Discovery of a Perseus-like cloud in the early Universe-H I-to-H2 transition, carbon monoxide and small dust grains at zabs≈ 2.53 towards the quasar J0000+ 0048

P Noterdaeme, JK Krogager, S Balashev, J Ge… - Astronomy & …, 2017 - aanda.org
We present the discovery of a molecular cloud at z abs≈ 2.5255 along the line of sight to the
quasar SDSS J 000015.17+ 004833.3. We use a high-resolution spectrum obtained with the …

Constraint on a cosmological variation in the proton-to-electron mass ratio from electronic CO absorption

M Daprà, ML Niu, EJ Salumbides… - The Astrophysical …, 2016 - iopscience.iop.org
Carbon monoxide (CO) absorption in the sub-damped Lyα absorber at redshift ${z} _
{\mathrm {abs}}\simeq 2.69$ toward the background quasar SDSS J123714. 60+ 064759.5 …

Precision measurements and test of molecular theory in highly excited vibrational states of H2 (v = 11)

TM Trivikram, ML Niu, P Wcisło, W Ubachs… - Applied Physics B, 2016 - Springer
Abstract Accurate EF^ 1\varSigma^+ _g-X^ 1\varSigma^+ _g EF 1 Σ g+-X 1 Σ g+ transition
energies in molecular hydrogen were determined for transitions originating from levels with …

[HTML][HTML] Communication: Test of quantum chemistry in vibrationally hot hydrogen molecules

ML Niu, EJ Salumbides, W Ubachs - The Journal of Chemical Physics, 2015 - pubs.aip.org
Precision measurements are performed on highly excited vibrational quantum states of
molecular hydrogen. The v= 12, J= 0− 3 rovibrational levels of H 2 (⁠ X 1 Σ g+⁠), lying only …

Spectroscopy and perturbation analysis of the CO A1Π −X1Σ+ (2,0), (3,0) and (4,0) bands

ML Niu, EJ Salumbides, AN Heays… - Molecular …, 2016 - Taylor & Francis
ABSTRACT The (2, 0)(3, 0) and (4, 0) bands of the A1Π− X1Σ+ system of 12C16O have
been re-investigated by high-resolution vacuum ultraviolet absorption spectroscopy. A …

Spectroscopy and perturbation analysis of the A1π (v=0) state of 13 C16 O

ML Niu, R Hakalla, TM Trivikram, AN Heays… - Molecular …, 2016 - Taylor & Francis
The lowest v= 0 level of the A1Π state of the 13C16O isotopologue of carbon monoxide has
been reinvestigated with a variety of high-resolution spectroscopic techniques. The A1Π …

Precision spectroscopy and comprehensive analysis of perturbations in the A1∏(v = 0) state of 13C18O

R Hakalla, TM Trivikram, AN Heays… - Molecular …, 2019 - Taylor & Francis
We have reinvestigated the A level of 13C18O using new high-resolution spectra obtained
via multi-photon laser excitation as well as with synchrotron-based Fourier-transform …

VIS and VUV spectroscopy of 12 C 17 O and deperturbation analysis of the A 1 Π, υ= 1–5 levels

R Hakalla, ML Niu, RW Field, EJ Salumbides… - RSC Advances, 2016 - pubs.rsc.org
High-accuracy dispersive optical spectroscopy measurements in the visible (VIS) region
have been performed on the less-abundant 12C17O isotopologue, observing high …

High-resolution Fourier-transform spectroscopy and deperturbation analysis of the A1Π (v= 1) level in 12C18O

MI Malicka, S Ryzner, AN Heays, N de Oliveira… - Journal of Quantitative …, 2020 - Elsevier
Abstract The A 1 Π (v= 1) level of the 12 C 18 O isotopologue was precisely reinvestigated
with two complementary spectroscopic techniques. High resolution B 1 Σ+→ A 1 Π (0, 1),(1 …

Perturbations in the A1Π, v = 0 state of 12C18O investigated via complementary spectroscopic techniques

TM Trivikram, R Hakalla, AN Heays, ML Niu… - Molecular …, 2017 - Taylor & Francis
ABSTRACT The A1Π (v= 0) level of 12C18O has been reinvestigated using three different
high-resolution spectroscopic methods:(1) 2+ 1′ resonance-enhanced multiphoton …