New very massive stars in Cygnus OB2 (2008)
Negueruela, Ignacio, Marco, Amparo, Herrero, Artemio, Clark, Simon
The compact association Cygnus OB2 is known to contain a large population of massive stars, but its total mass is currently a matter of debate. While recent surveys have uncovered large numbers of OB...
The cool supergiant population of the massive young star cluster RSGC1 (2007)
Davies, Ben, Figer, Don F., Law, Casey J., Kudritzki, Rolf-Peter, Najarro, Francisco, Herrero, Artemio, ...
We present new high-resolution near-IR spectroscopy and OH maser observations to investigate the population of cool luminous stars of the young massive Galactic cluster RSGC1. Using the 2.293\micron...
A massive cluster of Red Supergiants at the base of the Scutum-Crux arm (2007)
Davies, Ben, Figer, Don F., Kudritzki, Rolf-Peter, MacKenty, John, Najarro, Francisco, Herrero, Artemio
We report on the unprecedented Red Supergiant (RSG) population of a massive young cluster, located at the base of the Scutum-Crux Galactic arm. We identify candidate cluster RSGs based on {\it 2MASS}...
Discovery of an extraordinarily massive cluster of red supergiants (2006)
Figer, Donald, MacKenty, John, Robberto, Massimo, Smith, Kester, Najarro, Francisco, Kudritzki, Rolf, ...
Also archived in: arXiv:astro-ph/0602146 v1 7 Feb 2006 AND Space Telescope Science Institute [STScI] Eprint #1712
Discovery of an Extraordinarily Massive Cluster of Red Supergiants (2006)
Figer, Donald F., MacKenty, John, Robberto, Massimo, Smith, Kester, Najarro, Francisco, Kudritzki, Rolf P., ...
We report the discovery of an extraordinarily massive young cluster of stars in the Galaxy, having an inferred total initial cluster mass comparable to the most massive young clusters in the Galaxy....
A period and a prediction for the Of ? p spectrum alternator HD 191612 (2004)
Walborn, Nolan R., Howarth, Ian D., Rauw, Grégor, Lennon, Daniel J., Bond, Howard E., Negueruela, Ignacio, ...
The observational picture of the enigmatic O-type spectrum variable HD 191612 has been sharpened substantially. A symmetrical, low-amplitude light curve with a period near 540 days has recently been...
A Period and a Prediction for the Of?p Spectrum Alternator HD 191612 (2004)
Walborn, Nolan R., Howarth, Ian D., Rauw, Gregor, Lennon, Daniel J., Bond, Howard E., Negueruela, Ignacio, ...
The observational picture of the enigmatic O-type spectrum variable HD191612 has been sharpened substantially. A symmetrical, low-amplitude light curve with a period near 540 d has recently been...
Quantitative spectral analysis of early B-type supergiants in the Sculptor galaxy NGC 300 (2003)
Urbaneja, Miguel Alejandro, Herrero, Artemio, Bresolin, Fabio, Kudritzki, Rolf-Peter, Gieren, Wolgang, Puls, Joachim
The spectra of two early B-type supergiant stars in the Sculptor spiral galaxy NGC 300 are analysed by means of non-LTE line blanketed unified model atmospheres, aimed at determining their chemical...
STIS UV spectroscopy of early B supergiants in M31 (2002)
Bresolin, Fabio, Kudritzki, Rolf-Peter, Lennon, Daniel J., Smartt, Stephen J., Herrero, Artemio, Urbaneja, Miguel A., ...
We analyze STIS spectra in the 1150-1700 Angstrom wavelength range obtained for six early B supergiants in the neighboring galaxy M31. Because of their likely high (nearly solar) abundance, these...