in the Pelican Nebula (IC5070) one of our most observed [...]

Lightcurve of the week 139

8 September 2021|

This week we stay with the winter targets that do become visible in the mornings. We have a look at the star GR Mon in the NGC2264 cluster. The star [...]

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