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UV spectra of classical T Tauri stars
The far-ultraviolet (FUV; 912-1700 {AA}) radiation field from accreting central stars in classical T Tauri systems influences the disk chemistry during the period of giant... -
Stellar populations in the central 0.5pc. I.
We present new high angular resolution near-infrared spectroscopic observations of the nuclear star cluster surrounding the Milky Way's central supermassive black hole. Using... -
Radial velocities of massive stars in Cyg OB2
This work provides a statistical analysis of the massive star binary characteristics in the Cygnus OB2 association using radial velocity information of 114 B3-O5 primary stars... -
Upper Sco members rotational velocities
We present projected rotational velocities for 20 early-type (B8-A9) and 74 late-type (F2-M8) members of the ~5 Myr old Upper Scorpius OB Association derived from... -
GALEX ultraviolet halos around bright stars
We have discovered ultraviolet (UV) halos extending as far as 5{deg} around four (of six) bright UV stars using data from the Galaxy Evolution Explorer satellite. These halos... -
Sources in star-forming region Cyg-OB2 from X-ray
Cygnus OB2 is the nearest example of a massive star-forming region (SFR), containing over 50 O-type stars and hundreds of B-type stars. We have analyzed the properties of young... -
Diffuse interstellar bands. IV.
In a sample of 114 diffuse cloud sightlines spanning a wide range of interstellar environments, we find the equivalent widths of the diffuse interstellar bands (DIBs)... -
Spectroscopy of stars in the Galaxy's nuclear cluster
We report on the structure of the nuclear star cluster in the innermost 0.16pc of the Galaxy as measured by the number density profile of late-type giants. Using laser guide... -
Radio and UV spectra of HVC toward the MC
In the spectra of 139 early-type Large Magellanic Cloud (LMC) stars observed with Far Ultraviolet Spectroscopic Explorer and with deep radio Parkes HI 21cm observations along... -
Warped disks of YSOs in Galactic center
The central parsec around the supermassive black hole in the Galactic center (GC) hosts more than 100 young and massive stars. Outside the central cusp (R~1") the majority of... -
Radial velocities of stars in the Galactic Center
We present results from K-band slit scan observations of a ~20"x20" region of the Galactic center (GC) in two separate epochs more than 5 years apart. The high-resolution... -
Radial velocity survey of Cyg OB2 association
We conducted a radial velocity survey of the Cyg OB2 association over a 6yr (1999-2005) time interval to search for massive close binaries. During this time we obtained 1139... -
HD13189 equivalent widths and abundances
We report on the abundances of 13 elements in the planetary host HD 13189, a massive giant star. -
Young stellar objects in the NGC 1333
NGC 1333, a highly active star formation region within the Perseus molecular cloud complex, has been observed with the ACIS-I detector on board the Chandra X-Ray Observatory. In... -
RVel and BV photometry of 9 {gamma} Doradus stars
We have used precise photometric and high-dispersion spectroscopic observations to study nine candidate {gamma} Doradus ({gamma}Dor) stars, identified as optically variable... -
Resolving circumstellar environment of MWC137 .II.
The Galactic B[e] supergiant MWC137 is surrounded by a large-scale optical nebula. To shed light on the physical conditions and kinematics of the nebula, we analyze the optical... -
RI light curve of KELT-25 and KELT-26
We present the discoveries of KELT-25b (TIC 65412605, TOI-626.01) and KELT-26b (TIC 160708862, TOI-1337.01), two transiting companions orbiting relatively bright, early A stars.... -
Parameters of OB stars & their bow shock nebulae
Second only to initial mass, the rate of wind-driven mass loss determines the final mass of a massive star and the nature of its remnant. Motivated by the need to reconcile... -
Study of three early-type contact twin binaries
Three eclipsing binaries, CT Tau, GU Mon, and V701 Sco, are early-type contact binaries with infrared excess from circumbinary matter. We present the multi-color photometry for... -
{lambda} Bootis stars: the southern survey I.
The {lambda} Boo stars are a class of chemically peculiar Population I A-type stars characterized by under-abundances of the refractory elements, but near-solar abundances of...
