Grankin, K. N., Bouvier, J., Herbst, W., Melnikov, S. Yu.
T Tauri stars exhibit variability on all timescales, whose origin is still debated. On WTTS the variability is fairly simple and attributed to long-lived, ubiquitous cool spots. We investigate the...
The rotation of young low-mass stars and brown dwarfs (2007)
Herbst, W., Eislöffel, J., Mundt, R., Scholz, A.
We review the current state of our knowledge concerning the rotation and angular momentum evolution of young stellar objects and brown dwarfs from a primarily observational viewpoint. There has been...
Grankin, K. N., Melnikov, S. Yu., Bouvier, J., Herbst, W., Shevchenko, V. S.
We present a unique, homogeneous database of photometric measurements for Classical T Tauri stars extending up to 20 years. The database contains more than 21,000 UBVR observations of 72 CTTs. All...
The Recurrent Eclipse of an Unusual Pre--Main-Sequence Star in IC 348 (2006)
Nordhagen, S., Herbst, W., Williams, E. C., Semkov, E.
The recurrence of a previously documented eclipse of a solar-like pre--main-sequence star in the young cluster IC 348 has been observed. The recurrence interval is 4.7 $\pm 0.1$ yr and portions of 4...
Nordhagen, S., Herbst, W., Rhode, K. L., Williams, E. C.
A variability study of the young cluster IC 348 at Van Vleck Observatory has been extended to a total of seven years. Twelve new periodic stars have been found in the last two years, bringing the...
Evidence for Differential Rotation on a T Tauri Star (2006)
Herbst, W., Dhital, S., Francis, A., Lin, L., Tresser, N., Williams, E.
Five years of photometric monitoring of the T Tauri star HBC 338 in NGC 1333 has revealed that it is a periodic variable, but the period has changed significantly with time. From 2000-2003, a period...
The Rotation of Young Low-Mass Stars and Brown Dwarfs (2006)
Herbst, W., Eisloeffel, J., Mundt, R., Scholz, A.
We review the current state of our knowledge concerning the rotation and angular momentum evolution of young stellar objects and brown dwarfs from a primarily observational view point. Periods are...
Rotation periods are now available for ~500 pre-main sequence and recently arrived main sequence stars of solar-like mass (0.4-1.2 M_sun) in five nearby young clusters: the Orion Nebula Cluster, NGC...
The Disappearing Act of KH 15D: Photometric Results from 1995 to 2004 (2005)
Hamilton, C. M., Herbst, W., Vrba, F. J., Ibrahimov, M. A., Mundt, R., ...
We present results from the most recent (2002-2004) observing campaigns of the eclipsing system KH 15D, in addition to re-reduced data obtained at Van Vleck Observatory (VVO) between 1995 and 2000....
Rotational modulation of X-ray emission in Orion Nebula young stars (2005)
Flaccomio, E., Micela, G., Sciortino, S., Feigelson, E. D., Herbst, W., Favata, F., ...
We investigate the spatial distribution of X-ray emitting plasma in a sample of young Orion Nebula Cluster stars by modulation of their X-ray light-curves due to stellar rotation. The study, part of...
Chandra Orion Ultradeep Project : Observations and source lists (2005)
Getman, K. V., Flaccomio, E., Broos, P. S., Grosso, N., Tsujimoto, M., Townsley, L., ...
Rotational evolution of low mass stars: The case of NGC 2264 (2005)
Lamm, M. H., Mundt, R., Herbst, W.
Our study is based on an extensive photometric monitoring program in the young (2-4 Myr) open cluster NGC 2264 by Lamm et al. (\cite{lamm}). This program resulted in a sample of 405 periodic...
An Optical Study of the Faint End of the Stellar Luminosity Function (2004)
Jarrett, T. H., Dickman, R. L., Herbst, W.
We implement a new method by which to study the faint end of the field star luminosity function. The method relies on deep, multicolor photometry of fields projected against highly obscured, nearby...
Chandra Orion Ultradeep Project: Observations and Source Lists (2004)
Getman, K. V., Flaccomio, E., Broos, P. S., Grosso, N., Tsujimoto, M., Townsley, L., ...
We present a description of the data reduction methods and the derived catalog of more than 1600 X-ray point sources from the exceptionally deep January 2003 Chandra X-ray Observatory observation of...
A rotational and variability study of a large sample of PMS stars in NGC 2264 (2004)
Lamm, M. H., Mundt, R., Herbst, W., Scholz, A.
We present the results of an extensive search for periodic and irregular variable pre-main sequence (PMS) stars in the young (2-4 Myr) open cluster NGC 2664, based on photometric monitoring using the...
