- ID:
- ivo://CDS.VizieR/J/MNRAS/465/3039
- Title:
- Eruptive variable protostars from VVV EW
- Short Name:
- J/MNRAS/465/3039
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- In a companion work (Contreras Pena et al., 2017MNRAS.465.3011C, Paper I), we detected a large population of highly variable Young Stellar Objects (YSOs) in the Vista Variables in the Via Lactea (VVV) survey, typically with class I or flat spectrum spectral energy distributions and diverse light-curve types. Here we present infrared spectra (0.9-2.5 {mu}m) of 37 of these variables, many of them observed in a bright state. The spectra confirm that 15/18 sources with eruptive light curves have signatures of a high accretion rate, either showing EXor-like emission features ({Delta}v=2 CO, Br{gamma}) and/or FUor-like features ({Delta}v=2 CO and H_2_O strongly in absorption). Similar features were seen in some long-term periodic YSOs and faders but not in dippers or short-term variables. The sample includes some dusty Mira variables (typically distinguished by smooth Mira-like light curves), two cataclysmic variables and a carbon star. In total, we have added 19 new objects to the broad class of eruptive variable YSOs with episodic accretion. Eruptive variable YSOs in our sample that were observed at bright states show higher accretion luminosities than the rest of the sample. Most of the eruptive variables differ from the established FUor and EXor subclasses, showing intermediate outburst durations and a mixture of their spectroscopic characteristics. This is in line with a small number of other recent discoveries. Since these previously atypical objects are now the majority amongst embedded members of the class, we propose a new classification for them as MNors. This term (pronounced emnor) follows V1647 Ori, the illuminating star of McNeil's Nebula.
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Search Results
5672. ER Vulpeculae
- ID:
- ivo://CDS.VizieR/J/A+A/291/110
- Title:
- ER Vulpeculae
- Short Name:
- J/A+A/291/110
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- (no description available)
5673. ESA PANGAEA-X 2017
- ID:
- ivo://jacobsuni/pangaea_x_2017/q/epn_core
- Title:
- ESA PANGAEA-X 2017
- Date:
- 15 May 2018 11:28:09
- Publisher:
- epn1
- Description:
- Drone-based ohotogrammetric survey raw data from ESA PANGAEA-X 2017 planetary anlogue campaign - Data collected on 2017-11-19
5674. ESA PSA EPNTAP
- ID:
- ivo://esavo/psa/epntap
- Title:
- ESA PSA EPNTAP
- Short Name:
- PSA
- Date:
- 07 Feb 2024 10:21:35
- Publisher:
- European Space Agency
- Description:
- This service provides access to observations and catalogs from the ESA Planetary Science Archive hosted at the ESAC Science Data Centre
5675. ESASky Legacy TAP
- ID:
- ivo://esavo/esaskylegacy/tap
- Title:
- ESASky Legacy TAP
- Short Name:
- ESASky Legacy
- Date:
- 07 Feb 2024 10:12:09
- Publisher:
- European Space Agency
- Description:
- ESASky legacy is a TAP service to provide the community with complete, self-standing catalogues and data collections from ESA legacy astronomy missions, ensuring long-term preservation. This service provides a unified access to data products and their successors that can be exposed by ESASky.
5676. ESASky TAP
- ID:
- ivo://esavo/esasky/tap
- Title:
- ESASky TAP
- Short Name:
- ESASky
- Date:
- 07 Feb 2024 10:11:18
- Publisher:
- European Space Agency
- Description:
- ESASky is a science-driven discovery portal providing full access to the entire sky as observed with all ESA Space astronomy missions. This service provides access to catalogues, observations, and spectra hosted at the ESAC Science Data Centre.
- ID:
- ivo://CDS.VizieR/J/A+A/451/881
- Title:
- ESIS BVR catalog, ELAIS-S1
- Short Name:
- J/A+A/451/881
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The ESO-Spitzer extragalactic Imaging Survey (ESIS) is the optical follow up of the Spitzer Wide-Area InfraRed Extragalactic (SWIRE) survey in the ELAIS-S1 area. The multiwavelength study of galaxy emission is the key to understand the interplay of the various components of galaxies and to trace their role in cosmic evolution. ESIS provides optical identification and colors of Spitzer IR galaxies and builds the bases for photometric redshift estimates. This paper presents B, V, R Wide Field Imager observations of the first 1.5 square degree of the ESIS survey. Data reduction includes astrometric calibration, illumination and color corrections. Synthetic sources are simulated in scientific and super-sky-flat images, with the purpose of estimating completeness and photometric accuracy for the survey. Number counts and color distributions are compared to literature observational and theoretical data, including non-evolutionary, PLE, evolutionary and semi-analytic Lambda-CDM galaxy models, as well as Milky Way stellar predictions. Object coordinates are defined with an accuracy as good as ~0.15" rms with respect to GSC 2.2; flux uncertainties are ~2, 10, 20% at mag. 20, 23, 24 respectively (Vega); we reach 95% completeness at B, V~25 and R~24.5. ESIS galaxy number counts are in good agreement with previous works and are best reproduced by evolutionary and hierarchical Lambda-CDM scenarios.
