Skip to content

Toggle service links

Coronavirus: Please be aware it may take us slightly longer to respond than usual. Find out about our coronavirus response and current contact hours.

You are here

  1. Home
  2. Dr Marcus Lohr

Dr Marcus Lohr

Profile summary

Research interests

During my PhD at the OU I worked with Andrew Norton, using the SuperWASP archive to study variable stars, especially eclipsing binaries and variables exhibiting period changes.  Initially I concentrated on very short-period binaries - usually W UMa-type contact systems - close to the cut-off in the period distribution for main sequence binaries, around 0.20 days.  Many of these binaries have proved to be part of higher-order multiple systems, leading to an ongoing interest in stellar multiplicity more generally; I have also studied post-common-envelope eclipsing binaries to search for orbital period changes potentially linked to planetary companions.  Currently I am working with Simon Clark, looking at high-mass stars in young massive clusters, especially in the Galactic Centre, and identifying binaries and Cepheids.


Constraining the population of isolated massive stars within the Central Molecular Zone (2021-05)
Clark, J. S.; Patrick, L. R.; Najarro, F.; Evans, C. J. and Lohr, M.
Astronomy & Astrophysics, 649, Article A43

A VLT/FLAMES survey for massive binaries in Westerlund 1. V. the X-ray selected blue stragglers Wd1-27 and -30a (2019-03)
Clark, J. S.; Najarro, F.; Negueruela, I.; Ritchie, B. W.; Gonzalez Fernandez, C. and Lohr, M. E.
Astronomy & Astrophysics, 623, Article A83

An updated stellar census of the Quintuplet cluster (2018-10)
Clark, J. S.; Lohr, M. E.; Patrick, L. R.; Najarro, F.; Dong, H. and Figer, D. F.
Astronomy & Astrophysics, 618, Article A2

The Arches cluster revisited: II. A massive eclipsing spectroscopic binary in the Arches cluster (2018-09-13)
Lohr, M. E.; Clark, J. S.; Najarro, F.; Patrick, L. R.; Crowther, P. A. and Evans, C. J.
Astronomy & Astrophysics, 617, Article A66

New Cepheid variables in the young open clusters Berkeley 51 and Berkeley 55 (2018-08-21)
Lohr, M. E.; Negueruela, I.; Tabernero, H. M.; Clark, J. S.; Lewis, F. and Roche, P.
Monthly Notices of the Royal Astronomical Society, 478(3) (pp. 3825-3831)

SuperWASP discovery and SALT confirmation of a semi-detached eclipsing binary that contains a delta Scuti star (2016-03)
Norton, A.J.; Lohr, M.E.; Smalley, B.; Wheatley, P.J. and West, R.G.
Astronomy & Astrophysics, 587, Article A54(March 2016)

A long-period Cepheid variable in the starburst cluster VdBH222 (2015-12-07)
Clark, J. S.; Negueruela, I.; Lohr, M. E.; Dorda, R.; González-Fernández, C.; Lewis, F. and Roche, P.
Astronomy & Astrophysics, 584, Article L12

Starspot distributions on fully convective M dwarfs: implications for radial velocity planet searches (2015-10-07)
Barnes, J. R.; Jeffers, S. V.; Jones, H. R. A.; Pavlenko, Ya. V.; Jenkins, J. S.; Haswell, C. A. and Lohr, M. E.
The Astrophysical Journal, 812(1) (p 42)

Orbital period changes and the higher-order multiplicity fraction amongst SuperWASP eclipsing binaries (2015-06-17)
Lohr, M. E.; Norton, A. J.; Payne, S. G.; West, R. G. and Wheatley, P. J.
Astronomy & Astrophysics, 578, Article A136

The doubly eclipsing quintuple low-mass star system 1SWASP J093010.78+533859.5 (2015-06-12)
Lohr, M. E.; Norton, A. J.; Gillen, E.; Busuttil, R.; Kolb, U. C.; Aigrain, S.; McQuillan, A.; Hodgkin, S. T. and González, E.
Astronomy & Astrophysics, 578, Article A103

An Astrophysical Laboratory: Understanding and Exploiting the Young Massive Cluster Westerlund 1 (2015-03)
Clark, Simon; Negueruela, Ignacio; Ritchie, Ben; Najarro, Paco; Langer, Norbert; Crowther, Paul; Bartlett, Liz; Fenech, Danielle; González-Fernández, Carlos; Goodwin, Simon; Lohr, Marcus and Prinja, Raman
The Messenger, 159 (pp. 30-35)

Period and amplitude variations in post-common-envelope eclipsing binaries observed with SuperWASP (2014-06)
Lohr, M. E,; Norton, A. J.; Anderson, D. R.; Collier Cameron, A.; Faedi, F.; Haswell, C. A.; Hellier, C.; Hodgkin, S. T.; Horne, K.; Kolb, U. C.; Maxted, P. F. L.; Pollacco, D.; Skillen, I.; Smalley, B.; West, R. G. and Wheatley, P. J.
Astronomy & Astrophysics, 566, Article A128

Parameters of two low-mass contact eclipsing binaries near the short-period limit (2014-02)
Lohr, M. E.; Hodgkin, S. T.; Norton, A. J. and Kolb, U. C.
Astronomy & Astrophysics, 563, Article A34

One, two, or three stars? An investigation of an unusual eclipsing binary candidate undergoing dramatic period changes (2013-10)
Lohr, M. E.; Norton, A. J.; Kolb, U. C. and Boyd, D. R. S.
Astronomy & Astrophysics, 558

Period and period change measurements for 143 SuperWASP eclipsing binary candidates near the short-period limit and discovery of a doubly eclipsing quadruple system (2013-01)
Lohr, M. E.; Norton, A. J.; Kolb, U. C.; Maxted, P. F. L.; Todd, I. and West, R. G.
Astronomy & Astrophysics, 549, Article A86

Period decrease in three SuperWASP eclipsing binary candidates near the short-period limit (2012-06)
Lohr, M. E.; Norton, A. J.; Kolb, U. C.; Anderson, D. R.; Faedi, F. and West, R. G.
Astronomy & Astrophysics, 542, Article A124

Photospheric acne at the bottom of the main-sequence: Doppler images of M4.5 - M9V stars (2016)
Barnes, John; Haswell, Carole; Jeffers, Sandra; Jones, Hugh; Pavlenko, Yakiv; Lohr, Marcus and Jenkins, James
In : The 19th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun (Jun 2016, Uppsala, Sweden)

Exploring eclipsing binaries, triples and higher-order multiple star systems with the SuperWASP archive (2015-08-03)
Lohr, Marcus
In : Living Together: Planets, Host Stars and Binaries (8-12 Sep 2014, Litomyšl, Czech Republic) (pp. 71-75)

Eclipsing Binaries and Period Changes in the SuperWASP Archive (2015-01-13)
Lohr, Marcus
PhD thesis The Open University