The infrared K-band identification of the DSO/G2 source from VLT and Keck data

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F14%3A00429558" target="_blank" >RIV/67985815:_____/14:00429558 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1017/S1743921314000726" target="_blank" >http://dx.doi.org/10.1017/S1743921314000726</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1017/S1743921314000726" target="_blank" >10.1017/S1743921314000726</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The infrared K-band identification of the DSO/G2 source from VLT and Keck data

Popis výsledku v původním jazyce

A fast moving infrared excess source (G2) which is widely interpreted as a core-less gas and dust cloud approaches Sagittarius A* (Sgr A*) on a presumably elliptical orbit. VLT Ks -band and Keck K'-band data result in clear continuum identifications and proper motions of this ˜19 m Dusty S-cluster Object (DSO). In 2002-2007 it is confused with the star S63, but free of confusion again since 2007. Its near-infrared (NIR) colors and a comparison to other sources in the field speak in favor of the DSO being an IR excess star with photospheric continuum emission at 2 microns than a core-less gas and dust cloud. We also find very compact L'-band emission (<0.1") contrasted by the reported extended (0.03" up to ˜0.2" for the tail) Brgamma emission. The presence of a star will change the expected accretion phenomena, since a stellar Roche lobe may retain a fraction of the material during and after the peri-bothron passage.

Název v anglickém jazyce

The infrared K-band identification of the DSO/G2 source from VLT and Keck data

Popis výsledku anglicky

A fast moving infrared excess source (G2) which is widely interpreted as a core-less gas and dust cloud approaches Sagittarius A* (Sgr A*) on a presumably elliptical orbit. VLT Ks -band and Keck K'-band data result in clear continuum identifications and proper motions of this ˜19 m Dusty S-cluster Object (DSO). In 2002-2007 it is confused with the star S63, but free of confusion again since 2007. Its near-infrared (NIR) colors and a comparison to other sources in the field speak in favor of the DSO being an IR excess star with photospheric continuum emission at 2 microns than a core-less gas and dust cloud. We also find very compact L'-band emission (<0.1") contrasted by the reported extended (0.03" up to ˜0.2" for the tail) Brgamma emission. The presence of a star will change the expected accretion phenomena, since a stellar Roche lobe may retain a fraction of the material during and after the peri-bothron passage.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

The Galactic center: Feeding and Feedback in a Normal Galactic Nucleus

ISBN

9781107044616

ISSN

1743-9213

e-ISSN

—

Počet stran výsledku

5

Strana od-do

269-273

Název nakladatele

Cambridge University Press

Místo vydání

Cambridge

Místo konání akce

Santa Fe

Datum konání akce

30. 9. 2013

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000450812600064