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UV-to-NIR spectra of 8 Wolf-Rayet stars in LMC
Are WO-type Wolf-Rayet (WR) stars in the final stage of massive star evolution before core-collapse? Although WC- and WO-type WRs have very similar spectra, WOs show a much... -
Variability of Sgr A* in 2019 July
We report a timing analysis of near-infrared (NIR), X-ray, and submillimeter data during a 3 day coordinated campaign observing Sagittarius A. Data were collected at 4.5um with... -
Obs. of two transits of GJ 3470b with NEID
The warm Neptune GJ 3470b transits a nearby (d=29 pc) bright slowly rotating M1.5-dwarf star. Using spectroscopic observations during two transits with the newly commissioned... -
LBT/MODS spectrum of the host galaxy of GRB 200826A
Gamma-ray bursts (GRBs) are classified into long and short events. Long GRBs (LGRBs) are associated with the end states of very massive stars, while short GRBs (SGRBs) are... -
Young stars in the Galactic Center
We present a large ~30"x30" spectroscopic survey of the Galactic Center using the SINFONI IFU at the VLT. Combining observations of the last two decades we compile spectra of... -
Ly{beta} dark gaps in z<~6 QSOs spectra
We present a new investigation of the intergalactic medium near reionization using dark gaps in the Ly{beta} forest. With its lower optical depth, Ly{beta} offers a potentially... -
Spectral-line survey of SFR W51e1/e2 in 4mm range
We present the results of a spectral-line survey of the W51e1/e2 star-forming region at 68-88GHz. 79 molecules and their isotopologues were detected, from simple diatomic or... -
LC analysis of type I superluminous SNe
Recent work has revealed that the light curves of hydrogen-poor (TypeI) superluminous supernovae (SLSNe), thought to be powered by magnetar central engines, do not always follow... -
Member stars of TriAnd, ACS and MRi in the MW
We investigated the observational properties of Triangulum-Andromeda (TriAnd), Monoceros Ring (MRi), and Anti-Center Stream (ACS) in the anticenter region using K giants, M... -
Photometry and spectroscopy of ASASSN-17jz
We present observations of the extremely luminous but ambiguous nuclear transient (ANT) ASASSN-17jz, spanning roughly 1200 days of the object's evolution. ASASSN-17jz was... -
IRTF/SpeX and Spitzer/IRS spectra of beta Pictoris
While {beta} Pic is known to host silicates in ring-like structures, whether the properties of these silicate dust vary with stellocentric distance remains an open question. We... -
Brightest cluster galaxies from SDSS-IV MaNGA
Although it is generally accepted that massive galaxies form in a two-phased fashion, beginning with a rapid mass buildup through intense starburst activities followed by... -
F125W and UV mag of 6.0<z<8.2 galaxies candidates
Reionization is an inhomogeneous process, thought to begin in small ionized bubbles of the intergalactic medium (IGM) around overdense regions of galaxies. Recent Ly{alpha}... -
The ELM survey. IX. Low-mass SDSS+Gaia WD binaries
We present the discovery of 17 double white dwarf (WD) binaries from our ongoing search for extremely low mass (ELM) <0.3M_{sun} WDs, objects that form from binary evolution.... -
WISE-2MASS (W2M) quasars and red QSOs with sp.
We present a highly complete sample of broad-line (Type 1) QSOs out to z~3 selected by their mid-infrared colors, a method that is minimally affected by dust reddening. We... -
Follow-up LCO photometry & spectra of SN 2016dsg
A thermonuclear explosion triggered by a He-shell detonation on a carbon-oxygen white-dwarf core has been predicted to have strong UV line blanketing at early times due to the... -
Abundance analysis of 4 HES metal-poor stars
Elemental abundances of extrinsic carbon stars provide insight into the poorly understood origin and evolution of elements in the early Galaxy. In this work, we present the... -
UV and optical spectra of type IIP SN2021yja
We present three epochs of early-time ultraviolet (UV) and optical HST/STIS spectroscopy of the young, nearby Type IIP supernova (SN) 2021yja. We complement the HST data with... -
LCs and spectra of type Ia SN 2021aefx
We present high-cadence optical and ultraviolet light curves of the normal Type Ia supernova (SN) 2021aefx, which shows an early bump during the first two days of observation.... -
Deep uGMRT 250-850MHz view of Coma cluster galaxies
We present high-resolution, high-sensitivity upgraded Giant Metrewave Radio Telescope observations of the Coma cluster (A1656) at 250-500MHz and 550-850MHz. At 250-500MHz, 135...
