232 citations · 1.9k across the 46 of their papers we have counts for
16 papers · 1 filter
Infrared period-luminosity relations of Galactic Miras based on multi-epoch photometry and the Gaia parallax uncertainty
S. Uttenthaler, T. Lebzelter, S. Meingast
Miras and other long-period variable (LPV) stars on the AGB follow period-luminosity (PL) relations. These relations have been difficult to study for Galactic LPVs because their di…
The TW Hydrae Association is a cluster chain of Sco-Cen
N. Miret-Roig, J. Alves, S. Ratzenböck +9
The TW Hydrae Association (TWA) is a young local association (YLA) about 50 pc from the Sun, offering a unique opportunity to study star and planet formation processes in detail. W…
The star formation history of the Sco-Cen association. Coherent star formation patterns in space and time
Sebastian Ratzenböck, Josefa E. Großschedl, João Alves +13
We reconstruct the star formation history of the Sco-Cen OB association using a novel high-resolution age map of the region. We develop an approach to produce robust ages for Sco-C…
The Oph region revisited with Gaia EDR3
Natalie Grasser, Sebastian Ratzenböck, João Alves +10
Context. Young and embedded stellar populations are important probes of the star formation process. Paradoxically, we have a better census of nearby embedded young populations than…
3D dynamics of the Orion cloud complex -- Discovery of coherent radial gas motions at the 100-pc scale
Josefa E. Großschedl, João Alves, Stefan Meingast +1
We present the first study of the 3D dynamics of the gas in the entire southern Orion cloud complex. We used the parallaxes and proper motions of YSOs from Gaia DR2 as a proxy for…
AT 2019abn: multi-wavelength observations over the first 200 days
S. C. Williams, D. Jones, P. Pessev +8
AT 2019abn was discovered in the nearby M51 galaxy by the Zwicky Transient Facility at more than two magnitudes and around three weeks prior to its optical peak. We aim to conduct…
The CARMA-NRO Orion Survey: Core Emergence and Kinematics in the Orion A Cloud
Shuo Kong, Héctor G. Arce, Anneila I. Sargent +19
We have investigated the formation and kinematics of sub-mm continuum cores in the Orion A molecular cloud. A comparison between sub-mm continuum and near infrared extinction shows…
TYC 3637-1152-1 - a High Amplitude delta Scuti star with peculiar pulsational properties
Ernst Paunzen, Klaus Bernhard, Moriz Frauenberger +16
In some delta Scuti stars, only one or two radial modes are excited (usually the fundamental mode and/or first overtone mode) and the observed peak-to-peak amplitudes exceed 0.3 ma…
GD358: three decades of observations for the in-depth asteroseismology of a DBV star
Agnes Bischoff-Kim, J. L. Provencal, P. A. Bradley +38
We report on the analysis of 34 years of photometric observations of the pulsating helium atmosphere white dwarf GD358. The complete data set includes archival data from 1982-2006,…
VISION - Vienna survey in Orion. III. Young stellar objects in Orion A
Josefa E. Großschedl, João Alves, Paula S. Teixeira +14
We have extended and refined the existing young stellar object (YSO) catalogs for the Orion A molecular cloud, the closest massive star-forming region to Earth. This updated catalo…
Orion revisited III. The Orion Belt population
K. Kubiak, J. Alves, H. Bouy +11
This paper continues our study of the foreground population to the Orion molecular clouds. The goal is to characterize the foreground population north of NGC 1981 and to investigat…
Gas absorption and dust extinction towards the Orion Nebula Cluster
Birgit Hasenberger, Jan Forbrich, Joao Alves +4
We characterise the relation between the gas and dust content of the interstellar medium towards young stellar objects in the Orion Nebula Cluster. X-ray observations provide estim…
The Population of Compact Radio Sources in the Orion Nebula Cluster
Jan Forbrich, Victor M. Rivilla, Karl M. Menten +6
We present a deep centimeter-wavelength catalog of the Orion Nebula Cluster (ONC), based on a 30h single-pointing observation with the Karl G. Jansky Very Large Array in its high-r…
LX Cygni: A carbon star is born
S. Uttenthaler, S. Meingast, T. Lebzelter +5
Context: The Mira variable LX Cyg showed a dramatic increase of its pulsation period in the recent decades and appears to undergo an important transition in its evolution. Aims: We…
Pulsating stars in NGC 6231 Frequency analysis and photometric mode identification near the main sequence
Stefan Meingast, Gerald Handler, Robert R. Shobbrook
We used Johnson UBV photometric CCD observations to identify pulsating and other variable stars in the young open cluster NGC 6231. The multi-color information was used to classify…
New Beta Cephei stars in the young open cluster NGC 637
G. Handler, S. Meingast
Studying stellar pulsations in open clusters offers the possibility to perform ensemble asteroseismology. The reasonable assumption that the cluster members have the same age, dist…