Publications (26)
The young HD 73583 (TOI-560) planetary system: Two 10-M mini-Neptunes transiting a 500-Myr-old, bright, and active K dwarf
O. Barragán, D. J. Armstrong, D. Gandolfi +103
We present the discovery and characterisation of two transiting planets observed by \textit{TESS} in the light curves of the young and bright (V=9.67) star HD73583 (TOI-560). We pe…
Modeling the Heating and Cooling of WZ Sagittae following the July 2001 Outburst
P. Godon, E. M. Sion, F. Cheng +5
FUSE and HST/STIS spectra of the dwarf nova WZ Sge, obtained during and following the early superoutburst of July 2001 over a time span of 20 months, monitor changes in the compone…
Measurement of dijet transverse momentum imbalance and azimuthal acoplanarity in + collisions at GeV with the sPHENIX detector
sPHENIX Collaboration, M. I. Abdulhamid, U. Acharya +326
This Letter reports on measurements of dijet transverse momentum () imbalance and azimuthal acoplanarity in proton-proton collisions at ~GeV, using da…
SN2017jgh - A high-cadence complete shock cooling lightcurve of a SN IIb with the Kepler telescope
P. Armstrong, B. E. Tucker, A. Rest +69
SN 2017jgh is a type IIb supernova discovered by Pan-STARRS during the C16/C17 campaigns of the Kepler/K2 mission. Here we present the Kepler/K2 and ground based observations of SN…
K2 Observations of SN 2018oh Reveal a Two-Component Rising Light Curve for a Type Ia Supernova
G. Dimitriadis, R. J. Foley, A. Rest +145
We present an exquisite, 30-min cadence Kepler (K2) light curve of the Type Ia supernova (SN Ia) 2018oh (ASASSN-18bt), starting weeks before explosion, covering the moment of explo…
Measurement of charged hadron multiplicity in Au+Au collisions at GeV with the sPHENIX detector
sPHENIX Collaboration, M. I. Abdulhamid, U. Acharya +302
The pseudorapidity distribution of charged hadrons produced in Au+Au collisions at a center-of-mass energy of GeV is measured using data collected by t…
The CARMENES search for exoplanets around M dwarfs -- LP 714-47b (TOI 442.01): Populating the Neptune desert
S. Dreizler, I., J. +134
We report the discovery of a Neptune-like planet (LP 714-47 b, P = 4.05204 d, m_b = 30.8 +/- 1.5 M_earth , R_b = 4.7 +/- 0.3 R_earth ) located in the 'hot Neptune desert'. Confirma…
High spectral and time resolution observations of the eclipsing polar RX J0719.2+6557
G. H. Tovmassian, P. Szkody, J. Greiner +7
We present phase-resolved spectral and multicolor CCD-photometric observations of the eclipsing polar RX J0719.2+6557 obtained with relatively high time (~600 sec/15 sec) and spect…
A super-Earth and a mini-Neptune near the 2:1 MMR straddling the radius valley around the nearby mid-M dwarf TOI-2096
F. J. Pozuelos, M. Timmermans, B. V. Rackham +72
Several planetary formation models have been proposed to explain the observed abundance and variety of compositions of super-Earths and mini-Neptunes. In this context, multitransit…
A Quintuple Star System Containing Two Eclipsing Binaries
S. Rappaport, H. Lehmann, B. Kalomeni +12
We present a quintuple star system that contains two eclipsing binaries. The unusual architecture includes two stellar images separated by 11" on the sky: EPIC 212651213 and EPIC 2…
A Jovian planet in an eccentric 11.5 day orbit around HD1397 discovered by TESS
L. D. Nielsen, F. Bouchy, O. Turner +36
The Transiting Exoplanet Survey Satellite TESS has begun a new age of exoplanet discoveries around bright host stars. We present the discovery of HD 1397b (TOI-120.01), a giant pla…
Polars -- multisite emission -- multiwavelength observation
Axel D. Schwope, K. Beuermann, D. A. H. Buckley +12
We review the main observational characteristics of AM Herculis stars (polars) at X-ray, EUV, UV, IR and optical wavelengths. Particular emphasis is given to multi-epoch, multi-wav…
ST/STIS Spectroscopy of the White Dwarfs in the Short-Period Dwarf Novae LL And and EF Peg
S. Howell, B. Gansicke, P. Szkody +1
We present new HST/STIS observations of the short-period dwarf novae LL And and EF Peg during deep quiescence. We fit stellar models to the UV spectra and use optical and IR observ…