- ID:
- ivo://CDS.VizieR/J/A+A/488/533
- Title:
- ESIS VIMOS I,z photometry of ELAIS-S1
- Short Name:
- J/A+A/488/533
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The ESO-Spitzer Imaging extragalactic Survey (ESIS) is the optical follow up of the Spitzer Wide-area Infra-Red Extragalactic survey (SWIRE) in the ELAIS-S1 region of the sky. We present VIMOS I and z band imaging belonging to the ESIS survey. A total of ~4 square degrees were targeted in I and ~1 in z. Accurate data processing includes removal of fringing, and mosaicking of the complex observing pattern. Completeness levels and photometric uncertainties are estimated through simulations. More than 300000 galaxies have been detected in the I band and ~50000 in the z band. Object coordinates are defined within an uncertainty of ~0.2" r.m.s., with respect to GSC 2.2. We reach a 90% average completeness at 23.1 and 22.5mag (Vega) in the I and z bands, respectively.
- ID:
- ivo://CDS.VizieR/J/MNRAS/496/3912
- Title:
- 1ES 2344+514 Multi-wavelength stud
- Short Name:
- J/MNRAS/496/3912
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Extreme High-frequency BL Lacs (EHBL) feature their synchrotron peak of the broadband spectral energy distribution (SED) at {nu}_s_>=10^17^Hz. The BL Lac object 1ES 2344+514 was included in the EHBL family because of its impressive shift of the synchrotron peak in 1996. During the following years, the source appeared to be in a low state without showing any extreme behaviours. In August 2016, 1ES 2344+514 was detected with the ground-based {gamma}-ray telescope FACT during a high {gamma}-ray state, triggering multi-wavelength (MWL) observations. We studied the MWL light curves of 1ES 2344+514 during the 2016 flaring state, using data from radio to VHE {gamma} rays taken with OVRO, KAIT, KVA, NOT, some telescopes of the GASP-WEBT collaboration at the Teide, Crimean, and St. Petersburg observatories, Swift-UVOT, Swift-XRT, Fermi-LAT, FACT and MAGIC. With simultaneous observations of the flare, we built the broadband SED and studied it in the framework of a leptonic and an hadronic model. The VHE {gamma}-ray observations show a flux level of 55% of the Crab Nebula flux above 300GeV, similar to the historical maximum of 1995. The combination of MAGIC and Fermi-LAT spectra provides an unprecedented characterization of the inverse-Compton peak for this object during a flaring episode. The {GAMMA} index of the intrinsic spectrum in the VHE {gamma}-ray band is 2.04+/-0.12stat+/-0.15sys. We find the source in an extreme state with a shift of the position of the synchrotron peak to frequencies above or equal to 10^18^Hz
- ID:
- ivo://CDS.VizieR/J/A+A/444/365
- Title:
- ESO Distant Cluster Survey, EDisCS
- Short Name:
- J/A+A/444/365
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present the ESO Distant Cluster Survey (EDisCS) a survey of 20 distant galaxy clusters with redshifts ranging from 0.4 to 0.8. Candidate clusters were chosen from among the brightest objects identified in the Las Campanas Distant Cluster Survey (LCDCS), half with estimated redshift z_est_~0.5 and half with z_est_~0.8. They were confirmed by identifying red sequences in moderately deep two colour data from VLT/FORS2. For confirmed candidates we have assembled deep three-band optical photometry using VLT/FORS2, deep near-infrared photometry in one or two bands using NTT/SOFI, deep optical spectroscopy using VLT/FORS2, wide field imaging in two or three bands using the ESO Wide Field Imager, and HST/ACS mosaic images for 10 of the most distant clusters. This first paper presents our sample and the VLT photometry we have obtained. We present images, colour magnitude diagrams and richness estimates for our clusters, as well as giving redshifts and positions for the brightest cluster members. Subsequent papers will present our infrared photometry, spectroscopy, HST and wide-field imaging, as well as a wealth of further analysis and science results. Our reduced data become publicly available as these papers are accepted.