A rotational and variability study of a large sample of PMS stars in NGC 2264 (2004)
Lamm, M. H., Mundt, R., Herbst, W., Scholz, A.
We present the results of an extensive search for periodic and irregular variable pre-main sequence (PMS) stars in the young (2-4 Myr) open cluster NGC 2264, based on photometric monitoring using the...
A Multi-Year Photometric Study of IC 348 (2003)
Cohen, R. E., Herbst, W., Williams, E. C.
The extremely young cluster IC 348 has been monitored photometrically over 5 observing seasons from Dec 1998 to March 2003 in Cousins I with a 0.6 m telescope at Van Vleck Observatory. Twenty-eight...
An Unusual Eclipse of a Pre-Main Sequence Star in IC 348 (2003)
Cohen, R. E., Herbst, W., Williams, E. C.
A solar-like pre-main sequence star (TJ 108 = H 187 = LRLL 35 = HMW 15) in the extremely young cluster IC 348 has been found, which apparently experienced an eclipse lasting ~3.5 years, much longer...
Studies of epidemiology and seroprevalence of bovine noroviruses in Germany (2003)
Deng, Y., Batten, C.A., Liu, B.L., Lambden, P.R., Elschner, M., Gunther, H., ...
Jena virus (JV) is a bovine enteric calicivirus that causes diarrhea in calves. The virus is approximately 30 nm in diameter and has a surface morphology similar to the human Norwalk virus. The...
Rotation and variability of PMS Stars in NGC 2264 (2003)
Lamm, M. H., Mundt, R., Herbst, W., Scholz, A.
Table 4 lists the 10554 stars in the area of NGC 2264 between IC=9.8mag and IC=21mag on which we did photometry. It contains information on the position, brightness, colours and the variability of...
Variability and Rotation of Pre-Main Sequence Stars in NGC2264 (2002)
Lamm, M., Mundt, R., Herbst, W.
We present the first results of a variability and rotational period study of the pre-main sequence (PMS) stars in the young (2-4 Myr) open cluster NGC 2264 (d=770 pc). We have carried out I band...
Rotational Velocities and Radii of Pre-Main-Sequence Stars in the Orion Nebula Cluster (2001)
Rhode, K. L., Herbst, W., Mathieu, R. D.
We have obtained high-dispersion spectra for 256 pre-main-sequence stars in the Orion Nebula Cluster in order to measure their projected rotational velocities and study the rotational evolution and...
The Mass Dependence Of Stellar Rotation In The Orion Nebula Cluster (2001)
We have determined new rotation periods for 404 stars in the Orion Nebula cluster (ONC) using the Wide Field Imager attached to the MPG/ESO 2.2 m telescope on La Silla, Chile. Mass estimates are...
The Mass Dependence of Stellar Rotation in the Orion Nebula Cluster (2001)
We have determined new rotation periods for 404 stars in the Orion Nebula Cluster using the Wide Field Imager attached to the MPG/ESO 2.2 m telescope on La Silla, Chile. Mass estimates are available...
A Variability Study of Pre-Main Sequence Stars in the Extremely Young Cluster IC 348 (2000)
Herbst, W., Maley, J. A., Williams, E. C
The extremely young cluster IC 348 has been monitored in the Cousins I band with a 0.6 m telescope at Wesleyan's Van Vleck Observatory. Photometry of 150 stars was obtained on 76 images taken on 27...
Rotation in the Orion Nebula Cluster (1999)
Herbst, W., Rhode, K. L., Hillenbrand, L. A., Curran, G.
Eighteen fields in the Orion Nebula Cluster (ONC) have been monitored for one or more observing seasons from 1990-99 with a 0.6-m telescope at Wesleyan University. Photometric data were obtained in...
Daniel O'Connell:--die Beitrachtung eines publizistischen Lebens. (1952)
Inaugural-Dissertation zur Erlangung des Dohtowürden vorgelegt bei Philosophischen Fakultät der Freien Universitat zu Berlin.
Studies of Epidemiology and Seroprevalence of Bovine Noroviruses in Germany
Deng, Y., Batten, C. A., Liu, B. L., Lambden, P. R., Elschner, M., Günther, H., ...
Jena virus (JV) is a bovine enteric calicivirus that causes diarrhea in calves. The virus is approximately 30 nm in diameter and has a surface morphology similar to the human Norwalk virus. The...
Studies of Epidemiology and Seroprevalence of Bovine Noroviruses in Germany
Deng, Y., Batten, C. A., Liu, B. L., Lambden, P. R., Elschner, M., Günther, H., ...
Jena virus (JV) is a bovine enteric calicivirus that causes diarrhea in calves. The virus is approximately 30 nm in diameter and has a surface morphology similar to the human Norwalk virus. The...