Two temperate super-Earths transiting a nearby late-type M dwarf
L. Delrez, C. A. Murray, F. J. Pozuelos +82
In the age of JWST, temperate terrestrial exoplanets transiting nearby late-type M dwarfs provide unique opportunities for characterising their atmospheres, as well as searching fo…
Photometric and Spectroscopic Properties of Type Ia Supernova 2018oh with Early Excess Emission from the 2 Observations
W. Li, X. Wang, J. Vinkó +160
Supernova (SN) 2018oh (ASASSN-18bt) is the first spectroscopically-confirmed type Ia supernova (SN Ia) observed in the field. The data revealed an excess emission…
HST/STIS spectroscopy of the exposed white dwarf in the short-period dwarf nova EK TrA
B. T. Gaensicke, P. Szkody, E. M. Sion +4
We present high resolution Hubble Space Telescope ultraviolet spectroscopy of the dwarf nova EK TrA obtained in deep quiescence. The Space Telescope Imaging Spectrograph data revea…
Giant Outer Transiting Exoplanet Mass (GOTEM) Survey.VII. TOI-6041: a multi-planet system including a warm Neptune exhibiting strong TTVs
N. Heidari, A. Alnajjarine, H. P. Osborn +101
We present the characterization of the TOI-6041 system, a bright () G7-type star hosting at least two planets. The inner planet, TOI-6041b, is a warm Neptune wit…
Measurement of isolated prompt photon production in + collisions at GeV with the sPHENIX detector
sPHENIX Collaboration, M. I. Abdulhamid, U. Acharya +217
The differential cross section of isolated prompt photon production is measured as a function of photon transverse energy () in proton--proton (+) collisio…
TOI-1801 b: A temperate mini-Neptune around a young M0.5 dwarf
M. MallorquÃn, E. Goffo, E. Pallé +79
We report the discovery, mass, and radius determination of TOI-1801 b, a temperate mini-Neptune around a young M dwarf. TOI-1801 b was observed in TESS sectors 22 and 49, and the a…
HATS-74Ab, HATS-75b, HATS-76b and HATS-77b: Four Transiting Giant Planets around K and M Dwarfs
A. Jordán, J. D. Hartman, D. Bayliss +32
The relative rarity of giant planets around low mass stars compared with solar-type stars is a key prediction from core accretion planet formation theory. In this paper we report o…
Seeing Double: ASASSN-18bt Exhibits a Two-Component Rise in the Early-Time K2 Light Curve
B. J. Shappee, T. W. -s. Holoien, M. R. Drout +109
On 2018 Feb. 4.41, the All-Sky Automated Survey for SuperNovae (ASAS-SN) discovered ASASSN-18bt in the K2 Campaign 16 field. With a redshift of z=0.01098 and a peak apparent magnit…
Dynamical constraints on the component masses of the cataclysmic variable WZ Sge
D. Steeghs, S. Howell, C. Knigge +3
We present phase-resolved spectroscopy of the short period cataclysmic variable WZ Sge obtained with the Hubble Space Telescope. We were able to resolve the orbital motion of a num…
A New Cataclysmic Variable RX J0757.0+6306: Candidate for the Shortest Period Intermediate Polar
G. H. Tovmassian, J. Greiner, P. Kroll +8
A new cataclysmic variable is identified as the optical counterpart of the faint and hard X-ray source RX J0757.0+6306 discovered during the ROSAT all-sky survey. Strong double-pea…
A search for Be stars in multiple systems within the solar neighborhood
V. M. Kalari, R. Salinas, C. Saez-Carvajal +9
Be stars are widely considered to be the product of binary interaction. However, whether all Be stars are formed via binary interaction is unclear, and detailed estimates of the mu…
Measurement of the transverse energy density in Au+Au collisions at GeV with the sPHENIX detector
sPHENIX Collaboration, M. I. Abdulhamid, U. Acharya +302
This paper reports measurements of the transverse energy per unit pseudorapidity () produced in Au+Au collisions at GeV, performed with the sPHENI…
New X-ray observations of the old nova CP Puppis and of the more recent nova V351 Pup
M. Orio, K. Mukai, A. Bianchini +2
We present X-ray observations of the field containing Nova Puppis 1942 (CP Pup) and Nova Puppis 1991 (V351 Pup), done with ASCA in 1998, and with XMM-Newton in 2005. The X-ray and…