Zobrazeno 1 - 10
of 619
pro vyhledávání: '"Whelan, D."'
Autor:
Whelan, D. G., Chojnowski, S. D., Labadie-Bartz, J., Daglen, J., Hudson, K., Casey, G. M., Stringfellow, G. S., Lester, K. V., Barry, J., Heinerikson, J., Pankratz, D., Schreffler, M., Maderak, R., Lotspeich, N., Vitale-Sullivan, M., Woodard, M.
Prompted by X-ray detections from multiple surveys, we investigated the A-type star HD 63021 and found that it is a double-lined spectroscopic binary with highly variable emission associated with the primary star. Analysis of our multi-epoch spectros
Externí odkaz:
http://arxiv.org/abs/2011.11733
Autor:
Whelan, D. G., Privon, G. C., Beaton, R. L., Bentz, M., Chojnowski, S. D., Labadie-Bartz, J., Mace, G., Maderak, R., Majewski, S. R., Nidever, D., Webb, J.
In this State of the Profession Consideration, we will discuss the state of hands-on observing within the profession, including: information about professional observing trends; student telescope training, beginning at the undergraduate and graduate
Externí odkaz:
http://arxiv.org/abs/1907.05889
Autor:
Wisniewski, J. P., Chojnowski, S. D., Davenport, J. R. A., Bartz, J., Pepper, J., Whelan, D. G., Eikenberry, S. S., Lomax, J. R., Majewski, S. R., Richardson, N. D., Skrutskie, M.
The SDSS III APOGEE survey recently identified two new $\sigma$ Ori E type candidates, HD 345439 and HD 23478, which are a rare subset of rapidly rotating massive stars whose large (kGauss) magnetic fields confine circumstellar material around these
Externí odkaz:
http://arxiv.org/abs/1509.00128
Autor:
Zasowski, G., Chojnowski, S. Drew, Whelan, D. G., Miroshnichenko, A. S., Hernández, D. A. García, Majewski, S. R.
The molecular carriers of the ubiquitous absorption features called the diffuse interstellar bands (DIBs) have eluded identification for many decades, in part because of the enormous parameter space spanned by the candidates and the limited set of em
Externí odkaz:
http://arxiv.org/abs/1508.07015
Autor:
Lebouteiller, V., Sloan, G. C., Groenewegen, M. A. T., Matsuura, M., Riebel, D., Whelan, D. G., Bernard-Salas, J., Massey, P., Bayet, E.
We report the detection of oxygen-rich circumstellar envelopes in stars of the nearby (700 kpc) starburst galaxy IC 10. The star formation history and the chemical environment of this galaxy makes it an ideal target to observe dust production by high
Externí odkaz:
http://arxiv.org/abs/1209.1023
Autor:
Lebouteiller, V., Bernard-Salas, J., Whelan, D. G., Brandl, B., Galliano, F., Charmandaris, V., Madden, S., Kunth, D.
We investigate the emission properties of polycyclic aromatic hydrocarbons (PAHs) in various metallicity environments with the Infrared Spectrograph on board Spitzer. Local giant HII regions are used as references as they enable access to the distinc
Externí odkaz:
http://arxiv.org/abs/1012.1728
Autor:
Brandl, B. R., Snijders, L., Brok, M. den, Whelan, D. G., Groves, B., van der Werf, P., Charmandaris, V., Smith, J. D., Armus, L., Kennicutt, Jr., R. C., Houck, J. R.
Publikováno v:
Astrophys.J.699:1982-2001,2009
Using the Infrared Spectrograph on the Spitzer Space Telescope, we observed the Antennae galaxies obtaining spectral maps of the entire central region and high signal-to-noise 5-38 um spectra of the two galactic nuclei and six infrared-luminous regio
Externí odkaz:
http://arxiv.org/abs/0905.1058
Autor:
Lebouteiller, V., Bernard-Salas, J., Brandl, B., Whelan, D. G., Wu, Y., Charmandaris, V., Devost, D., Houck, J. R.
We investigate the chemical abundances of NGC3603 in the Milky Way, of 30Doradus in the Large Magellanic Cloud, and of N66 in the Small Magellanic Cloud. Mid-infrared observations with the Infrared Spectrograph onboard the Spitzer Space Telescope all
Externí odkaz:
http://arxiv.org/abs/0710.4549
Publikováno v:
Astrophys.J.666:896-902,2007
We present photometric and spectroscopic data of the interacting starburst galaxy NGC 6052 obtained with the Spitzer Space Telescope. The mid-infrared (MIR) spectra of the three brightest spatially resolved regions in the galaxy are remarkably simila
Externí odkaz:
http://arxiv.org/abs/0705.3800
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