Deutsch
 
Hilfe Datenschutzhinweis Impressum
  DetailsucheBrowse

Datensatz

 
 
DownloadE-Mail
  The curious case of PHL 293B: A long-lived transient in a metal-poor blue compact dwarf galaxy

Burke, C. J., Baldassare, V. F., Liu, X., Foley, R. J., Shen, Y., Palmese, A., et al. (2020). The curious case of PHL 293B: A long-lived transient in a metal-poor blue compact dwarf galaxy. The Astrophysical Journal Letters, 894(1): L5. doi:10.3847/2041-8213/ab88de.

Item is

Basisdaten

einblenden: ausblenden:
Genre: Zeitschriftenartikel

Dateien

einblenden: Dateien
ausblenden: Dateien
:
The Curious Case of PHL 293B A Long-lived Transient in a Metal-poor Blue Compact Dwarf Galaxy.pdf (beliebiger Volltext), 824KB
 
Datei-Permalink:
-
Name:
The Curious Case of PHL 293B A Long-lived Transient in a Metal-poor Blue Compact Dwarf Galaxy.pdf
Beschreibung:
-
OA-Status:
Sichtbarkeit:
Privat
MIME-Typ / Prüfsumme:
application/pdf
Technische Metadaten:
Copyright Datum:
-
Copyright Info:
-
Lizenz:
-

Externe Referenzen

einblenden:

Urheber

einblenden:
ausblenden:
 Urheber:
Burke, Colin J., Autor
Baldassare, Vivienne F., Autor
Liu, Xin, Autor
Foley, Ryan J., Autor
Shen, Yue, Autor
Palmese, Antonella, Autor
Guo, Hengxiao, Autor
Herner, Kenneth, Autor
Abbott, Tim M. C., Autor
Aguena, Michel, Autor
Allam, Sahar, Autor
Avila, Santiago, Autor
Bertin, Emmanuel, Autor
Brooks, David, Autor
Rosell, Aurelio Carnero, Autor
Kind, Matias Carrasco, Autor
Carretero, Jorge, Autor
da Costa, Luiz N., Autor
Vicente, Juan De, Autor
Desai, Shantanu, Autor
Doel, Peter, AutorEifler, Tim F., AutorEverett, Spencer, AutorFrieman, Josh, AutorGarcía-Bellido, Juan, AutorGaztanaga, Enrique, AutorGruen, Daniel, AutorGruendl, Robert A., AutorGschwend, Julia, AutorGutierrez, Gaston, AutorHollowood, Devon L., AutorHonscheid, Klaus, AutorJames, David J., AutorKrause, Elisabeth, AutorKuehn, Kyler, AutorMaia, Marcio A. G., AutorMenanteau, Felipe, AutorMiquel, Ramon, AutorPaz-Chinchón, Francisco, AutorPlazas, Andrés A., AutorSanchez, Eusebio, AutorSantiago, Basilio, AutorScarpine, Vic, AutorSerrano, Santiago, AutorSevilla-Noarbe, Ignacio, AutorSmith, Mathew, AutorSoares-Santos, Marcelle, AutorSuchyta, Eric, AutorSwanson, Molly E. C., AutorTarle, Gregory, AutorTucker, Douglas L., AutorVarga, Tamas Norbert1, Autor           Walker, Alistair R., Autor mehr..
Affiliations:
1Optical and Interpretative Astronomy, MPI for Extraterrestrial Physics, Max Planck Society, ou_159895              

Inhalt

einblenden:
ausblenden:
Schlagwörter: -
 Zusammenfassung: We report on small-amplitude optical variability and recent dissipation of the unusually persistent broad emission lines in the blue compact dwarf galaxy PHL 293B. The galaxy's unusual spectral features (P Cygni-like profiles with ~800 km s−1 blueshifted absorption lines) have resulted in conflicting interpretations of the nature of this source in the literature. However, analysis of new Gemini spectroscopy reveals the broad emission has begun to fade after being persistent for over a decade prior. Precise difference imaging light curves constructed with the Sloan Digital Sky Survey and the Dark Energy Survey reveal small-amplitude optical variability of ~0.1 mag in the g band offset by 100 ± 21 pc from the brightest pixel of the host. The light curve is well-described by an active galactic nuclei (AGN)-like damped random walk process. However, we conclude that the origin of the optical variability and spectral features of PHL 293B is due to a long-lived stellar transient, likely a Type IIn supernova or nonterminal outburst, mimicking long-term AGN-like variability. This work highlights the challenges of discriminating between scenarios in such extreme environments, relevant to searches for AGNs in dwarf galaxies. This is the second long-lived transient discovered in a blue compact dwarf, after SDSS1133. Our result implies such long-lived stellar transients may be more common in metal-deficient galaxies. Systematic searches for low-level variability in dwarf galaxies will be possible with the upcoming Legacy Survey of Space and Time at the Vera C. Rubin Observatory.

Details

einblenden:
ausblenden:
Sprache(n):
 Datum: 2020-04-29
 Publikationsstatus: Online veröffentlicht
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: DOI: 10.3847/2041-8213/ab88de
Anderer: LOCALID: 3240582
 Art des Abschluß: -

Veranstaltung

einblenden:

Entscheidung

einblenden:

Projektinformation

einblenden:

Quelle 1

einblenden:
ausblenden:
Titel: The Astrophysical Journal Letters
  Andere : Astrophys. J. Lett.
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: Chicago, IL : University of Chicago Press for the American Astronomical Society
Seiten: - Band / Heft: 894 (1) Artikelnummer: L5 Start- / Endseite: - Identifikator: ISSN: 2041-8205
CoNE: https://pure.mpg.de/cone/journals/resource/954922828215