Zobrazeno 1 - 10
of 76
pro vyhledávání: '"Hanes, David"'
Autor:
Fantin, Nicholas J., Côté, Patrick, Hanes, David A., Gwyn, S. D. J., Bianchi, Luciana, Ferrarese, Laura, Cuillandre, Jean-Charles, McConnachie, Alan, Starkenburg, Else
We use three different techniques to identify hundreds of white dwarf (WD) candidates in the Next Generation Virgo Cluster Survey (NGVS) based on photometry from the NGVS and GUViCS, and proper motions derived from the NGVS and the Sloan Digital Sky
Externí odkaz:
http://arxiv.org/abs/1706.07437
Autor:
Sikora, James, Wade, Gregg, Bohlender, David, Shultz, Matt, Adelman, Saul, Alecian, Evelyne, Hanes, David, Monin, Dmitry, Neiner, Coralie, MiMeS, the, Collaborations, BinaMIcS
We present our analysis of HD~35502 based on high- and medium-resolution spectropolarimetric observations. Our results indicate that the magnetic B5IVsnp star is the primary component of a spectroscopic triple system and that it has an effective temp
Externí odkaz:
http://arxiv.org/abs/1605.01353
Autor:
Pota, Vincenzo, Brodie, Jean P., Bridges, Terry, Strader, Jay, Romanowsky, Aaron J., Villaume, Alexa, Jennings, Zachary, Faifer, Favio R., Pastorello, Nicola, Forbes, Duncan A., Campbell, Ainsley, Usher, Christopher, Foster, Caroline, Spitler, Lee R., Caldwell, Nelson, Forte, Juan C., Norris, Mark A., Zepf, Stephen E., Beasley, Michael A., Gebhardt, Karl, Hanes, David A., Sharples, Ray M., Arnold, Jacob A.
We present new wide-field photometry and spectroscopy of the globular clusters (GCs) around NGC 4649 (M60), the third brightest galaxy in the Virgo cluster. Imaging of NGC 4649 was assembled from a recently-obtained HST/ACS mosaic, and new Subaru/Sup
Externí odkaz:
http://arxiv.org/abs/1503.07520
Autor:
Norris, Mark A., Gebhardt, Karl, Sharples, Ray M., Faifer, Favio Raul, Bridges, Terry, Forbes, Duncan A., Forte, Juan C., Zepf, Stephen E., Beasley, Michael A., Hanes, David A., Proctor, Robert, Kannappan, Sheila J.
This paper presents further results from our spectroscopic study of the globular cluster (GC) system of the group elliptical NGC 3923. From observations made with the GMOS instrument on the Gemini South telescope, an additional 50 GC and Ultra Compac
Externí odkaz:
http://arxiv.org/abs/1201.0996
Autor:
Shultz, Matthew, Wade, Gregg, Bagnulo, Stefano, Landstreet, John, Grunhut, Jason, Hanes, David, Collaboration, the MiMeS
Recently announced magnetic models for four SPB and {\beta} Cep stars, along with magnetic detections for two additional stars, have potentially doubled the number of known magnetic SPB and \beta Cep stars (see Grunhut et al., these proceedings). We
Externí odkaz:
http://arxiv.org/abs/1109.5436
Autor:
Faifer, Favio R., Forte, Juan C., Norris, Mark A., Bridges, Terry, Forbes, Duncan A., Zepf, Stephen E., Beasley, Mike, Gebhardt, Karl, Hanes, David A., Sharples, Ray M.
This paper presents deep high quality photometry of globular cluster (GC) systems belonging to five early-type galaxies covering a range of mass and environment. Photometric data were obtained with the Gemini North and Gemini South telescopes in the
Externí odkaz:
http://arxiv.org/abs/1105.1755
We report the systematic detection of magnetic fields in massive (M > 5 M$_\odot$) late-type supergiants, using spectropolarimetric observations obtained with ESPaDOnS at the Canada-France-Hawaii Telescope. Our observations reveal detectable Stokes V
Externí odkaz:
http://arxiv.org/abs/1006.5891
Autor:
Norris, Mark A., Sharples, Ray M., Bridges, Terry, Gebhardt, Karl, Forbes, Duncan A., Proctor, Robert, Faifer, Favio Raul, Forte, Juan Carlos, Beasley, Michael A., Zepf, Stephen E., Hanes, David A.
We present a technique to extract ultra-deep diffuse-light spectra from the standard multi-object spectroscopic observations used to investigate extragalactic globular cluster (GC) systems. This technique allows a clean extraction of the spectrum of
Externí odkaz:
http://arxiv.org/abs/0712.1818
Autor:
Pierce, Michael, Bridges, Terry, Forbes, Duncan A., Proctor, Robert, Beasley, Michael A., Gebhardt, Karl, Faifer, Favio Raul, Forte, Juan Carlos, Zepf, Stephen E., Sharples, Ray, Hanes, David A.
Publikováno v:
Mon.Not.Roy.Astron.Soc. 368 (2006) 325-334
NGC 4649 (M60) is one of a handful of giant Virgo ellipticals. We have obtained Gemini/GMOS spectra for 38 GCs associated with this galaxy. Applying the multi-index chi^2 minimisation technique of Proctor & Sansom (2002) with the single stellar popul
Externí odkaz:
http://arxiv.org/abs/astro-ph/0601531
Autor:
Pierce, Michael, Beasley, Michael A., Forbes, Duncan A., Bridges, Terry, Gebhardt, Karl, Faifer, Favio Raul, Forte, Juan Carlos, Zepf, Stephen E., Sharples, Ray, Hanes, David A., Proctor, Robert
Publikováno v:
Mon.Not.Roy.Astron.Soc.366:1253-1264,2006
We have obtained Gemini/GMOS spectra for 22 GCs associated with NGC 3379. We derive ages, metallicities and alpha-element abundance ratios from simple stellar population models using the multi-index chi^2 minimisation method of Proctor & Sansom (2002
Externí odkaz:
http://arxiv.org/abs/astro-ph/0510838