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NEOWISE variability analysis of ATLASGAL sources
This study focuses on the analysis of mid-infrared variability in a sample of high-mass young stellar objects (YSOs) associated with the cataloged sources from the APEX... -
Globular clusters from CFHT/MegaCam ugi obs. of M104
M104 (NGC 4594, the Sombrero galaxy) is a mysterious massive early-type galaxy that shows a dominant bulge and a prominent disk. However, the presence of a halo in M104 has been... -
Stellar contents in the Sh2-112 cloud complex
We present the star formation activity around the emission nebula Sh2-112. At a distance of ~2.1kpc, this HII complex, itself 3pc in radius, is illuminated by the massive star... -
NIR spectrum of the red L/T VHS J183135.58-551355.9
We present the discovery of VHS J183135.58-551355.9, an L/T transition dwarf identified as a result of its unusually red near-infrared colors (J-K_S_=3.633+/-0.277mag;... -
Candidate YSOs from JWST ERO obs. of NGC 3324
Among the first observations released to the public from the JWST was a section of the star-forming region NGC 3324 known colloquially as the "Cosmic Cliffs." We build a... -
Star clusters study in PHANGS-HST galaxies
Using PHANGS-HST NUV-U-B-V-I imaging of 17 nearby spiral galaxies, we study samples of star clusters and stellar associations, visually selected to be bright and relatively... -
Measurements of GRB afterglows with GROND
A dedicated gamma-ray burst (GRB) afterglow observing program was performed between 2007 and 2016 with GROND, a seven-channel optical and near-infrared imager at the 2.2m... -
BH masses for AGNs behind the MCs from MQS & OGLE
We use the spectroscopic data collected by the Magellanic Quasars Survey (MQS) and the photometric V- and I-band data from the Optical Gravitational Lensing Experiment (OGLE) to... -
r-band LC of the millisecond pulsar PSR J1555-2908
We report the discovery of PSR J1555-2908, a 1.79ms radio and gamma-ray pulsar in a 5.6hr binary system with a minimum companion mass of 0.052M_{sun}_. This fast and energetic... -
SN 2018jmt and SN 2019cj opt and NIR obs. mag.
We present optical and near-infrared observations of two Type Ibn supernovae (SNe), SN 2018jmt and SN 2019cj. Their light curves have rise times of about 10 days, reaching an... -
Metallicities of red giants in S-PLUS
The aim of this study is to obtain metallicities of red giant stars from the Southern Photometric Local Universe Survey (S-PLUS) and to classify giant and dwarf stars using... -
Extreme emission-line galaxies at z~4-9
Extreme emission line galaxies (EELGs) are typically characterized by high equivalent widths (EWs) which are driven by elevated specific star formation rates (sSFR) in low-mass... -
AT 2019qyl UV-to-IR photometry and spectroscopy
Nova eruptions, thermonuclear explosions on the surfaces of white dwarfs (WDs), are now recognized to be among the most common shock-powered astrophysical transients. We present... -
CFHT monitoring of M67 & members from Gaia EDR3
We present stellar rotation periods for late K- and early M-dwarf members of the 4Gyr old open cluster M67 as calibrators for gyrochronology and tests of stellar spin-down... -
Merger-AGN connection in the NW-2 field
Galaxy mergers represent a fundamental physical process under hierarchical structure formation, but their role in triggering active galactic nuclei (AGNs) is still unclear. We... -
SNe Ia type LF study
We construct the Type Ia supernovae (SNe Ia) luminosity function (LF) using the Zwicky Transient Facility Bright Transient Survey (BTS) catalogue. While this magnitude-limited... -
Nearby RR Lyrae stars RV and VK photometry
The Baade-Wesselink method, also known as the pulsation parallax method allows us to estimate distances to individual pulsating stars. Accurate geometric parallaxes obtained by... -
Binarity at LOw Metallicity (BLOeM). I.
Surveys in the Milky Way and Large Magellanic Cloud have revealed that the majority of massive stars will interact with companions during their lives. However, knowledge of the... -
Membership study of 70 stars clusters
Spectroscopy from the final internal data release of the Gaia-ESO Survey (GES) has been combined with Gaia EDR3 to assign membership probabilities to targets observed towards 63... -
The solar neighborhood LI. RECONS & TESS obs.
We present the optical photometric variability of 32 planet-hosting M dwarfs within 25pc over timescales of months to decades. The primary goal of this project-A Trail to Life...
