Search Publications
Dust Heating Sources in Galaxies: The Case of M33 (HERM33ES)
Boquien, M.; Calzetti, D.; van der Werf, P. +8 more
Dust emission is one of the main windows to the physics of galaxies and to star formation as the radiation from young, hot stars is absorbed by the dust and reemitted at longer wavelengths. The recently launched Herschel satellite now provides a view of dust emission in the far-infrared at an unequaled resolution and quality up to 500 µm. In…
The Be Star Spectra (BeSS) Database
Neiner, C.; Floquet, M.; de Batz, B. +3 more
Be stars vary on many timescales, from hours to decades. A long time base of observations to analyze certain phenomena in these stars is therefore necessary. Collecting all existing and future Be star spectra into one database has thus emerged as an important tool for the Be star community. Moreover, for statistical studies, it is useful to have c…
An Ultraviolet Spectroscopic Atlas of Local Starbursts and Star-forming Galaxies: The Legacy of FOS and GHRS
Heckman, Timothy M.; Calzetti, Daniela; Leitherer, Claus +1 more
We present 46 rest-frame ultraviolet (UV) spectra of 28 local starburst and star-forming galaxies which were observed with the Faint Object Spectrograph (FOS) and the Goddard High Resolution Spectrograph (GHRS) of the Hubble Space Telescope (HST) at a spectral resolution of a few 100 km s-1. We compare the HST spectra with lower resolut…
Observations of Binary Stars with the Differential Speckle Survey Instrument. II. Hipparcos Stars Observed in 2010 January and June
Howell, Steve B.; Ciardi, David R.; Horch, Elliott P. +4 more
The results of 497 speckle observations of Hipparcos stars and selected other targets are presented. Of these, 367 were resolved into components and 130 were unresolved. The data were obtained using the Differential Speckle Survey Instrument at the WIYN 3.5 m Telescope. (The WIYN Observatory is a joint facility of the University of Wisconsin-Madis…
Stellar Activity in the Broadband Ultraviolet
Findeisen, K.; Hillenbrand, L.; Soderblom, D.
The completion of the GALEX All-Sky Survey in the ultraviolet allows activity measurements to be acquired for many more stars than is possible with the limited sensitivity of ROSAT or the limited sky coverage of Chandra, XMM, or spectroscopic surveys for line emission in the optical or ultraviolet. We have explored the use of GALEX photometry as a…
The Initial Mass Function and Disk Frequency of the ρ Ophiuchi Cloud: An Extinction-limited Sample
Meyer, Michael R.; Erickson, Kristen L.; Wilking, Bruce A. +2 more
We have completed an optical spectroscopic survey of an unbiased, extinction-limited sample of candidate young stars covering 1.3 deg2 of the ρ Ophiuchi star-forming region. While infrared, X-ray, and optical surveys of the cloud have identified many young stellar objects (YSOs), these surveys are biased toward particular stages of stel…
PTF10nvg: An Outbursting Class I Protostar in the Pelican/North American Nebula
Filippenko, Alexei V.; Cenko, S. Bradley; Law, Nicholas M. +28 more
During a synoptic survey of the North American Nebula region, the Palomar Transient Factory (PTF) detected an optical outburst (dubbed PTF10nvg) associated with the previously unstudied flat or rising spectrum infrared source IRAS 20496+4354. The PTF R-band light curve reveals that PTF10nvg brightened by more than 5 mag during the current outburst…
Spitzer Infrared Spectrometer 16 µm Observations of the Goods Fields
Papovich, Casey; Dickinson, Mark; Teplitz, Harry I. +13 more
We present Spitzer 16 µm imaging of the Great Observatories Origins Deep Survey (GOODS) fields. We survey 150 arcmin2 in each of the two GOODS fields (North and South), to an average 3σ depth of 40 and 65 µJy, respectively. We detect ~1300 sources in both fields combined. We validate the photometry using the 3-24 µm sp…
Evolution of X-ray and Far-ultraviolet Disk-dispersing Radiation Fields
Briceño, Cesar; Hartmann, Lee; Calvet, Nuria +5 more
We present new X-ray and far-ultraviolet (FUV) observations of T Tauri stars covering the age range 1-10 Myr. Our goals are to observationally constrain the intensity of radiation fields responsible for evaporating gas from the circumstellar disk and to assess the feasibility of current photoevaporation models, focusing on X-ray and UV radiation. …
KK 246: A Dwarf Galaxy with an Extended H I Disk in the Local Void
Kreckel, K.; van der Hulst, J. M.; van Gorkom, J. H. +2 more
We have found that KK 246, the only confirmed galaxy located within the nearby Tully Void, is a dwarf galaxy with an extremely extended H I disk and signs of an H I cloud with anomalous velocity. It also exhibits clear misalignment between the kinematical major and minor axes, indicative of an oval distortion, and a general misalignment between th…