Zobrazeno 1 - 10
of 243
pro vyhledávání: '"Sellgren K"'
Autor:
Schultheis, M., Cunha, K., Zasowski, G., Pérez, A. E. García, Sellgren, K., Smith, V., García-Hernández, D. A., Zamora, O., Fritz, T. K., Anders, F., Prieto, C. Allende, Bizyaev, D., Kinemuchi, K., Pan, K., Malanushenko, E., Malanushenko, V., Shetrone, M. D.
Publikováno v:
A&A 584, A45 (2015)
The inner Galactic Bulge has, until recently, been avoided in chemical evolution studies due to extreme extinction and stellar crowding. Large, near-IR spectroscopic surveys, such as APOGEE, allow for the first time the measurement of metallicities i
Externí odkaz:
http://arxiv.org/abs/1509.07104
Autor:
Zasowski, G., Johnson, Jennifer A., Frinchaboy, P. M., Majewski, S. R., Nidever, D. L., Pinto, H. J. Rocha, Girardi, L., Andrews, B., Chojnowski, S. D., Cudworth, K. M., Jackson, K., Munn, J., Skrutskie, M. F., Beaton, R. L., Blake, C. H., Covey, K., Deshpande, R., Epstein, C., Fabbian, D., Fleming, S. W., Hernandez, A. Garcia, Herrero, A., Mahadevan, S., Meszaros, Sz., Schultheis, M., Sellgren, K., Terrien, R., van Saders, J., Prieto, C. Allende, Bizyaev, D., Burton, A., Cunha, K., da Costa, L. N., Hasselquist, S., Hearty, F., Holtzman, J., Perez, A. E. Garcia, Maia, M. A. G., O'Connell, R. W., O'Donnell, C., Pinsonneault, M., Santiago, B. X., Schiavon, R. P., Shetrone, M., Smith, V., Wilson, J. C.
The Apache Point Observatory Galactic Evolution Experiment (APOGEE) is a high-resolution infrared spectroscopic survey spanning all Galactic environments (i.e., bulge, disk, and halo), with the principal goal of constraining dynamical and chemical ev
Externí odkaz:
http://arxiv.org/abs/1308.0351
Autor:
Schultheis, M., Sellgren, K., Ramirez, S., Stolovy, S., Ganesh, S., Glass, I. S., Girardi, L.
We use the Spitzer IRAC catalogue of the Galactic Center (GC) point sources (Ramirez et al. 2008) and combine it with new isochrones (Marigo et al. 2008) to derive extinctions based on photometry of red giants and asymptotic giant branch (AGB) stars.
Externí odkaz:
http://arxiv.org/abs/0811.2902
Autor:
Arendt, R. G., Gezari, D. Y., Stolovy, S. R., Sellgren, K., Smith, R., Ramirez, S. V., Yusef-Zadeh, F., Law, C. J., Smith, H. A., Cotera, A. S., Moseley, S. H.
Publikováno v:
Astrophys.J. 685:958,2008
We have studied the correlation between 2357 Chandra X-ray point sources in a 40 x 40 parsec field and ~20,000 infrared sources we observed in the corresponding subset of our 2 x 1.4 degree Spitzer/IRAC Galactic Center Survey at 3.6-8.0 um, using var
Externí odkaz:
http://arxiv.org/abs/0806.1880
Autor:
Arendt, R. G., Stolovy, S. R., Ramírez, S. V., Sellgren, K., Cotera, A. S., Law, C. J., Yusef-Zadeh, F., Smith, H. A., Gezari, D. Y.
Publikováno v:
Astrophys.J.682:384-399,2008
A mid-infrared (3.6-8 um) survey of the Galactic Center has been carried out with the IRAC instrument on the Spitzer Space Telescope. This survey covers the central 2x1.4 degree (~280x200 pc) of the Galaxy. At 3.6 and 4.5 um the emission is dominated
Externí odkaz:
http://arxiv.org/abs/0804.4491
We discuss oxygen and iron abundance patterns in K and M red-giant members of the Galactic bulge and in the young and massive M-type stars inhabiting the very center of the Milky Way. The abundance results from the different bulge studies in the lite
Externí odkaz:
http://arxiv.org/abs/0710.0866
Publikováno v:
Astrophys.J.659:1338-1351,2007
We present 15 - 20 micron long-slit spectra, from the Infrared Spectrograph (IRS) on Spitzer, of NGC 7023. We observe recently-discovered interstellar emission features, at 15.9, 16.4, 17.0, 17.4, 17.8, and 18.9 microns, throughout the reflection neb
Externí odkaz:
http://arxiv.org/abs/astro-ph/0612544
Autor:
Peeples, Molly S., Bonanos, A. Z., DePoy, D. L., Stanek, K. Z., Pepper, J., Pogge, Richard W., Pinsonneault, M. H., Sellgren, K.
Publikováno v:
Astrophys.J.654:L61-L64,2006
We present a re-analysis of our H- and K-band photometry and light-curves for GCIRS 16SW, a regular periodic source near the Galactic center. These data include those presented by DePoy et al. (2004); we correct a sign error in their reduction, findi
Externí odkaz:
http://arxiv.org/abs/astro-ph/0610212
Publikováno v:
Astrophys.J.617:1127-1130,2004
We report measurements of the light curve of the variable Galactic Center source IRS16SW. The light curve is not consistent with an eclipsing binary or any other obvious variable star. The source may be an example of a high mass variable predicted th
Externí odkaz:
http://arxiv.org/abs/astro-ph/0408561
Autor:
Werner, M. W., Uchida, K. I., Sellgren, K., Marengo, M., Gordon, K. D., Morris, P. W., Houck, J. R., Stansberry, J. A.
Publikováno v:
Astrophys.J.Suppl.154:309-314,2004
We have observed the reflection nebula NGC 7023, with the Short-High module and long-slit Short-Low and Long-Low modules of the Infrared Spectrograph on the Spitzer Space Telescope. We also present Infrared Array Camera and Multiband Imaging Photomet
Externí odkaz:
http://arxiv.org/abs/astro-ph/0407213